I'm thinking about dropping a few teeth in my 2008 Renegade X 800r. I can get 176 km/h out of her with stock gearing which is way more then enough for me, but i want a little more bottom end power. What size sprocket(s) should I get? Should I just loose a few teeth on top, gain teeth on the bottom, or both? Will I need a new chain if I do this? I have never done this before. Is it worth it? And where could I get the new sprocket(s)?