i only ran 2 1/2 tanks, but gears look just brand new, also i had an xp for a couple of weeks and i ragged the hell out of it and no gear problem, i honestly think gear problems are related to wrong mesh adjustment and/or deformed cluthbells, i've seen a friend go through gears and clutch spring like there was no tomorrow and his problem seemed to be the clutchbell was all warped and all stripped on the inside, clutchbell and clutch are my next upgrade