Auto Decomp WR426F

A friend of mine has a 2004 WR450F cam, can I install this cam in my WR426 2001? I read at thumperfaq that the pitch of the tooth and chain are different. Is that true? If so I understand that the 426F cannot be auto-decompressed?

Many have done it and had no problems for over a year now!

Check the YZ forum they have a pinned post at the top of the first page discussing it.:cry:

It's the best mod that you will ever make to your WR!!

Don't konw if the 04 will work,I think that I used a 03 and now

I will not part with the bike, it's a keeper.:cry: :cry: :cry: :cry:

Mines is a 01 too.

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