how to upgrade engine motorcycles perfomer?

Question

also can you explain about combustion internal engine.

Answer 1

Basically, internal combustion engines take a mixture of fuel and air, compress it, ignite it and the resulting pressure increase from the burning fuel-air mix turns the rear wheel by means of a series of recipricating and rotating shafts and gears. To run and make power, an engine needs four things; air, fuel, compression and ignition. A weakness or defecit in any one of those restricts the overall power output. Increasing those four tend to make more power, but without being too technical, the increase in one must be in concert with the others. For example, increasing the compression ratio usually required a more intense spark (ignition) to ignite the fuel and air mixture. Increasing the air entering the engine also requires increasing the fuel. Modifying components to allow an increase in the air-fuel entering the engine will not increase power unless exhaust modifications are made to allow more exhaust (burned air-fuel) to exit.

Like it or not, the easiest and least expensive way to increase the performance of a motorcycle is to buy a different one with a bigger engine. Like they say, there ain't no replacement for displacement. Power produced through displacement is always smooth and easy to control. Spending mega bucks modifying a smaller displacement engine to produce the same power as a larger engine invariabaly results in peaky power output. In other words, it may produce the same amount of power at high engine rpms (revolutions per minute) as the bigger engine, but power output will be reduced at lower rpms (where you will do most of your riding) from the stock output and be much lower than the mildly tuned big engine at the same rpm. The law of diminishing returns especially applies to souping up engines. The first $500 spent will produce the greatest horsepower increases while the last $500 will produce the least. Making it more difficult is that many of today's sport bikes are highly tuned from the factory and there isn't a lot of room for improvement without spending thousands of dollars for slight power increases. If you want to soup up an engine, get a Harley. You can increase power output by 40% with relatively minor modifications and have a Harley that'll embarrass many Jap bikes (I ride Jap bikes) and still be very streetable. You'd have to mortgage the farm to increase a Jap sportbike's output by 40% and you'd end up with something that would be miserable to operate anywhere other than the racetrack.