2)Use a good air filter to keep dirt of your engine and clean it often
3)Do not over-lean your engine.
4)Do not run your engine with little or no load. Don't rev up the engine to full throttle when the wheels are off the ground.
5)Do not overheat the engine.
6)Do not use a fuel with a low oil content.
7)Do not use a fuel with a nitromethane (also called nitro) content of over 20%.
8)Do not scratch the piston or cylinder sleeve. Use a crankshaft locking tool when removing or re-installing the clutch or flywheel.
9)Do not use silicone sealer on the engine joints. Silicone sealer contains acetic acid which is corrosive to the inside of your engine.
10)Do not allow water inside of your engine. Store your engine inside the house, temperature extremes can cause condensation inside the engine.