Having trouble understanding something.
I know stock 650 bore is 70...the top of the bore is just about 70 ( sorry non dial calipers )
the bottom however is just under and more about 69, now should'nt the wear of the cylinder make this the other way around ??
Here is a picture,,am I un aware of something ? The top almost looks like a sleeve comes up and stops as both sides are the same and there is no carbon build up.
or am I just really lost on this ?