1973 Kawasaki F11. I need a piston and rings... really bad! I bought a .50 (stamped on top) piston (NOS Kawasaki 13029-055) from ebay, but when I got it, it was the same size as the piston I took out, which has 1.0 stamped on it. Both mic to .68, which is the stock bore! The cylinder also mics to .68. So why does the stock piston measure the same as the overbore one? Could it be a factory stamping error?
I found a Wiseco piston on ebay, part number 153-P6, but that is .60 over and that is quite a bore...
Then there is this:
When I talked to the guy selling them, he said that they are NOS in the boxes, and the boxes say .40 over, but the pistons are stamped 1.0 on top. 1.0 is standard bore, right?
Boy am I lost!