HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
WALKINGWOUNDED

04/07 450 Engine Case Fitment

4 posts in this topic

My freind has an 07 YZ450. We're riding this weekend when he landed a jumped and the rear hub exploded. The chain packed in around the front sprocket and it destroyed the left case half. I found an 04 left case half on ebay, and needed to know if 04 is the same as an 07. If not what years will interchange. I tried the search option to no avail. Any info is appreciated.

Share this post


Link to post
Share on other sites

To start with, no, the '03-'05 YZ450 crankcase is not interchangeable with any '06-'09 model, or anything else, for that matter.

Secondly, one should NEVER mix crankcases from another set. They are manufactured and sold in pairs only because the shaft bores are machined with the cases bolted together to ensure absolute concentricity. They should not be mixed under any circumstance.

As to which cases do interchange, '06-'09 YZ450 are a certain direct fit, and as far as I know, the cases from a '07-'09 WR450 can also be used, but don't take that as hard info.

Share this post


Link to post
Share on other sites

Thanks for the info. He's depressed right know so I'm getting the ball rolling. Once he gets the parts I'll help him with the work. It also took out his swing arm too. Thanks again for the info.

Share this post


Link to post
Share on other sites

Hey Monty,I'm feeling the same blues. My boy-Brad was riding at Angleton MX on his YZ450 yesterday,and locked up his transmission after landing from a jump.I pulled the motor taday,and will have to split the cases.Let me know if your buddy decides to buy a complete motor,as I will need a transmission I suppose.His is an 07 450.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0