It has a soft, sintered piston so it wears out quick. If you are particularly fond of the motor, you could have it chromed. Then you only have to worry about other parts wearing out.

I have a lightning Bolt Mccoy and it's got plenty of poop even after plenty of flying, but it could go south too. Also, they are great engines to cook the piston. Oven on highest mode, stick the Piston only into the oven for an hour, let cool by itself. The piston has now grown a bit and can bring back your compression. Little lapping to fit may be necesarry. Don't worry, it'll probably still wear out.

Definatly nothing less than 28% all castor oil on this engine. That will help.