ive got a 02 raptor 660 LRD full pipe, stage 2 jet and stage 1 cam. front sprocket has been droped a tooth. i ran a row of quads the other day ( 2 polaris 500 3 raptor 700 2 honda 450's and one yamaha 450) i was able to run every bike out there consistantly. the 700's were closest behind me but i would pull pretty hard on the top end.

 

i have a couple of buddys w/ raptors. one a 700r with full hmf and powercommander (it was running snows). one with a showroom stock 05 660 with less than 50 hrs on it. we raced them on hard pack dirt and the 660 was continually 1- 11/2 bikes behind. i was extremely impressed with the 660's performance. it was even pulling back from half track. it got left off the line spinning. both bikes were getting launched in 2nd.