i am still running the stock gears and i recently got over a gallon and a half out of stock losi clutch bearings. Main thing is everything that has been mentioned in this thread already. Gear mesh a little looser than the norm, make shure that the play is not too much on the shaft and last be shure to clean the carbon dust every so often out of the bell and clutch set up (if still running 2al/2carbon)