Search Products

• Designed to provide increased performance
• Washable and reusable, pre-oiled and ready to ride
• Multi-layers of woven cotton gauze media offers excellent filtration
• Pleated media provides a large filtration area offering long service intervals
• Fits directly into OEM airbox with application specific Sealing Bead to ensure a precise fit
• Fuel-management modifications are not required for increased performance
• Made in the U.S.A. for over 50 years

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.

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.

• Each kit contains all necessary gaskets, O-rings, float valve and jets
• Complete kits to rebuild OEM carburetors

Twin Air'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.

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

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

• 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

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!

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.

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.

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.

Wraps around your K&N filter to keep water and small particles out of the filter itself. K&N DryChargers are manufactured from a durable polyester material and are pre-treated with a proprietary hydrophobic process designed to prevent splashes of water or mud from saturating your K&N air filter. The DryCharger will also stop small dirt particles; yet add little restriction to the airflow of the filter. The DryCharger can be installed under the Foam Wrap.

Pre-filter only, K&N air filter sold separate.

• Includes all necessary parts to rebuild the OEM fuel pump module
• Restore lost performance or non-functioning fuel pump with this economical solution
• Kit comes ready for plug-and-play installation

*NEW OFFERING

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.

POD-300 Digital Display

Simply connect the included CAN cable and you’re ready to go; there’s no need to tap power or deal with other messy connections.

• Real time fuel adjustments
• Display channels real-time: RPM, TP, map position (when using map switch), duty cycle, fuel change, speed, pressure, ignition change & wideband air/fuel ratio- (w/WB2 or AutoTune connected)
• Weather resistant for use in all conditions
• Log channels saved to internal memory and can be viewed / analyzed with Dynojet’s PowerCore Software
• High contrast display, viewable in direct sunlight
• 3 Programmable light alarms

Two-position map-switching is capable with this Single Pole, Single Throw switch. You can toggle between two different fuel maps quickly and easily.

For Use with the DynoJet Power Commander V

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.

• Multi air filter intake increases airflow, improves filtering efficiency and raises the engine's output performance
• High-quality foam filter is easy to assemble and disassemble
• Suitable for long-term use with repetitive cleaning

This kit includes all necessary components to repair your carburetor.

O.E.M. jet sizes are included in the kit.

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.

Buy both and save! Includes the Boyesen QuickShot 3 and Sunline Mixture Screw

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.

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.

The EJK evolved out of the need to address the ever-increasing complexity of factory fuel injection. For the newcomer to the market or professionals wanting an easier method for tuning fuel injection, the EJK is a customizable solution for the rider that wants to take control of their tuning needs.

This unit is a piggy-back EFI controller because it does not replace the stock ECU, but rather monitors the signals to the injectors and makes fuel adjustments based on the mode settings. The GEN 3 has a push button interface allowing access up to 6 different modes to allow for quick fine tuning by the end user without needing a computer.

Key Features:

• No computer or dyno needed!
• Plug and play, simple to install, base settings preset
• Unique load based technology
• Full range tunability available
• Does NOT interfere with stock ECU operation
• Simple push button adjustment interface
• Water-resistant 
• 2-Year warranty
• Compact size - 2.2" H x 3.4" W x 0.5" D

FunnelWeb ProLine Filter Highlights:

• Optimum air flow for increased riding time
• Improved engine protection
• Extended filter change intervals
• Simple to install, clean and re-oil
• Easy fitment

Like all FunnelWeb filters, the ProLine Filter features profile cut, single layer, single density foam that doubles the external surface area of the filter without increasing the original filter size. The ProLine Filter traps dirt, dust, sand and mud over a larger area on its outer surface, ensuring optimal air flow is maintained for maximized engine performance and reliability.

The single layer, single density polyurethane foam has the added advantage of being easy to clean and the ability to maintain its original shape after numerous washes. Overall, compared with conventional foam filters, FunnelWeb offers more protection from dirt ingestion, has longer service intervals and maintains high airflow rates when dirty.

• 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

Has your TM40 carburetor been sitting for too long and now needs to be rebuilt? Then what you need is this TM40 Rebuild Kit that contains Genuine Mikuni replacement parts.

