why do racers put dirt bike motors in quads?

 

Dirt bike motors are tuned for more top end power, I suspect. Quads and utility quads like a Sportsman are made to work, plow snow, tow a trailer, last 10,000 miles, etc. It's like a 12,000 hp fuel dragster hemi motor only has to last 4 seconds, the hemi in my Dodge has 350,000 miles, but 11,600 less hp.

 

A lot of sport quads have dirt bike motors in them stock, like a lot of 450s.