Summer is here and it's time to do the track replacement. Going to go with a 1.25 ripsaw and 8 tooth drivers for clearance. I am also going to put in my reverse kit. Here is the question. How much will the 8 tooth drivers effect my gearing? Since the reverse kit bottom gear is pretty much set, do I need to change the top gear to compensate for the 8 tooth drivers? I believe I have a 21 tooth top gear. Should I go to 19 or 20? Sled is a 2001 sxr 500.