bike going bad

2 replies to this topic
  • jonnyrocket56

Posted October 22, 2005 - 11:55 AM


I got this used 02 426 and the bike has a brand new top end but the bike backfire whenever you back off the throttle. so what would you guys do to fix this problem?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Reyndogg

Posted October 22, 2005 - 11:58 AM


proper jetting...if you cant do it, pay someone to tune it on a dyno (my method).

  • ovrrdrive

Posted October 22, 2005 - 06:39 PM


Start by adjusting the pilot (fuel) screw then if that doesn't fix it by 2.5-3 turns out go up one size on the pilot jet.

Related Content


Should I buy this bike? help....... by Numsa Hul

Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

Wilson the Blue Privateer by jetfuel

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 replies

Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.