Fuel and Intake

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.

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.

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.

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 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.

• 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

• 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

• 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

• 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.

• 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

• 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

• 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

• 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

• 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

• 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.

K&N Replacement filters are designed for all street legal and off road motorcycles and ATVs to O.E.M. (manufacturers) size specifications and fit into your original OEM air box without modification of jet changes. Due to design and unique high flow characteristics, K&N filters allow engines to breathe free and produce optimum horsepower. Under most conditions K&N air filters never need to be replaced. With proper cleaning and care, K&N air filters will last the life of your engine.

• 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.

• 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

• 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

• 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

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.

• 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

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.

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.

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.

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.

Extra dirt protection for your K&N filter. Our custom made oiled-foam filter sleeve wraps snugly around the K&N filter to give a first layer of protection against dust and dirt. Oil it like you would any other foam filter.

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.

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.

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.

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.

Genuine Honda replacement air filter.

• These bands are the visible part of two fiber reinforced nylon injection moldings which form the structure on which the unique Tri-Foam filter system is bonded.
• The two outer layers of foam provide optimum filtration and load-up capacity while the inner layer is made of special self extinguishing filter foam.
• Together, they give the best combination for air flow, engine protection and safety.

This is ONLY a replacement filter for the ProCycle ITG kit and is not a direct swap for OEM.

High-performance, high-flow filter element and filter base for the TT-R 125.

• Replaces stock filter and base
• Filter base is made from HDPE plastic
• 3 times larger than stock filter!
• Adds almost 1/2 horsepower
• Designed to fit inside the factory air box

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)

• 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

• Bonded, two-layer foam designed for maximum protection and airflow
• Super Seal material seals off 100% water and remains air tight without grease.

• 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

• 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

• 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

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

Designed to increase horsepower and acceleration while providing excellent filtration.

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!

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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.

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

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.

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 #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 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!

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.

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

Here's a UNI dual layer foam air filter element for the KLX230. Needs to be treated with air filter oil like any other foam filter.

• 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"

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.

• 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"

• 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"

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

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 02 sensors, ESPECIALLY when using Dynojet's Power Commander V with the Autotune feature, the air injection system MUST be blocked as it will introduce additional oxygen into the system which will skew your 02 sensor's values and make it impossible to get a correct tune.

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.

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.

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.

OEM replacement air-box seals.

Click on image to enlarge

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.

Replacement Air Cutoff valve from Yamaha

Kit Includes:

• Diaphram Assembly
• Spring

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

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.

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

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

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

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.

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.

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.

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.

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.

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.

All the advantages of a flatslide pumper carburetor at a much friendlier price than a Keihin FCR.

Our complete genuine Mikuni TM40 pumper carburetor kit comes with alloy adapter rings bonded to the carburetor body for a firm reliable fit in the stock air boots. We also include new 3" longer than stock throttle cables, a remote mounted choke knob, complete instructions along with a wide range of main jets and pilot jets for fine tuning or to accommodate bikes with extensive modifications.

All the advantages of a flatslide pumper carburetor at a much friendlier price than a Keihin FCR.

Our complete genuine Mikuni TM40 pumper carburetor kit comes with alloy adapter rings bonded to the carburetor body for a firm reliable fit in the stock air boots. We also include a remote mounted choke knob, complete instructions along with a wide range of main jets and pilot jets for fine tuning or to accommodate bikes with extensive modifications.

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.

These Mikuni carburetors are correctly sized and easily fitted to your Honda XR600 and XR650L stock motor mounting flange after removing the locator tags and also match the air box when using the silver anodized air-box adapter. This adapter is fitted prior to delivery when purchasing complete kits. For this Mikuni carburetor to operate correctly the motorcycles air box must be opened up to allow more air flow in. Using a hole saw, a 45mm diameter hole will be sufficient for a Suzuki DR650 but some Honda’s require way more. The best process is to keep opening up the air-box until no more improvement is noticed and you will be surprised at the difference. The kit also comes with throttle cables and a 1/4 turn quick action throttle which must be lubed before fitment. The carb comes with a couple of  Honda specific adjustments made and pre jetted for your engine. A specially made size 30 pump nozzle is fitted as the accelerator pump circuit on TM42 carbs will not work properly on Honda’s or Kawasaki’s without it.

Climate, altitude and fuel density from different octane fuels all have varying effects on final fine tuning as does cam, exhaust and cylinder head porting etc. For this reason, we have included what we have found to be a range of jets to allow you to tune to most variables.

This carb fits with most aftermarket large capacity tanks.  Some larger capacity tanks do not allow the fitment of this carb without modification. A competent person can easily heat and depress the contact area around the throttle mechanism allowing for clearance on problem tanks. Polyethylene tanks start their life as lump of poly that when melted evenly spreads itself around a rotating mold, to later carefully heat with a heat gun any section of a tank and change the shape has no effect on the integrity of the poly itself unless pushed too far, thinning it. We recommend having this professionally done for the reason some people may neglect to properly remove all the fuel from an existing tank or if not competent may make a mess of it. 

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.

Here is the O-Ring that fits in the carburetor manifold. This is the manifold that holds the carb up to the cylinder head. The O-Ring mounts between this manifold and the cylinder head. When this O-Ring fails it allows air into your cylinder and makes your Air Fuel ratio too lean which causes the engine to run too hot.

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

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

This kit includes all necessary components to repair your carburetor.

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

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.