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Tuning: Four stroke Engines


MoSSaN69
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Performance Tuning Motorcycle Engines: The Four Stroke

The objective of tuning is to improve the volumetric efficiency of the engine. In other words, the engine will, after tuning, produce more power from the same displacement. For example, a 1000-cc engine may produce 125 hp in stock form and 175 hp after race tuning. It is very important to understand that tuning a single item (fitting bigger carbs, for example) may not in itself improve performance but will, used in harmony with other modifications, produce the required results. Also, fitting aftermarket tuning parts may not result in the hp increase the individual items claim to provide. For example, 10 items each claiming a 10 hp increase may not give a total of 100 extra horse power, as they may not work in harmony (i.e., in tune) with each other.

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