thanks rick25. i am not going with stock gearing. I am going with a sprocket specialist 46t rear and 15t front. i thought for easier wheelies you want -1 up front.
and prizmp, the sprocket is not bent the wrong way. i took it off and compared it with a brand new one, and with close inspection, they are actually worn SO MUCH on the drive side that they just appeared to have bent the wrong way.
i am guessing that the reason that the sprocket is worn SO BAD in such a short mileage is because 1. it is a 520 setup, 2. the sprockets i have on the bike are 15t up front and 48t in the rear. the acceleration with that ratio is just :rock INSANE :rock and that may have contributed to the equally insane rate of wear
i've heard of stories of chain breaking and damaging engine case. i just want to be safe so i am going back to 530 setup and getting a high quality chain.