This kit includes:

• Needle Clip and Washer
• Top Cover Gasket
• A/P Nozzle O-Ring, Plug and Rubber Cap
• Fuel Screw O-Ring, Washer and Spring
• Float Bowl O-Ring
• Pilot Fuel Screw
• Drain Plug O-Ring
• #3.8 Needle Valve Assembly
• O-Ring for the Starter Circuit and Needle Valve
• New Screws for the Float Bowl
• Vent Hose

Yamaha uses this seal material in many places on several motorcycles. It is like weatherstripping and is used to seal up the edges in the TW200 air-box. It seals up the air-box so that water and grime can't enter the air-box from the side. Ensures that air entering the box comes from up under the seat.

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

• 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

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

Our own jet kit for the Mikuni TM40 carburetor.

Includes new main jets, pilot jets and a new needle with e-clip.

Comes with a printed Mikuni tuning manual and a jetting suggestion chart.

  Not for the stock carburetor Fits TM40 conversions Only

Geared for the do-it-yourselfer that already has a TM40 or HS40. This kit supplies everything you need to convert it for use on your bike.

Kit includes intake and air boot adapters, throttle cables, choke knob, accelerator pump nozzle, a wide selection of main and pilot jets plus a TM40 tuning manual.

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.

Each kit contains float bowl gasket (or o-ring), float valve assembly (or float needle) and o-rings to rebuild one OEM carburetor body.

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

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.

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.

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.

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

Repair kit comes with everything you need to get your carb back in shape.

This is the more economical alternative to eliminating the 990 Adventure airbox. Better breathing equals more power. The ITG filter kit makes air filter service a snap. It also simplifies other engine and intake maintenance chores. Our kit features a steel base plate which will not deform like plastic and does not conduct heat as much as aluminum. The white powder coating also helps reflect engine heat. To take advantage of the increased airflow, we recommend upgrading your fuel injection map with TuneEcu or a Power Commander.

• OPTION - Twin Air Breather Filter (replaces standard breather filter)

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!

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.

Comes with everything you need to freshen up your carburetor.

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.

• 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"

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.

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

• 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

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.

• 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

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 carb. Easy installation instructions (including online video) and template.

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.

Is the cylinder head intake boot on your DR650 cracked or weathered, is it missing parts of the lip to seal around the carburetor, have you recently pulled the intake boot off only to realize the O-ring behind it is hard & brittle? This kit is your solution to solving some of those mystery problems and make your bike like new again. There can be a great deal of heat that can radiate behind the cylinder head on a DR650 as it is an air cooled engine. With that comes long term maintenance items that will need to be replaced due to them being made of materials that cannot withstand those constant heat cycles indefinitely.

Our kit includes O.E. parts from Suzuki to include:

1. Intake Boot
2. Metal Clamp
3. Premium Japanese O-ring

This kit is for the 36mm Mikuni CV carburetor and 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 top of the carburetor 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, 5 Main Jets, a Pilot Jet and a drill bit complete the package.

• Include top cover gasket, jet needle E-ring and washer, throttle valve seal, pilot air O-ring, fuel joint O-ring, accelerator pump O-ring, needle valve O-ring, needle valve retainer screw, needle valve assembly, float bowl O-ring/gasket, overflow hose, float bowl screws, accelerator pump rod boot
• Genuine Mikuni parts properly replace worn or mistreated components for the TM42 carburetor
• Includes all the parts needed to rebuild TM42 carburetor

FunnelWeb ProLine Filter Highlights:

• Optimum air flow for increased riding time
• Improved engine protection
• Extended filter change intervals
• Simple to install, clean and re-oil
• Easy fitment

Like all FunnelWeb filters, the ProLine Filter features profile cut, single layer, single density foam that doubles the external surface area of the filter without increasing the original filter size. The ProLine Filter traps dirt, dust, sand and mud over a larger area on its outer surface, ensuring optimal air flow is maintained for maximized engine performance and reliability.

The single layer, single density polyurethane foam has the added advantage of being easy to clean and the ability to maintain its original shape after numerous washes. Overall, compared with conventional foam filters, FunnelWeb offers more protection from dirt ingestion, has longer service intervals and maintains high airflow rates when dirty.

