Hello forum, I am happy to be part of this information forum on behalf of a crusty BSA owner/lover who has no access to cyberspace.
I/we hail from Healesville, Victoria, Australia. We are about 60 Kilometres east of Melbourne. The question is from my friend Taffy John. He has an iron head from a Road Rocket / Super Rocket, that he is trying to establish identification. His question is to do with the size difference of the inlet and outlet valves on the over standard size head. Is there a difinitive answer to this question regarding the size difference to the valves. I thank you, on Taffy's behalf, if there is someone who understands the question and can suppy the answer
Regards, Uglyfrank.