I've got -1 front, + 2 rear and it works great so far. My track of choice is Blackhawk Farms which is pretty short. I don't get out of 5th gear on the front straight at 150 mph. I've only had it at the track a couple times, as it was my streetbike last season. On the street it was perfect too because you can actually use 6th gear. Stock, 6th is just an overdrive on the interstate. I bought it to convert it to track duty, which is about 75% complete right now, but I didn't mind cruising at a little higher rpm. My trackbike before this was a 600 (Triumph Daytona 675) so it was a higher revving bike anyways. I'll change the front sprocket back to stock for Road America this year though.