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By the staff of Dirt Wheels FOUR-STROKES FOR DUMMIES. Power is something humankind craves, but off-road riders lust for it entirely. We want engines that push more ponies and rocket our wheeled steeds onward with an epic forcefulness you won’t feel elsewhere. There are a variety of methods that will let your machine gain more power, but some come at a cost. We filled this article with all the info you need to figure out what will work for your horsepower needs with some help from Duncan Racing International.…