G'day fellas. I picked up a couple of +040 rings that are supposed to fit a 125cc on a Victa Special I'm rebuilding. The anti rotation pins on the old piston grooves are round/semi-circular, but the rings I've bought have square cut notches. They look like they may just fit, but I doubt they will provide adequate compression. My question is, are there multiple styles of rings for Victa 125cc engines, and will the rings I have work with the piston I have?
Cheers