Model(s) covered: 2002 Yamaha YZ 125, 2002 Yamaha YZ 250 F
Which engine type makes a better motocross motor?
There's a rumbling in the air around motocross tracks, but it's not the kind of thunder created by nature. It's the baritone rasp of a high-po 4-stroke engine kicking roost at the pre-mix gang on their 2-strokes.
It's a revolution of sorts, where the dirty, mosquito-toned 2-strokes are clinging to the last vestige of their relevance in the face of governmental regulations and new 4-stroke designs. If you missed it, here is our detailed description of the rise and fall of 2-strokes.
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