250-500cc Top end specs?

I have tore my bike apart for the first time. 2nd season in the bag. Bike was running great but the power valve was sticking sometimes. I am going to put a new piston and rings in wether it needs it or not, but want to check the specs on things just to know how it wore. When you take the rings off of piston and place them in the cylinder to check ring gap what is the tolerance? What is the piston diameter spec? The cylinder diameter tolerance?

Cylinder looks great, piston looks great, head, rod play all seem perfect. I only tore it completely down to really clean the power valve good, replace some gaskets, and add one to the reed valve cage. For piece of mind I will put in a new piston and rings.

if you have the owners manual they list that info
did you happen the measure the bottom gasket as that's handy for setting the height in reassembly
good maintenance is important in racing but also just riding,,, they are hard to push on flat ground

Specs from 2011 service manual:

Ring end gap (maximum): 0.6mm (0.025 inch)
Ring axial play in piston groove: 0.12mm (0.005 inch)

Note that the manual specifically states to measure end gap at the bottom of the cylinder, where it has the smallest diameter.

Spec for cylinder ovalization is approximately 0.001 inches.

2premo, lost ya on the height setting. What height do you measure? I dont have a service manual, just the flash drive and book that came with it. Which dont show much.

Kyle Tarry, yeah I am glad you mentioned the part about the bottom, same as other bikes I have done just forgot about that.

Thanks for replying guys.

the height setting is for the head squish, in another way of putting is piston clearance to the head

Okay, didnt get what you meant at first. Thanks