sorry to hear youre having problems with your engine and gears,goodluck with your next engine. but like i said before,ive seen bikes with no engine at the store costing more than my bike and engine kit together. for another $100 you could have got a better engine kit from another website with a better gearbox. and gasbike said no refunds,how about the warranty on parts,did they say they wouldnt give you another part replacing your bad one?