Thanks Dave.
Interesting that Ross doesn't put the valve pocket diameter on that sheet. The racer that gave me the Ross box (insert?) above gave me his sheet also, and it doesn't show the dia on the sheet, just on the box info. FWIW, his 1.36 CH pistons weighed 574 grams.
This is what his flat top valve reliefs looked like.
Hi Jim, I have 4.5'' Venolia pistons to suit B1 originals. PM me with your phone number and I will send the pictures to your phone. I don't know how to send pictures on this site.
Your welcome to post my pictures on here when you receive them. cheers Rob.
