Hi,
I'm currently rebuilding the engine in a 76 CB750 supersport f1.
The cam that's installed in the engine is in bad shape, so I'm going to exchange it for one of the other cams that i got when i bought the bike. I have 2 cams to choose from, one is marked "R2" the other is R9.these where the only markings i could find on the cams.
The R9 cam looks like it has a much more aggressive profile than the R2.
The PO told me that the R9 cam was a aftermarket performance cam, but i have my doubts. could this be a f2 cam? and would it fit in my 76 f1 engine?.
thanks in advance.
-Frode Johansen