2003 WR450F Cylinder Head Replacement

Just to make absolutely sure, can I replace a 2003 WR450F head with a 2005 YZ450F head? I understand the exhaust cam differences. Will install the WR cams in the new head. Thanks

Well, the 03 WR and 05 YZ heads are different p/n's, but the WR and YZ used the same head in '03. I'm not sure what the change was, but it may just be that the newer heads don't have the hole above the exhaust port for manual compression release, which doesn't need to be there anyway.

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