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• Increased air flow over the stock air filter.
• Designed to increase horsepower and throttle response.
• Easily fits inside the factory air box.
• Larger surface area over foam filters which offers longer service intervals in dusty conditions.
• Four layers of premium cotton gauze provides outstanding filtration.
• Washable & re-usable, never wears out.
• One filter will last the lifetime of your bike.

The OEM foam secondary filter can deteriorate rather quickly. Once that happens, it can allow enough dirt into the engine to do significant damage. Replace your filter now with a high-quality foam filter from industry leader Twin Air.

This filter needs to be oiled like any air filter to work properly.

Only for bikes with the stock BST40 carburetor!

The OEM vent foam filter can deteriorate after only a couple of years. When it does it can allow enough dirt into the engine to do significant damage. Replace your filter now with a washable cotton & steel screen filter.

This filter is recommended to be oiled like any other air filter to work properly.

Only for bikes with the stock BST40 carburetor!

A ProCycle exclusive. This is our favorite air filter for the DR650. Made just for us by the folks at DT1.

• Unique triple stage foam filter designed for the most extreme conditions
• Increased protection against silt, water, and sand
• Allows for extended filter service intervals
• Neoprene base gives superior sealing to air box
• Includes resealable bag for easy oiling and storage

NoToil cleaner NOT recommended with this filter. May cause delamination.

• Unique triple stage foam filter designed for the most extreme conditions
• Increased protection against silt, water, and sand
• Allows for extended filter service intervals
• Can be cleaned, re-oiled, and re-used like a 2-stage filter
• Neoprene base gives superior sealing to airbox
• Includes resealable bag for easy oiling and storage

• Dual stage foam: Two different pore sizes create more trapping area for even the smallest dust particles
• Flame laminated foam: Both “stages” are not glued, but heat sealed to provide maximum air flow
• Reticulated foam: Increases dirt stopping surface area and increase foam strength
• Strongest glue seams will withstand harsh solvents and gas (although we can’t understand why you’d want to use them). Pull as hard as you can, foam will rip before the glued seam will
• Light color foam easier to spot where the filter oil has covered and where it has not
• OEM size for more dirt stopping capability
• Handmade
• Every square inch of each filter is and inspected for quality

• Increased air flow over the stock air filter
• Designed to increase horsepower and throttle response
• Easily fits inside the factory air box
• Larger surface area over foam filters which offers longer service intervals in dusty conditions
• Four layers of premium cotton gauze provides outstanding filtration
• Washable & re-usable, never wears out
• One filter will last the lifetime of your bike

• Increased air flow over the stock air filter
• Designed to increase horsepower and throttle response
• Designed to fit inside the factory air box
• Larger surface area over foam filters which offers longer service intervals in dusty conditions
• Four layers of premium cotton gauze provides outstanding filtration
• Washable & re-usable, never wears out
• One filter will last the lifetime of your bike

Tired of paying too much for OEM paper filters? Drive in wet/rainy weather? Get an K&N filter for your ruckus! K&N filters are reusable, waterproof, and will save you money over the life of your scooter.

• Fits in the stock air box with no modifications needed.
• One filter will last the lifetime of your scooter with proper maintenance
• Increased air flow over the stock air filter
• Four layers of premium cotton gauze provides outstanding filtration
• Washable & re-usable, never wears out
• K&N filters are waterproof. Perfect for wet weather riding where a stock paper filter would get destroyed.

Dual stage foam: 2 different pore sizes create more trapping area for even the smallest dust particles. Flame laminated foam: Both "Stages" are not glued but heat sealed to provide maximum air flow. Light color foam makes it easier to see where the filter oil has covered and where it has not.

• Made of flame-laminated dual-layer foam, bonded with the highest quality glue to stand up to the roughest and toughest of any style of riding or terrain
• This filter, used with No Toil foam filter treatment, provides the best air filtration system in the world
• Fully open-cell structure for highest airflow and maximum protection
• Heavy-duty glue provides protection from all solvents
• Wide soft sealing ring for extra protection
• Flexible seams prevent cracking
• Original OEM size

A quality foam Air Filter to replace the stock one. Uses the same guide and frame as the stock unit. It requires foam filter oil to properly trap dirt particles. Don't forget the Evolution Air Filter Oil kit from No Toil.

