Clutch problem?

2 replies to this topic
  • djracerd8769

Posted April 05, 2015 - 06:32 AM


Hello, I have a question of course lol

I got a 2004 yz 450f and had to replace the head gaskets because it was dumping antifreeze into the cylinder and I guessing the oil too since it was milky and foamy, or maybe that was from the race gas the previous owner ran in the bike.

Anyways! When I took a road detour ;-) I noticed that when you pin it in 3rd and 4th gear (its 4 speed tranny) that it feels like the clutch slips and catches? Its a jerking feeling.

But when starting off the clutch feels smooth and strong. So I'm at a loss, is this a clutch issue or gear problem or what's going on!?
The bike is mostly stock other than a slip on and cosmetics.

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

Posted April 05, 2015 - 06:53 AM


If this is a jerking that is dependent on how much load you put on it, and that occurs only in 4th, something like a chain jumping teeth on the sprocket, the problem is your transmission.  The locking lugs, or "dogs" on the sides of the 3rd and 4th gear pinions (on the main shaft) are worn rounded, and are forcing the gears away from each other under a load instead of holding together.  This will also have damaged the forward (#2) shift fork.

  • djracerd8769

Posted April 05, 2015 - 07:25 AM


I'm guessing its not good too ride it like that... That's great!

Related Content


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
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

Yamaha YZ450F 2017 by Chris.GVS

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

Megabomb Fitment by 288yz450

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

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.