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
tdd6405

yz450f-wr450 differences????

9 posts in this topic

hey, besides cam timing, and the wr being a 5 speed, is there any more differences between the yzf motor and the wr?

and the wr's also have an electric start and kick don't they?

Share this post


Link to post
Share on other sites

Pipe is different. Lots of lights. About 40lbs. And some other visual stuff. I am not really sure of all of it.

Share this post


Link to post
Share on other sites

Where to begin.... The WR has a wide ratio 5-speed, YZ is a close-ratio 4 speed. WR has 18 inch rear wheel , YZ has 19 inch. The timing is different, the jetting different (due to the timing and the pipe...motors are set up differently). WR has a heavier flywheel, too, I believe, plus a stator capable of running lights. The WR's suspension is a little softer and more trail friendly, while the YZ's is more configured for the hard hitting mx type obstacles. I believe the radiators are the same, but the WR has a collection bottle for the coolant for when it heats up with slow speed trail riding. And yes, electric start for the WR... I'm sure there are more subtle differences, but these are the largest ones I could think of.

Share this post


Link to post
Share on other sites

i know this.. my question is differences in the motor. if you change the wr timing to yz specs, and use a yz exhaust , and do those free mods, will the wr run the same as the yz, but with 5 speed instead of 4?

im only asking cuz i want to put one of the motors in my quad. so i dont care about the chassis, im just worried about motor vs. motor

Share this post


Link to post
Share on other sites

NO. You will also need to replace the WR cam with a YZ cam. The WR comes very tame. It will require some work to make it feel like a YZ. You can check the posts on the WR side to see all of the work that these guys have done to make their WRs feel like a YZ.

Share this post


Link to post
Share on other sites

okay well thats okay to me cuz i have an 03 yz450 exhaust cam already :thumbsup: is the intake different also? i tried a search but didnt see anything

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