• Designed to fit in the factory air box exactly like original filter
• The best selling replacement air filter for competition motorcycles and ATVs
• Unique two stage design allows for easy and complete cleaning
• Dual layer of foam, can be serviced separately
• Thin Ultra Seal base is virtually impossible to tear and has a built-in "Grease Groove"

Genuine Kawasaki replacement air filter.

• Fits directly into OEM airbox with application specific Sealing Bead to ensure a precise fit
• Fuel-management modifications are not required for increased performance
• Pleated media provides a large filtration area offering long service intervals
• Washable and reusable, pre-oiled and ready to ride
• Designed to provide increased performance

Have you lost or broken the stock air filter cage for your DR? Maybe you need a spare? Here it is, the OEM cage that will fit any of the foam air filters on this page. This kit includes the plastic holder that keeps the cage in place and the screw for that as well.

• Increased air flow over the stock air filter
• Designed to increase horsepower and throttle response
• Designed to fit inside the factory air box
• Larger surface area over foam filters which offers longer service intervals in dusty conditions
• Four layers of premium cotton gauze provides outstanding filtration
• Washable & re-usable, never wears out
• One filter will last the lifetime of your bike

• Precision engineered to perfectly fit the factory airbox, these filters meet or exceed OEM specifications
• Direct replacement of original equipment filter with no need to change carburetor jets or settings
• Manufactured from world-class materials to achieve optimum performance and engine protection

• Increased air flow over the stock air filter
• Designed to increase horsepower and throttle response
• Easily fits inside the factory air box
• Four layers of premium cotton gauze provides outstanding filtration
• Washable & re-usable, never wears out
• One filter will last the lifetime of your bike

Two layers of foam, catch and retain nearly any contamination you will encounter.

The adhesive that holds the two materials together withstands repeated cleanings even with harsh solvents or gasoline.

These filters are slightly smaller than stock to increase air space around the filter, improving circulation and air flow. A thick, flat breathable foam gasket forms a grease free sealing ring that ensures maximum contact with your airbox.

This kit includes 2 fire resistant pre-oiled air filters and 2 plastic filter frames.

The screws and nuts that hold the Air-box Cover on have a habit of jumping out of the air-box and running away. No idea where they go, but it is far! These cannot be purchased separately from Suzuki but we found some that are perfect replacements. This little kit includes four screws and the square nuts that go into the air-box. We recommend that you put a dab of silicone or something to hold the nuts in so they don't jump ship like the other ones did.

Genuine Yamaha OEM replacement air-box seals.

Click on image to enlarge

• Increased air flow over the stock air filter
• Designed to increase horsepower and throttle response
• Easily fits inside the factory air box
• Larger surface area over foam filters which offers longer service intervals in dusty conditions
• Four layers of premium cotton gauze provides outstanding filtration
• Washable & re-usable, never wears out
• One filter will last the lifetime of your bike

• Manufactured to perfectly fit the factory airbox, these filters use top-quality materials from around the world including the Powerflow filtering media
• Direct replacement of original equipment filter with no need to change carburetor jets or settings
• Designed and developed to meet the demands of high-performance engines

Unsurpassed in airflow, dirt stopping and overall performance. Adding a pre-filter to your intake system gives you extra protection from damaging contaminants.

Dual stage foam: 2 different pore sizes create more trapping area for even the smallest dust particles. Flame laminated foam: Both "Stages" are not glued but heat sealed to provide maximum air flow. Light color foam makes it easier to see where the filter oil has covered and where it has not.

• Made of flame-laminated dual-layer foam, bonded with the highest quality glue to stand up to the roughest and toughest of any style of riding or terrain
• This filter, used with No Toil foam filter treatment, provides the best air filtration system in the world
• Fully open-cell structure for highest airflow and maximum protection
• Heavy-duty glue provides protection from all solvents
• Wide soft sealing ring for extra protection
• Flexible seams prevent cracking
• Original OEM size

Here's a UNI dual layer foam air filter element to fit our TW200s. Needs to be treated with air filter oil like any other foam filter.

Thick, flat foam, greaseless sealing ring ensures maximum contact with your airbox while acting as a breathable gasket for increased air passage

Features:

• Coarse open-pore foam catches airborn dirt, grime, and sand
• Fine open-pore inner foam acts as second filter to trap the smallest particles while ensuring maximum air passage
• Adhesive withstands repeated cleaning
• Smaller than stock to increase air space and circulation around filter
• exclusively formulated adhesive withstands repeated cleaning. even with harsh solvents or gasoline
• twin air filters are slightly smaller than stock filters to increase air space around the filter and improve circulation

Genuine Honda replacement air filter.

