Have a 2001 600xcsp and want to get more hole shot by buying a new gear. Don't want to buy a new chain and if I can do it with one gear that would be best for cost reasons. How many teeth do I have now? What should I buy? Teeth? Pitch? Not sure what pitch does so if someone can explain that I'd also appreciate it... and where can I buy it? I've heard drop a tooth or two on the top... is that right? How big a difference will this make?