On Sun, 27 Jun 2010 14:27:06 +0000 (UTC), Chief Two Eagles
wrote:

It's not worth taking in for repair as the labour would cost more then
the thing is worth.

Hone the cylinder. Replace piston and rings to match the new diameter.
Might need to re-seat the valves using lap compound. Have to admit I've
never had a really small 4 stroke apart but it should follow the agenda
of larger 4 strokes.

A little extreme I think. It may need just a fuel / air mixture
adjustment.