Hiflofiltro air filters are manufactured to fit the factory air box and are a direct replacement for original equipment filters. 

Top quality powerflow filtering media, developed for modern high performance engines.

• Unique triple stage foam filter designed for the most extreme conditions
• Eliminates the need for power robbing dust covers and outerwear covers
• Increased protection against silt, water, and sand
• Allows for extended filter service intervals
• Can be cleaned, re-oiled, and re-used like a 2 stage filter
• Used by factory off road teams around the world

Twin Air Filter's patented design, high quality materials and superior construction deliver unbeatable performance and protection - and make Twin Air Filters the hands-down choice of more World and National Champions than all other filters combined.

The air filter is your engine's only protection against the elements, and your stock filter isn't up to the task. Replace it with a Twin Air-the #1 filter system proven on motocross tracks around the world.

Twin Air's fused layers of open-pore foam and fine inner foam trap even the smallest particles-without restricting airflow.

• Dual-bonded foam design filters out even the smallest dirt particles, while allowing more airflow than two separate layer filters (flow bench proven)
• High quality materials and superior construction deliver unbeatable performance and protection
• Backfire-resistant layer of foam laminated to the inside

Genuine Honda replacement air filter.

Twin Air Filter's patented design, high quality materials and superior construction deliver unbeatable performance and protection - and make Twin Air Filters the hands-down choice of more World and National Champions than all other filters combined.

An air filter is your engine's only protection against the elements, and your stock filter isn't up to the task. Replace it with a Twin Air- the number 1 filter system proven on motocross tracks around the world.

Twin Air's fused layers of open-pore foam and fine inner foam trap even the smallest particles-without restricting airflow

• Dual-bonded foam design filters out even the smallest dirt particles, while allowing more airflow than two separate layer filters (flow bench proven)
• Twin Air filters are slightly smaller than stock to make them easier to change and to increase dead air space around the filter for better performance
• Flat foam sealing ring securely seats against the airbox, even in the worst riding conditions
• Complete kit that includes a new cage.  Replacement foam can be purchased separate for routine maintenance.

Thick, flat foam, greaseless sealing ring ensures maximum contact with your airbox while acting as a breathable gasket for increased air passage

Features:

• Coarse open-pore foam catches airborn dirt, grime, and sand
• Fine open-pore inner foam acts as second filter to trap the smallest particles while ensuring maximum air passage
• Adhesive withstands repeated cleaning
• Smaller than stock to increase air space and circulation around filter
• exclusively formulated adhesive withstands repeated cleaning. even with harsh solvents or gasoline
• twin air filters are slightly smaller than stock filters to increase air space around the filter and improve circulation

• Designed to fit in the factory air box exactly like original filter
• The best selling replacement air filter for competition motorcycles and ATVs
• Unique two stage design allows for easy and complete cleaning
• Dual layer of foam, can be serviced separately
• Thin Ultra Seal base is virtually impossible to tear and has a built-in "Grease Groove"

Genuine KTM replacement air filter. Replace your air filter at recommended service intervals.

This seal helps keep debris and water out of your DR650 air box and it may become damaged or missing over the years. It is an important part of your DR650's intake system to maintain & prolong air filter life.

Simply, remove the air box door, then remove the old seal and clean out the track it sat in. Set the new seal in place and cut off any excess material remaining. Install the air box door and you are done.

Twin Air Filter's patented design, high quality materials and superior construction deliver unbeatable performance and protection - and make Twin Air Filters the hands-down choice of more World and National Champions than all other filters combined.

The air filter is your engine's only protection against the elements, and your stock filter isn't up to the task. Replace it with a Twin Air-the #1 filter system proven on motocross tracks around the world.

Twin Air's fused layers of open-pore foam and fine inner foam trap even the smallest particles-without restricting airflow.

Twin Air's high quality materials and superior construction deliver unbeatable performance and protection. The hands-down choice of more World and National Champions than all other filters combined.

Twin Air's fused layers of open-pore foam and fine inner foam trap even the smallest particles without restricting airflow.

