yz 426 seized then no compression

1 reply to this topic
  • ktmhunt

Posted April 03, 2013 - 10:39 AM


Ok so I have a friend who has a yz426 it seized then he changed the oil and push started it. IT turned over but it did not start now there is a knocking noise. And yesterday when i went over there the compression was real low. You could now turn it over by hand.
so any tips on how to track down this problem.

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

Posted April 03, 2013 - 10:49 AM


Start tearing it down and check things as you go. Top first, but check the cam timing. If you find it off, you can try resetting it, but with the noise and the fact that it seized, it's not likely to fix things.

Related Content


Michigan Motocross Tires by 288yz450

Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply

First Hare scramble tips by dhend8

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

yz400f throttle bog by yz400fmaniac

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • * * * * *
  • Hot  28 replies

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  106 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.