Wow, that must be correct! I've been used a very small Vertex, so small, that it would swing back and forth when pressed on the skirt by finger! After it finally felt apart i installed a kit of Namura. It doesn't swing, and the clearance seems tiny, but....... It's written 66.32 on the top of it, while my bore is 66.4!!!!! And the cylinder is rather old!!! (The previous owner seems had been using Wiseco, replacement diameter C)
A fella suggested just to ride harder, so the pisston gets hotter and the huge clearance disappears. Says, it's a preferrence;small pistons get skirt falling apart, while big ones make overheat or that kind of thing. What do you think?
How big is the proper clearance???