you can drive it for aslong as you want...either till it pisses you off so much that it makes you cry yourself to sleep at night
or till you lose basically all drive together and can barely move
basically, try not flooring, use half throttle generously, and dont pick any fights with anyone because you want to keep the wear down to a minimum f you dont wanna be forking out soon
mine was slipping for months untill i could afford to do it
ofcourse if your seriously concerned you could also knock back to standard cos you have revo if i remember rightly.
none of the sponser could
help me much, mainly cos most of them are around 200-300mile trips
budget for £250-350 and you should be fine