2004 yz 450 head question

2 replies to this topic
  • Gallagher

Posted April 15, 2011 - 09:01 PM


Just putting together a "new to me" 2004 yz 450 that I bought in pieces. Cylinder head is missing a bolt on the right side of the cylinder, just above the front right cylinder head bolt, above the exhaust....looks to be a 6mm bolt coming off of the right side exhaust port. The bolt is horizontal, going into the head from right to left....I have pic, couldn't figure out how to DL it???

I have gone through my manual front to back twice and scoured the internet and I don't see a reference to this bolt.....can anybody help with this? hoping to go for a first ride this weekend!

Thanks in advance!


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

Posted April 16, 2011 - 04:00 PM


If it's #8 in this picture:


...it's the bolt that used to hold the manual decompression shaft in place back in the old days. In yours, it just fills up the hole.

It's an M6x1.0 with a copper washer.

  • Gallagher

Posted April 18, 2011 - 10:20 AM


Awesome, thanks very much!

Related Content


Help with 2000 yz426 by weekend woods racer

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  36 replies

yz400f throttle bog by yz400fmaniac

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • * * * * *
  • Hot  28 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 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

YZ450F 03 Sparks driving me crazy by SirAttard

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