You cant beat a 600 stock thats it. A guy down the street raced his buddies 2002 R6(not me, but same bike). He was in his 2001 Z06 with a T76 turbo on there at about 500HP and they said it was a close race. Its all about weight to power. A 500 lb bike with 120hp has a better w/p ratio than a 3000lb car with 500hp.