I ran my maverick max this weekend against a rzr4 xp. The rzr has stage 2 alba engine kit, clutch kit and muzzy exhaust. We lined them up on pavement. The rzr jumped on me about a bike length off the start and pulled about another length by the time we got to 1/4 mile. My maverick max is completely stock. Not bad, considering the rzr was suppose to have close to an extra 20whp with all mods. I wanted to run it stock first for comparison. Can't wait to install my STM rage 3 and STM secondary and try him again. I guess I should add that I have a half windshield on my max and he didn't have a windshield.