In dirt bike racing, two-stroke and four-stroke engines have their own unique advantages. What's the difference, and which ...

Never underestimate the power of a well-stocked junk bin. Along with a TIG welder and mechanical ingenuity bordering on genius-level, all of which come to bear on this fridge compressor to four-stroke ...

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Have you ever wondered why you need to add oil to your chainsaw’s fuel supply? Or why some dirt bikes have a higher pitched exhaust note than others? We’ve all been burdened with yard work or been ...

ProX takes you through the major parts of rebuilding a four-stroke top end, complete with step-by-step guides for each task along the way! In the simple two-stroke days of riding and racing, ...

There are two basic differences between 2 stroke and 4 stroke motors. One has to do with how many strokes it takes a piston to complete an engine cycle (more on that below). The other has to do with ...