Top End Inspection?

[rcers]

I just took the top end apart on my y2k 300mxc for a off-season inspection.After 2 yrs off play riding,the piston,rings and cylinder look and measure perfect!!!Virtually no wear at all!!!
Should you lightly hone the cylinder walls on a plated cylinder before you re-assemble it and if so what type of hone?
I forgot to label the rings top and bottom,since they are identical rings does it matter that I may not get them back in the original grooves?
Is there a top or bottom side to each ring?I dont see any markings on the faces but one side is really shiney like plating and the other side is dull.
I talked to STEAHLY when modifying a KX85 for woods riding and he told me that you can shift power curve to favor the bottom end of any 2 stroke engine by spacing the pipe farther away from the cylinder.I made a .200" spacer for the 85 pipe and it worked great.Adding a 3 or 4 more exhaust flange gaskets on my 300 would effectivly space my pipe .150"-.200" farther away from the cylinder,would this have the same effect on the 300 as it did on the KX85?
THANKS
rcers

 

[Jaybird]

Be certain that you measure the jug in several places to make sure it's within spec everywhere. Be certain to check ring-end-gap. I would change out the rings at this point no matter what. Check the gap on the new rings as well.
On the honing, I like Scotch-Brite pads and elbow grease.

 

[Bish]

Ditto on scotchbrite pads for cleaning.

Also would suggest replacing ring regardless at this point. I would re-ring every year and replace piston after second or third year. I too was amazed at how well the internals wore.