help please, manual decompression release


5 replies to this topic
  • fsae_2011

Posted May 04, 2011 - 05:08 PM

#1

Greetings,

can anyone please measure these dimensions if they happen to have this part handy. if someone could help give us the dimensions, it would greatly help us as we could then make one ourselves.

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  • salemonkey

Posted May 04, 2011 - 09:07 PM

#2

if you have a cnc machine and plan on doing one yourself i would rather have one in my hand to measure then hope someone on the internet measures it exactly right. for 30$ you can get a new one here.

http://www.serviceya...amaha-oem-parts

search under camshaft chain. number 16 decompresion assembly

  • Birdy426

Posted May 04, 2011 - 10:18 PM

#3

or better yet, get hotcams to donate an auto-decompression camshaft to your project, and then just plug the hole that came out of with an 18mm freeze plug!

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  • Birdy426

Posted May 04, 2011 - 10:19 PM

#4

or better yet, get hotcams to donate an auto-decompression camshaft to your project, and then just plug the hole that came out of with an 18mm freeze plug!


or get your local Yamaha dealer to donate a stock YZ450F cam, as it also has the auto decompression feature.

  • fsae_2011

Posted May 05, 2011 - 06:54 AM

#5

Thanks for all of the replies. The reason we are going for the manual release is simply due to the issues we ve been having with the automatic one on the cam. We keep getting stuck on the compression stoke as we've bored and stroked to 502 and upped compression to 13:1, and the starter motor doesn't seem to be able to handle it

  • fsae_2011

Posted May 05, 2011 - 06:55 AM

#6

Also every dealer we check is sold out of them and we need this thing by friday. We have all the machines to make it, just need some dimensions





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