Quote:
Originally Posted by RiujinZero
My 2 cents...
Most gasoline engines can't handle much more than double their stock horsepower assuming a volumetric efficiency of 70-80% with a maximum volumetric efficiency of about 140-160% before things start to blow and give.
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I could cite you a lot of cars that make well over double their factory HP. Supras are rated for 320hp, but can make over 700rwhp with the stock bottom end. If the engine is designed for power, it can handle it.
Where the 250 is concerned, I do agree that it's an econo bike and not really designed to take a lot of HP.