Related, but not directly:
Get the Pro-x piston for the 200. Not to insult your intelligence or knowledge, but DO at the very least get the correct alpha designation for your engine.
If you order a piston from a kawi dealer, you have NO say as to what tolerance mark you get. It will probably be a 'B'. Why mess with unspecificity? (maybe I just made that word up...;) )
Both the cylinder and the head are marked with an alpha character: A,B,C,D..that I've seen, and Pro-X additionally makes an E&F plus a couple of even LARGER sizes.
From their website:
http://www.pro-x.com/eng/default.htm
..attached is a chart showing piston choices for the '89 200
I say 'at the very least' because the correct way to do it is to measure the cylinder and get the piston to fit your needs.
Note each piston 'size' is .01mm or (rounded) .0004". There is NO sense in putting together a 200 with .003" piston to cylinder clearance if you have the choice of a better fit.
If you have a damaged coating (and it's serious enough to warrant fixing) keep in mind that a bore and replate to oem spec cost is hardly less than EG's big bore (225cc) kit. And THAT comes with a port-to-fit for your needs!!
Any bore job will require telling the machinist what sort of gas you intend on using. Part of EG's paperwork includes that question. Be sure that's a known and understood issue. Compression ratios (and thus combustion pressures) go up considerably with a bore job and the head must be machined to 'match' the fuel you are going to use.