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.

• 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

Complete kit to rebuild OEM carburetors.

Kit includes:

• 155 Main Jet
• 40 pilot jet
• #35 leak jet
• EMP needle

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

This is an O.E. replacement diaphragm for your BST40 carburetor.

• 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.

Genuine FCR-MX Carburetor Rebuild Kit

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

 This is a complete high-performance intake kit for the DR650 that includes our famous TM40 carburetor kit and a K&N air filter with ProCycle wrap.

• TM40 Carb pre-jetted and set-up for your particular DR650
• Custom throttle cables to work with the TM40
• Extra jets should you need them for fine tuning
• K&N air filter with
• Custom ProCycle outside foam wrap

• 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

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

This kit replaces the stock carburetor with a true pumper carb. This genuine FCR39  (Flatslide CR) Racing Carburetor will bring out the beast in the DRZ.

Following in their tradition of high technology and performance, Keihin’s carburetor design for racing is the FCR designed for downdraft engine design use. Features include a flatslide throttle operating on roller bearings with progressive linkage for smooth operation and control. Smooth bore venturi for maximum air flow. This is the ultimate racing carburetor for use on downdraft engines as found on many popular sportbikes destined for serious competition. Along with the highest level of technology available, the FCR’s have proven their advantage with race wins around the world.

Kit includes a brand-new horizontal type FCR39 carburetor, adapters, throttle cables and a new throttle assembly (which is required for the new pull-push cable system).

• 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

Hiflo filtro 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.

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

• 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.

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.

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.

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

The perfect tuner for users who are always on the move, the Power Vision 3 allows you to tap into more horsepower and optimize overall performance by quickly and easily flashing your ECU from anywhere.

• Easy-to-read, no-nonsense display puts performance at your fingertips
• Choose from a full library of pre-tested tunes or build a custom one on your own
• Compatible with Power Core software, allowing you to analyze performance data and make improvements. Flash performance tunes via OEM diagnostic connector, no need to remove and send out ECU
• Ability to store multiple tunes at a time
• Plug-n-play design attaches with O.E.M.-style connectors.
• High contrast display, viewable in direct sunlight
• Display vehicle data channels in real-time
• Weather resistant for use in all conditions

• 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

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

Are you a fan of K&N air filters? Here's one built just for the TW200. Top of line filtering to keep that engine healthy for years to come.

Quality air cutoff valve replacement kit contains parts necessary for a complete rebuild.

• Direct OEM-style replacement carburetor air cut-off valve set
• Includes diaphragm, spring and O-ring
• Located on the side of the carburetor, the air cut-off valve prevents lean fuel mixture (backfire) when decelerating
• Temporarily closes the pilot jet airway to provide a richer mix as the throttle closes

Top quality brass screw with molded knob for easy adjustments.

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

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.

Have you lost or broken the stock air filter cage for your KLR? 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 cage and the mounting hardware.

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.

• 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

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

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)

These Twin Air Dual-Stage air filters deliver unbeatable performance and protection which is why they are 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. This filter kit includes a new air filter cage.

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.

FunnelWeb ProLine Filter Highlights:

• Optimum air flow for increased riding time
• Improved engine protection
• Extended filter change intervals
• Simple to install, clean and re-oil
• Easy fitment

Like all FunnelWeb filters, the ProLine Filter features profile cut, single layer, single density foam that doubles the external surface area of the filter without increasing the original filter size. The ProLine Filter traps dirt, dust, sand and mud over a larger area on its outer surface, ensuring optimal air flow is maintained for maximized engine performance and reliability.

The single layer, single density polyurethane foam has the added advantage of being easy to clean and the ability to maintain its original shape after numerous washes. Overall, compared with conventional foam filters, FunnelWeb offers more protection from dirt ingestion, has longer service intervals and maintains high airflow rates when dirty.

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.

A new slide for the stock Mikuni BST carburetor.

Designed to increase horsepower and acceleration while providing excellent filtration.

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.

Quality rebuild kit by Moose Racing. Comes with everything you need to get your stock carburetor back in shape!

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.

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

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

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.