08 yz450f engine knocking after rebuild


2 replies to this topic
  • sk8bd117

Posted April 03, 2014 - 05:58 PM

#1

I have a 08 yz450f that I just did the top end on. Everything including new piston, new sleeve, and new cam chain, and the gaskets.. During the first start, the engine had a clanky knocking noise. It sounds like a piston slap, like a metal on metal sound. The sounds builds with the throttle.



Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • seacraft69

Posted April 03, 2014 - 06:02 PM

#2

Did you remember to release the cam chain tensioner from the retracted position?

  • grayracer513

Posted April 03, 2014 - 08:53 PM

#3

New sleeve?  Did you actually have a new sleeve installed, or did you replace the cylinder and just calling it that?  What piston did you use, and what was the piston clearance?







Related Content

Forums
Photo

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews
Forums
Photo

Michigan Motocross Tires by 288yz450


Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
 
x

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.