Posted by Mike Johnson on August 14, 2001 at 17:20:41:
In Reply to: Valve Guides revisited posted by Simon McCauley on August 13, 2001 at 20:05:20:
The thread on 60's besson valve guides is 7BA (I think that stands for British Association)But new brass guides might not solve the problem as the slot is probably worn. Best bet is have your repair man re thread your pistons to accept B&M nylon guides.