WR crank in a YZ

2 replies to this topic
  • jeffboyd47m

Posted May 29, 2008 - 05:07 AM


This question was asked in a forum from a Utah based website. I thought somebody here might be able to answer his question.Thanks in advance for any input.

I smoked the crank in my 03 yz450 I was puting it back together last nite. when I went to put the flywheel on, the shaft was to big. Come to find out it was for a WR450 if I get a WR flywheel will it all fit? I really do not want to split the cases again!!! Any help would be great.

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

Posted May 29, 2008 - 06:40 AM


Well, he has a problem. This information applies to '03-'05 YZ450's and '03 -'06 WR450 components:

The WR crank will fit in the YZ cases because the main bearing dimensions are the same between the two engines. However, as he has discovered, the left axle of the crank is different, and the flywheels will not interchange.

He cannot use the WR flywheel because that flywheel is "inside out", with the stator mounted in the outer cover, and the WR outer cover will not bolt onto the YZ crankcase.

He's going to have to remove the crank.

  • jeffboyd47m

Posted May 29, 2008 - 06:55 AM


Thanks for the input Gray. I will pass it along.

Related Content


Should I buy this bike? help....... by Numsa Hul

Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 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

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

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

BIGBORE FOR YZ450F 2006? by Taattie94

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.