Sold in 6 packs

• Compatible with many air filter boxes. Easy to install by drilling 1’’ holes in airbox housing and snap fitting vents in.
• May be cleaned and re-oiled
• More air flow allows you to add more fuel to your intake mixture, increasing performance.
• 1" Diameter

Not legal for use on pollution controlled vehicles in the state of California.

• Designed to fit in the factory air box exactly like original filter
• The best selling replacement air filter for competition motorcycles and ATVs
• Unique two stage design allows for easy and complete cleaning
• Dual layer of foam, can be serviced separately
• Thin Ultra Seal base is virtually impossible to tear and has a built-in "Grease Groove"

• Dual-bonded foam design filters out even the smallest dirt particles, while allowing more airflow than two separate layer filters (flow bench proven)
• Twin Air filters are slightly smaller than stock to make them easier to change and to increase dead air space around the filter for better performance
• Flat foam sealing ring securely seats against the airbox, even in the worst riding conditions

• Fits directly into OEM airbox with application specific Sealing Bead to ensure a precise fit
• Fuel-management modifications are not required for increased performance
• Pleated media provides a large filtration area offering long service intervals
• Designed to provide increased performance
• Made in the U.S.A.

No Toil air filter to replace the stock unit. Fits the stock airbox using the standard guide and frame. It requires foam filter oil to properly trap dirt particles. Don't forget the Evolution Air Filter Oil kit from No Toil.

R&D introduces "Flex-Jet", a simple, effective flexible shaft design. Quick adjustments are now within easy reach. Besides easy access, another benefit is the Flex-Jet's ability to hold its setting. Loose fuel screws are now a thing of the past. Kit includes: Flex-Jet (Remote Fuel Screw), bracket, screw, spring, washer, O-ring and instructions.

Not for the stock DR650 carburetor Fits FCR-MX conversions Only.

Top quality brass screw with molded knob for easy adjustments.

Not for the stock DR650 carburetor Fits FCR-MX conversions Only.

Contains genuine KEIHIN parts to rebuild your FCR41 pumper. Fresh o-rings and float needle insure you don't end up with a crank case full of fuel.

  Not for the stock carburetor. Fits FCR41 conversions only.

This brass fuel screw offers a longer head to give you a better hold for making adjustments. This is a nice improvement over the standard extended fuel screw. Kit includes one new screw, spring, washer and o-ring.

Direct replacement for the stock spring and exactly like the old Merge Racing spring. Gives a much more consistent accelerator pump squirt. Eliminates the need for the 'O-ring mod', wire or zip-ties on the pump arm. Fits all Keihin FCR-MX carbs except '07-'08 CRF250/450.

Not for the stock DR650 carburetor Fits FCR-MX conversion Only

This Kit replaces vital components in the BST40 Carburetor including new o-rings, gaskets, jets, needle, mixture screw, float bowl screws, float valve needle and seat (needle jet and other pressed in jets are not included in kit) to return the stock Mikuni BST40 Carburetor to like-new operation. As a bonus we have included Viton o-rings for the float assembly and 4 stainless steel allen screws.

The Remote Fuel Mixture Screw is 5 inches longer than stock. This gives you plenty of length to easily mount in a convenient location. Will work with the stock BST Carburetor as well as the TM40 pumper Carburetor.

Replaces the stock screw. Easy adjustment, without a screwdriver, of fuel mixture while the bike is running. For Keihin FCR carburetors.

Replace your worn out Mikuni stock drain hoses when they get old and brittle with a replacement hose set. 

These 3/16" hoses are measured and pre-cut to length. Kit includes all hoses that fit the Mikuni carburetor.

This is a new Diaphragm Set for your 1987-2000 TK carburetor. If yours has cracked or ripped, here is a replacement.

Kientech Fuel Screw for Suzuki DRZ400S/SM with the Mikuni BSR 36mm carb only. This fuel screw does NOT work on Keihin carbs.

Replace the worn slide guide in your stock Mikuni BST carburetor before it causes additional wear to the needle and needle jet. There are wear indicators on the slide guide that help you recognize when it is time to replace your slide guide. New O-ring included. 

Rebuild your crusty carburetor with parts from the same manufacturer the OEM companies use. Included in the kit are all necessary gaskets, O-rings, float valve and jets you need to rebuild your carburetor to like new condition.

Repair leaking carburetor or worn out float needle assembly.

