Auto cam chain tensioner going back in too tight

2 replies to this topic
  • Twin-350

Posted November 19, 2013 - 08:07 PM


So I just re shimmed my cams and the auto tensioner seems to make the cam chain way too tight. Why is it doing this? I can't seem to find a reason why now it's making it sooooo tight

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Twin-350

Posted November 19, 2013 - 09:28 PM


Nvm I'm retarded. Didn't notice the little flat head inside.. Well I didn't realize that it wouldn't back out only get tighter, gotta tighten/loosen manually. Hope I didn't stretch my cam chain too much forcing it in.. Gawd it makes me cringe lol. Hope I got these shims right. I had to drop a bunch on the ex valves and I'm at the min clearance now.

  • slotracer577

Posted November 19, 2013 - 09:51 PM


If you got it screwed all the way down, do not run the bike. Take it back apart and put in a new cam chain. It will end badly if you don't.
When you removed the tensioner it extended all the way and if you reinstalled it that way you stretched the chain. I have seen the aftermath of such a mistake it involved bent valves and a damaged head.

Related Content


100 hrs on 2014 yz450f, shim valves or replace them? by ttr230rider6

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  79 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

YZ450F 03 Sparks driving me crazy by SirAttard

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 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.