I've been thinking of switching from a 14T front drive sprocket to a 13T front sprocket for more usable low end power. I'm new to riding and just rode my friends 2000 yz426f yesterday. His has a weighted flywheel and he put a 13T sprocket on. It seemed to have more manageable power than mine. Like I said, I am new to riding so any advice on this bike in general is welcomed! Thanks!