So when I bought this bike the guy had told me it was a 525 stroker with a +3 stroke. So doing the math it would make it a 99mm cylinder with the +3 stroke but after measuring the cylinder and piston, it seems to be a 101. I have never measure a cylinder or piston like this before so let me know if I am doing it right. What bore size do you think it is? The first picture is the top of the cylinder and the second one is at the skirt. Then the third and fourth is obviously the piston.