Yeah, what i was trying to elude to is that the listed CR for the pistons mean pretty much nothing, there's too many variables, and you have to measure to know for sure.
Yamaha lists the generic SCR for the engine at 9.1, but actual is probably more like 8.6-8.8, they round numbers, just like with displacement.
Sure, as long as they have blanks, most cam grinders will grind you a cam, but can check with Cuervo Racing, Web Cams, HPS, Megacycle, and the likes. I'm kind of newly getting back into bikes, so not familiar with the manufacturers involved, but will look into it
I see a lot of cams for the V-Star 950 & 1100, so would have to research the engine families and see what is interchangeable. If they are compatible, might be able to do a jug, piston, rod upgrade for a 'big bore' type upgrade, and go to 1100.
Was thinking about a 1300 but would have to run a radiator. Would rather make parts for the 950 due to the fact that there are more out there. Will call web about the cams. Thanks