• Kit contains all necessary gaskets, O-rings, float valve and jets
• Supplied by the same supplier the OEMs use
• Complete kit to rebuild OEM carburetor

The Phillips screws in Japanese motorcycles are not really Phillips screws. They are actually Japanese Industrial Standard (JIS) screws that are very easy to strip with Phillips head drivers.

Genuine FCR-MX Carburetor Rebuild Kit

Not for the stock BST DR650 carburetor, Fits FCR-MX conversions Only

This Kit replaces vital components in the BST40 Carburetor including new a Float, Needle Valve, Gaskets, Seals, Diaphragm, Spring and Float Bowl Screws to return the stock Mikuni BST40 Carburetor to like-new operation. As a bonus we have included Viton o-rings for the float assembly and 4 stainless steel allen screws.

This cover acts as an "adjustable leak jet" to fine tune the accelerator pump squirt.

Eliminates "4-stroke bog" when used with correct jetting. Allows the use of correct carburetor settings to optimize performance, starting and reliability. Improved low-end performance with much better throttle response. Investment cast and finished to precise tolerances with internal high volume vertical check valve. Fits all motorcycles and ATVs using a Keihin FCR carburetor Easy installation instructions (including online video) and template.

Not for the stock DR650 carburetor Fits FCR-MX conversions Only.

Genuine KEIHIN replacement parts for your FCR41 pumper carb. Ensure your beast is getting fed when it needs it!

  Not for the stock carburetor. Fits FCR41 conversions only.

Don't have a dyno tuning center nearby? Are you more of a do it yourself type? Are you constantly changing parts on your bike?

If you answer "yes" to any or all of the questions above, then our Auto Tune kit is for you. The Dynojet Auto Tune kit is an "add on" accessory that can be used with any of the Power Commander Vs

It connects to the PCV with a single cable and requires only a ground and +12 volt connection to be made to install. If your exhaust does not already have one, a "weld in" O2 sensor bung is included

Once installed, the Auto Tune kit monitors the fuel mixture (by installing the included Wide Band O2 sensor in the exhaust). It then sends this information to the Power Commander V and automatically corrects it while you ride. Each map that we offer has preset Air/Fuel ratio values included that we find to be the best overall settings. This lets you simply plug in the unit and let it do the work.

Power Commander Fuel Controller (PCFC) Product Introduction

Inexpensive yet very precise way to control your fuel curve.

The Power Commander FC is a plug-n-play fuel management device pre-programmed with Make/ Model specific maps. In addition the Power Commander FC has the added ability to modify or change these maps on the fly without a computer.

Users can literally select between a Power Commander FC Map, custom-built maps, or even fine tune low, mid or high rpm ranges while sitting on the bike and without plugging into a computer. Standard +/- 15% increments from selected map settings, different ranges are available using the supplied Control Center software.

Users can also load up to 10 of their personally built Power Maps into the Power Commander FC and select between them while in the saddle - eliminating the need to "re-boot" with the computer every time a new map is desired.

PCFC Features:

• Uses OEM style connectors and high quality wiring harnesses
• Small, lightweight and easy-to-fit on the bike
• Pre-programmed with PCFC Power Maps specific to make, model
• No computer necessary for modifying fuel management
• Fully adjustable computer compatibility for ultimate tuning and personalization
• Software is compatible with Power Commander, so you can download Power Commander maps to the PCFC
• +15 / -15 fuel change from the installed base map using the trim pots. Enough adjustment to cover almost all modifications

This unit does NOT work with any of the Dynojet accessories - SFM, Ignition Module, shifter, LCD.

The Power Commander 6 fuel injection tuning device allows you to optimize your fuel and timing curve (where applicable) giving you the confidence to roam freely. With fine tune adjustability and multiple inputs, the Power Commander 6 will keep your vehicle running at its full potential letting you concentrate on the journey ahead.

Featuring a plug-and-play setup, Power Commander 6 can be installed discreetly underneath your seat, cowl, dash or other location ensuring your ride looks as good as it runs. Removing the device reverts your vehicle completely back to stock. With the ability to store and switch between two maps on-the-fly  (via the map switch accessory) and connect to various Power Commander accessories such as the Autotune, Quickshifter or POD-300, the Power Commander 6 gives you features and functions that provide you with the ultimate ride.

All PC6 models have an end-user adjustment of +/-15 in the FUEL table and +/- 8 in the timing table (if applicable). This adjustment is on top of the values that are in the BASE map loaded to the device. This BASE map can be any of the available maps from the Dynojet website, or those you may have received from a third party.

