Hi all. just bought the bike in March, I have put a 1000km thus far. My speedometer is out 5 % on the fast side, so I have to add 5% to my speedometer reading to drive at the desired speed, for example, if I want to do 60 I have my speedo has to read 63. I thought it would be an easy fix, I'll change the rear sprocket and drop about 3 teeth. so I did, I went from the stock 46 tooth to a 43 took a couple of links out of the chain, everything went smooth until I drove it with my GPS. I was thinking the 2 would be fairly close but to my surprise, the speedo is out 5 % it did not change the speedo at all. the only thing that would make sense to me is the speed sensor is getting its reading from the rear ABS sensor. everything I've read says if you change your gear you change your speedometer. back to looking at a speedo healer, I guess. wonder when they mad the change?