Im about to replace both sprockets and my chain on a 02 Raptor 660, I would like to make some adjustments to boost the low end torque, without sacrificing too much top end. I was wondering about which sprocket to add teeth to, or if I needed less teeth on one or both. I do mostly tight trail riding with some steep hills so the more bottom end torque the better. Any help would be great.

 

go 1 tooth smaller on front sprocket and you should be good, it will be a little snappier after usin smaller front sprocket.

 

91 you hit it, 1 tooth on the front is same as three on the back and should be noticable. If not enough go 2, the nice thing with the front is there cheaper and if you do your chain right you prolly could use the same chain on both sprockets.