• Compact design for discrete placement & easy uninstallation to revert to stock settings
• Easily change & upgrade tunes as you upgrade parts
• Comes with Power Core software that connects dyno runs with our EFI Tuning Devices to unlock your ride’s potential
• Pair with other Power Commander accessories like the Autotune, Quickshifter or POD-300
• Analog input allows you to install any 0-5 volt sensor and build an adjustment table based on its input such as boost or temperature
• Easily connects to your computer via USB
• Each cylinder can be mapped individually and for each gear, giving riders more granular control
• One year warranty
• Proudly made in the USA

(Map switch is not included. Sold Separately.)

Replaces the stock 2 wire Ruckus fuel level unit with a 3 wire unit that allows use of a multi-level fuel gauge.

The Power Commander 6 fuel injection tuning device allows you to optimize your fuel and timing curve (where applicable) giving you the confidence to roam freely. With fine tune adjustability and multiple inputs, the Power Commander 6 will keep your vehicle running at its full potential letting you concentrate on the journey ahead.

Featuring a plug-and-play setup, Power Commander 6 can be installed discreetly underneath your seat, cowl, dash or other location ensuring your ride looks as good as it runs. Removing the device reverts your vehicle completely back to stock. With the ability to store and switch between two maps on-the-fly  (via the map switch accessory) and connect to various Power Commander accessories such as the Autotune, Quickshifter or POD-300, the Power Commander 6 gives you features and functions that provide you with the ultimate ride.

All PC6 models have an end-user adjustment of +/-15 in the FUEL table and +/- 8 in the timing table (if applicable). This adjustment is on top of the values that are in the BASE map loaded to the device. This BASE map can be any of the available maps from the Dynojet website, or those you may have received from a third party.

• Compact design for discrete placement & easy uninstallation to revert to stock settings
• Easily change & upgrade tunes as you upgrade parts
• Comes with Power Core software that connects dyno runs with our EFI Tuning Devices to unlock your ride’s potential
• Pair with other Power Commander accessories like the Autotune, Quickshifter or POD-300
• Analog input allows you to install any 0-5 volt sensor and build an adjustment table based on its input such as boost or temperature
• Easily connects to your computer via USB
• Each cylinder can be mapped individually and for each gear, giving riders more granular control
• One year warranty
• Proudly made in the USA

• Developed for a streamlined user interface to make choosing and tuning a map easier for the end user
• Each cylinder can be mapped individually and for each gear, giving riders more granular control
• Pair with other Power Commander accessories like the Autotune, quickshifter or POD-300
• Compact design for discrete placement and easy installation
• Easily change and upgrade tunes as you upgrade parts

Most fuel injected systems are very lean in their stock configuration. This is good for economy and emissions, but not performance. This unit allows you to adjust the Fuel/Air (F/A) ratio without remapping the ECU and getting into complicated software programs. The PowerJet Fuel Controller allows you to adjust the fuel map from -4% to +10% by selecting one of 10 built-in settings (including stock).

The device works by measuring the outside air temperature very close to where the stock sensor is located and then adjusts the signal from the OEM air temperature sensor to the ECU to make use of the Air Temperature Correction factor that is built into the stock ECU. The ECU is told that the intake air is a little cooler than it actually is and it responds by richening the injection map very slightly. How much depends on your setting on the PowerJet. This will result in improved throttle response, especially if you have an aftermarket exhaust of any kind.

PowerJet is easily installed by plugging it in between the stock AIT sensor and the bike's wiring harness under the seat. This can be done very quickly as they are exactly the same plugs. Unplug the stock connection, plug in the PowerJet on each side. The PowerJet fits easily under the seat behind the battery as it is rugged and waterproof. PowerJet comes with a full one year warranty.

The New Power Commander V is loaded with tons of new features.

• USB powered from computer (9 volt adapter is no longer needed for programming)
• Gear input (allows for map adjustment based on gear and speed)
• Analog input (allows user to install any 0-5 volt sensor and build an adjustment table based on its input such as boost or temperature)
• With gear position input connected the PCV is capable of allowing each cylinder to be mapped individually and for each gear (for example: on a 4 cylinder bike with a six speed transmission there could be up to 24 separate fuel tables).
• 10 throttle position columns (up from 9 on PCIIIusb)
• Enhanced "accel pump" utility (increased adjustment and sensitivity ranges)

The Dynojet Auto Tune kit is an "add on" accessory that can be used with any of our Power Commander V’s. It connects to the PCV with a single cable and requires only a ground and +12 volt connection to be made to install. If your exhaust does not already have one, a "weld in" O2 sensor bung is included.

