Two-stroke engines only have one cycle to produce power. This single cycle can be divided into two strokes. The air-fuel mixture goes in the combustion chamber with the piston just past the top dead center, the highest point of travel of the piston. The air-fuel mixture explodes, which begins the power stroke. The exhaust gases expand and this rise in pressure forces the piston down. As the piston travels down the sleeve, the crankcase is covered in an air-fuel mixture. The second stroke begins as the piston starts to move up into the sleeve. This upward movement seals the intake ports and then blocks the exhaust port. The combustion chamber now starts to become pressurized as the piston travels higher into the sleeve. As the piston approaches the top, the mixture's ignition point begins to be lowered until the heat from the glow plug initiates combustion and the process begins anew.Nitro cars run off a mixture of methanol, nitro methane (CH3NO2) and castor or synthetic oil. This mixture is highly combustible and burns similar to a diesel motor rather than a gas engine. The fuel is easily made at home or can be purchased from most hobby stores for about $10 per quart. RC fuels also are susceptible to moisture contamination just like gasoline.All 2-stroke RC motors are built with basically the same parts. A carburetor, piston, crankcase, bearings, connecting rod, air filter and about half a dozen small connectors. Of all these parts, only three actually move. This simplistic design ensures that routine maintenance is relatively easy and straight forward.There are tons of possible upgrades for RC motors just as there are with real car motors. Aftermarket parts are machined from aluminum, which makes them lighter; laser cut, which makes them more precise, and mass produced, which makes them cheaper and easier to find. Every part from carburetor to connecting rod can be replaced or upgraded to a better part. Some motors even have power upgrades such as external turbo chargers available. While these motors are small and compact, they are capable of producing 2 to 3 horsepower, about the same as a regular gas-powered lawnmower.Make sure that after every use, the motor and air filter are cleaned of all the dirt and grime that builds up on them. A clogged air filter is a good way to starve your motor of air and cause internal temperatures to rise to a catastrophic level. Clean the carburetor and also add three drops of oil to the piston. This is all the maintenance that you will need to preform on a regular basis. http://lngram1217.spruz.com/