So, after searching around on TT, it appears that there are 2 methods of sealing off the decompression shaft when converting to the auto-decompression exhaust cam.
The 2 methods are to get a "freeze plug" from an auto parts store, or to buy a decompression plug like this one in the TT store https://www.thumpert...=search_results . This plug does not show that it fits the 2001 WR/YZ426, but does it? Would the #15 plug from a 2003 WR450 fit the same hole? https://www.thumpert...003&model=28790
Regardless of which method is used, would I need to have the oil seal in place? #15 on the diagram https://www.thumpert...001&model=28895
- Just read on ThumperFAQ (http://www.thumperfaq.com/) and it sounds like the oil seal is not necessary. Would still like confirmation.
If I ever sell the bike (unlikely) and the new owner wants to go back to manual decompression for some reason, can freeze plugs be removed? I have never heard of them until today. Is there any worry about the freeze plug popping out. That scares me to be honest, and I'd rather spend $20 to have something that physically locks in place, vs a $1 cheap fix.
- ThumperFAQ stated "The 450F cam gear has a different tooth pitch, even though the tooth count is the same. the new cam will work for a while, but the chain and gear will ahve accelerated wear." Sounds like Hotcams is the answer.
Edited by Pooley, August 11, 2014 - 02:01 PM.