Once installed, the Auto Tune kit monitors the fuel mixture (by installing the included Wide Band O2 sensor in the exhaust). It then sends this information to the Power Commander V and automatically corrects it while you ride. Each map that we offer has preset Air/Fuel ratio values included that we find to be the best overall settings. This lets you simply plug in the unit and let it do the work.

We all love our TWs, but the stock jetting leaves much to be desired! Here is a Jet Kit for your stock TK carburetor to improve your throttle response. Included in the Kit are a wide range of main jets to cover any setup, one Pilot Jet, one Jet Needle, and five Needle Shims. If you have added an exhaust system or ride at higher elevations, this is a great way to tune your TW for your needs.

Perfect for Dirt Bikes with a stock engine using the stock airbox, air filter, and pipes.

Stage 1 Jet Kits are engineered to improve throttle response and deliver approximately 5% more horsepower than stock.

These kits are fully adjustable to allow the use of well-designed aftermarket pipes and stock replacement air filters, like K&N.

Dynojet Jet Kits increase power and smoothness throughout the entire rev range, while maintaining optimum fuel economy. Each Dynojet Jet Kit includes comprehensive instructions which show step-by-step installation and testing procedures to ensure a perfect setup every time.

• Stage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increase
• Increases power and drivability
• Fully adjustable

Tune your stock carburetor for better power and response, easier starting and quicker warm up. Mikuni main and pilot jets.

• Main Jets: 127.5, 130, 132.5 &135
• Pilot Jets: 42.5 & 45
• 5 Shim washers for raising the needle

Our own jet kit for the DR650 stock Mikuni BST40 carburetor. Includes the extended fuel mixture screw and stainless steel Allen screws for the float bowl and top cap. Also included are new Viton o-rings for the float. Comes with easy to understand detailed instructions and diagrams. Includes a template for modifying the air box.

Designed for use with stock engines using either stock or aftermarket exhaust and air filters.

• Provides a simple and affordable solution to carburetor tuning problems.
• Allows you to tune your bike for increased power and smoothness while retaining fuel economy.
• Includes a guide booklet on how to install and use your jet kit to it's full potential.
• For a top quality installation we recommend adding an extended fuel screw and a set of replacement carburetor screws.

• Provides a simple and affordable solution to carburetor tuning problems
• Allows you to tune your bike for increased power and smoothness while retaining fuel economy
• Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increase
• Increases power and driveability
• Fully adjustable

This kit includes 2 needles that have been developed by JD Jetting and manufactured for them to their exacting specifications. These two needles allow a wide range of tuning possibilities and provide correct fuel delivery at any throttle position.

4 Allen type screws for the float bowl are also enclosed should you strip out the stock screws during your tuning process. Complete instructions with photos, jetting suggestions for different set-ups and situations, 4 Main Jets, a new Pilot Jet, and a drill bit complete the package.

Tune your stock carburetor for better power and response, easier starting and quicker warm up. Mikuni main and pilot jets.

• Main Jets: #110 & #112.5
• Pilot Jets: #17.5 & #20

Dynojet Jet Kits increase power and smoothness throughout the entire rev range, while maintaining optimum fuel economy. Each Dynojet Jet Kit includes comprehensive instructions which show step-by-step installation and testing procedures to ensure a perfect setup every time.

• Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increase
• Increases power and drivability
• Fully adjustable

Dynojet Jet Kits increase power and smoothness throughout the entire rev range, while maintaining optimum fuel economy. Each Dynojet Jet Kit includes comprehensive instructions which show step-by-step installation and testing procedures to ensure a perfect setup every time.

• Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increase
• Stage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increase
• Increases power and drivability
• Fully adjustable

Designed for use with stock engines using either stock or aftermarket exhaust and air filters.

• Provides a simple and affordable solution to carburetor tuning problems
• Allows you to tune your bike for increased power and smoothness while retaining fuel economy
• Includes a guide booklet on how to install and use your jet kit to its full potential

Original equipment replacement 'in-tank' fuel filter.

