I have changed the holed piston with a 'just as new' piston from my extra engine, i Think this engine had a piston change not long ago, since the pistons were almost new... I also noticed that the Crank too was in far better condition Than the one in the running engine. Next winther i Will change the complete engine with the donor.
The little piston next to the Big one, is off a 23ccm RC Racing engine.
The Right buttom cylinder base seal, is the old type 2 port Steel cylinder. The left is the one i modified to fit the late 'euro spec' 4-port cylinder with nikasil plated barrels.
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