E35 or (post war) ET35

Robert Watson

Well Known and Active Forum User
VOC Member
Can someone tell me the OD of the face of the E35 that the rocker bears on. Post war they are ET35 Valve stem collars and are 3/4 in but the prewar ones are different. I am building a new set of heads for my A twin and doing the valves post war style but need these to be a bigger OD to suit the pre war rockers. I don't want to take a cylinder head apart to measure one at the moment!

Thanks

Robert
 

vibrac

Well Known and Active Forum User
VOC Member
Hi Robert
My post war one here measures .749 inches
1615886867238.png
 

delboy

Well Known and Active Forum User
VOC Member
Can someone tell me the OD of the face of the E35 that the rocker bears on. Post war they are ET35 Valve stem collars and are 3/4 in but the prewar ones are different. I am building a new set of heads for my A twin and doing the valves post war style but need these to be a bigger OD to suit the pre war rockers. I don't want to take a cylinder head apart to measure one at the moment!

Thanks

Robert
Hi Robert,
0.875" + -
Hope that helps.
Delboy.
 

Gene Nehring

Well Known and Active Forum User
VOC Member
Thanks Delboy, I suspected they were, but was just ordering stock to make some, so now I know for sure.

And Vibrac, as my old math teacher would have done across a math test when I was in High school

R T Q
My old teachers at boarding school added “squared” to the end of your equation.
 
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