426 Timing question

1 reply to this topic
  • bfogelma

Posted November 14, 2011 - 09:20 AM


So i have a 01 YZ426 with the baja designs light kit on it, so i put a WR flywheel on the bike. Now my understanding is that the TDC marks on the WR flywheel are not in the correct position in relation to YZ timing correct? When lined up where the flywheel said tdc i put a probe in the motor and the piston was not at its highest point... so i rotated it until it was and set my cam timing to that spot. Is this correct?

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

Posted November 14, 2011 - 09:52 AM


You did it in a correct manner, but I believe that you misread the flywheel. If you check it the way you did, then look at the flywheel and index mark in the case, I think you'll see that the mark farthest to the right on the flywheel is in fact aligned. The other two are a reference for ignition timing.

Related Content


Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 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.