LCampbell
New member
I have a left cylinder head that is used on a custom application that I am trying to identify because I may have to replace it. The part #'s on the head are 1 251 595 9. Intake valve dia. = 38mm, Exh. = 34mm. It's also possible that the valve sizes are not stock. I'm thinking it might be off of a R50/5 but my old part # book doesn't go back that far.