2 strokes will always be better and faster. put it this way, im sure if you matched up the quadzilla vs. a raptor, im sure the quadzilla would kick its butt. ive also seen cr 80's kick other 4 stroke quads butts. especially in a flat line drag. but in a hill drag, the 4-stroke quads come out on top. reason being the weight helps them with traction.

you also gotta think here people. what is the fastest atv or atc ever made? of course it was the tiger 500. its a 3 wheeler 500 2 stroke. its the fastest stock atv ever made. so obveousely, 2-strokes are the best.