Ok so I'm putting this here because I don't know where to actually post this. So the 500 tops out for me (a 230 lb man) at about 95 mph, but this happens in 5th gear. Since there still seems to be some headroom (6th gear) I was thinking of changing the sprockets to gain some mechanical HP. I know the mpg will take a hit but the $6 a week fill up right now is not keeping me up at night. I wanted to play around with Gearing Commander but I don't have the info needed, eg primary drive ratio, final drive ratio, chain pitch and chain links. Any one have the info? Here's the URL to Gear Commander ( http://www.gearingcommander.com ) what do you guys think a good idea?