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Save_A_Tree_Eat_A_Beaver

Differences between YZ and WR head?

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My 07' needs a new head assembly and they are on backorder till March from what I am told. Will a head from a 06'-09 YZ450 work? What are the differences? Thanks.

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I am curious why you need a new head.

The '06-'07 YZ head will work with no problems. '08+ had a bigger head pipe flange. The only difference between the WR and YZ head is the AIS crap is deleted on the YZ.

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Sorry I can't answer the compatability question. I am curious why you need a new head.

This should answer your question... http://www.thumpertalk.com/forum/showthread.php?t=1031974&highlight=

The '06-'07 YZ head will work with no problems. '08+ had a bigger head pipe flange. The only difference between the WR and YZ head is the AIS crap is deleted on the YZ.

Great thanks man. Just the info I needed. Blocking off the AIS is one of the first mods anyway...

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