Traveling where fuel quality will be questionable? Carry a spare fuel filter.

Want an amazing increase in throttle response? More power over a much wider range? The Mikuni TM40 does all of that plus runs smoother at lower RPMs and pulls taller gearing with ease.

Our complete kit comes with alloy adapter rings bonded to the genuine TM40 carburetor body for a firm reliable fit in the stock air boots. We also include new low friction cables, an extended fuel screw, complete instructions along with a wide range of extra jetting for fine tuning. It even has a vacuum port for the stock fuel petcock.

The carburetor comes pre-jetted for the typical mods: performance pipe and modified air box, or we can set it up for your particular bike before we ship it out.

 Instead of the tough to reach choke knob, all TM40's come with a remote choke and bracket. This makes it easier to reach the knob, especially if you have an oversize tank.

Replacement Air Cutoff valve from Yamaha

Kit Includes:

• Diaphram Assembly
• Spring

Extended float bowl screws from Wirth Machine for your TM40 that use 1/4" size wrench to loosen. Allowing easy access to your jets and float without having to remove the carburetor from the bike. Sold in a 4 pack. Stainless steel threads.

Extended float bowl screws from Wirth Machine for your OEM BST carburetor that use 5/6" or 8mm size wrench to loosen. Allowing easy access to your jets and float without having to remove the carburetor from the bike. Sold in a 2 pack. Stainless steel threads.

Replacement socket head (Allen) screws in case you strip out the stock JIS heads on your TM40 bowl. The originals can be stripped out when doing any tuning or carburetor maintenance. Sold in a pack of four, all for the bowl.

Replacement socket head (Allen) screws for the OEM BST40 Carburetor. The factory screws that hold the top cap and float bowl on the stock carburetor are very easily damaged. The originals are usually installed unbelievably tight from the factory. It is common to ruin the stock screws when installing a jet kit or doing any other carburetor maintenance. Sold in a pack of four. Two for the cap and two for the float bowl.

If you are converting a Keihin FCR-MX 39 to fit on your DR, you need to start here. This 6061 T6 aluminum adapter bonds to the airbox side of the carb so it will easily fit the DR.

  Not for the stock carburetor Fits FCR-MX conversions only.

The Mikuni TM42-6 HSR flows 17CFM more than the TM40-6 and incorporates many upgraded features such as a roller-bearing slide.

All this means going even faster has never been so easy, say goodbye to hard starting, hesitations and flat spots.

Strip out the bowl screws on your KLR? Carb top screws get rusty? Here is a set of 4 allen screws and lock washers for the bowl and 4 allens and flat washers for the vacuum top.

Hate the handlebar mounted choke lever? Can't reach the choke knob? Does your Safari or IMS tank make using the choke difficult?

Our adjustable cable operated choke knob mounts to the left side engine case and works for either the stock BST or Mikuni TM40.

Replacement rubber boot for choke knob assembly.

Replace your handlebar mounted choke with this simple knob mounted directly on the carburetor.

Available in short or long reach.

Long reach is easier to use while wearing riding gloves.

Works for either the stock BST or Mikuni TM40.

Better throttle response. More power over a much wider range.

Kit includes pre-jetted genuine Mikuni TM36 Pumper carb and push/pull throttle cables. Everything is included to mount this carb to your bike. Well suited for stock to mildly modified motors.

Tune your stock carburetor for better power and response, easier starting and quicker warm up. Mikuni main and pilot jets and adjustable needle.

• #20 and #22.5 pilot jets
• #107.5 and #110 main jets
• 3 position adjustable needle

Boyesen Pro Series dual-stage reeds combine a carbon-fiber top reed with a fiberglass bottom reed for unrivaled performance. The Pro Series Reeds are more responsive than our traditional Power Reeds. The carbon-fiber top reed has excellent response characteristics that provides even quicker acceleration, stronger throttle response, and more over-rev than our standard Power Reeds. The fiberglass bottom reed provides stability and longer reed life.

Driven Engine Block-off Plates will stop the annoying and possibly damaging backfires from occurring while allowing you to remove a few pounds in associated valves and hoses from your bike. On late model EFI bikes with O2 sensors, ESPECIALLY when using Dynojet's Power Commander 6 with the Autotune feature, the air injection system MUST be blocked as it will introduce additional oxygen into the system which will skew your O2 sensor's values and make it impossible to get a correct tune.