2006 Valve Timing

2 replies to this topic
  • Wiz636

Posted November 15, 2007 - 09:05 AM


Putting my motor back together and when I installed the camshafts/cam chain with the timing marks on the cams level with the top of the cylinder head I counted 13 pins on the chain between the top marks on the camshaft. The illustration in the manual shows 14 pins. If I adjust it to a 14 pins then the timing marks do not line up as well with the top of the cylinder head...which way is correct?

You would think this is something that I would have taken note of on disassembly, huh? :thumbsup:

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

Posted November 15, 2007 - 09:22 AM


You don't time cams by counting the pins between the top marks, unless doing an installation of a 450 cam in a 426. You have to in that case because the marks on the cam are for a different head.

Line up the crank at TDC, set the exhaust cam in place, draw the front side of the chain tight, and line up the timing marks (one at "12:00", and one lined up with the head at "9:00"). Then set the intake, draw the top of the chain tight and line up the marks (one at "12:00" and one lined up with the head at "3:00"). Note: earlier intake cams will have 3 marks; "E", a punch at "12:00", and "I". With this sprocket, align the "I" with the head at "3:00"

Then carefully move the engine back to TDC if necessary, press in on the back of the chain and recheck everything. Check it again after the tensioner is in place.

The pin count on a 450, BTW, should be 13.

  • Wiz636

Posted November 15, 2007 - 09:26 AM


Thanks Gray...it seemed correct to me until I counted the pins on the diagram in the manual, then I started to second guess myself.

Related Content


Megabomb Fitment by 288yz450

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

Yamaha YZ450F 2017 by Chris.GVS

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

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies

BIGBORE FOR YZ450F 2006? by Taattie94

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

The "going back to the other darkside" adventure... by Monk

Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 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.