fly wheel weight and timing

4 replies to this topic
  • eluke

Posted June 17, 2010 - 06:32 AM


Does adding a heavy flywheel to an 02 yz 426 change the timing at all? Can I just change the flywheel and ride the woods? :thumbsup: or do I have to change anything else?

Kind Regards,


  • milk

Posted June 17, 2010 - 07:43 AM


shouldn't unless you fudge something up while putting it on but even that would be hard to do :\

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted June 17, 2010 - 07:47 AM


Doesn't alter the timing at all unless you dislodge the woodruff key in the process. Pop the old one off, and the new one on.

However, a lot of the weighted flywheels and add-on weights for the 426 and early 450's do cover up the TDC marks on the flywheel, which makes it necessary to probe for TDC through the spark plug hole should it be necessary to find it (like for cam timing).

  • eluke

Posted June 17, 2010 - 09:30 AM


thanks guys....

I am getting a new heavier wheel instead of just the weight..... should help out quite a bit on the tech trails near my place and since I am far from even competent on the track:cripple: the lack of big hit won't make a difference to me.....


  • grayracer513

Posted June 17, 2010 - 09:34 AM


It won't really soften the hit as much as you think. Just takes the "edge" off, improves traction, and helps the engine run more smoothly at low speeds.

Related Content


First Hare scramble tips by dhend8

Dirt Bike   General Dirt Bike Forums   General Dirt Bike Discussion
  • Hot  33 replies

Michigan Motocross Tires by 288yz450

Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply

Need help by Goforaride

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  68 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

Is the 2016 GYTR Yamaha YZ450F too fast? by Fryboy

Dirt Bike   Special Interest Forums   Pro Racing
  • * - - - -
  • Hot  241 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.