2-Stroke Yamaha 1988 YZ250 Carburetor Upgrade

Ready to use complete 2-stroke dirt bike carb upgrade for all models in fitment. Check out the options and upgrades above to further enhance the performance and feel of your motorcycle. 85-105cc carbs are $100.00 less; click the option above!

What’s included in the complete Keihin carburetor?

• This Complete Keihin Carb was fully Manufactured and assembled in Japan
• Jets and needle
• Throttle slide
• Float bowl
• Pink Hoses
• Choke Knob
• Air/Fuel Screw
• Idle Adjuster
• Mid Body
• Throttle Spring & Cap
• Float
• Needle Seat
• The complete throttle housing and cable kit are included if the option is selected above.
• If the option above is selected, a short carb body is also available, as shown in the second picture.

Complete Genuine Keihin of Japan Assembly Kit, Available in 3 sizes:

• 36mm – Low and best throttle response
• 38mm – Most popular and all-around power
• 39mm – Highest overall power
• Minis (85-105cc) dirt bikes will receive the 28mm OEM Carb size

Product info for this Genuine Keihin OEM Carburetor

• This is NOT an aftermarket Carburetor; these original carbs can cost upwards of $800 U.S.D. from the Dealer
• This dirt bike carburetor kit is ready to use on any two-stroke dirt bike and eliminates any wiring issues with a more simplistic bolt-up and ready-to-use carburetor
• We recommend the new throttle assembly option for older dirt bike models
• Carburetor intake side boot sizes may vary, and some intakes can get stiff over time, so it is best to heat or replace the rubber mounting for easier installation.
• The video below shows our Keihin 39mm Replacing a Mikuni TMX.