Originally Posted by newcastleadam
Going to take the piston and cylinder to a machine shop and get them spec'd, then either go with new rings or a 1.0mm over piston.
Your proposed course is probably better, but . . . ain't there a 300 cc option with another Kawasaki model piston and pin?
An aftermarket specialist speed shop specializes in Mojaves and KLR250s (http://www.cycleworksracing.net/mojave.htm
); sells several kit options from .020 and .040 oversize pistons to combos from 280 cc to 345 cc,.
No personal experience with the firm or its products, but intrigued!