we bought go kart in oct., put it together (with less than helpful instruction manual) and gave it to our son for Christmas. It started with delivery company not having proper equipment or manpower to deliver it. He dropped it off the back of the truck then said I couldn't sign as damaged because crate wasn't broken and it seemed fine to him. No help from complaints to company or shippers. It seemed to be okay when we put it together. Within a week from Christmas the mud guards had broken off. Within a few months from Christmas the muffler broke off. We fixed that and now it is running rough and smoking badly. Mechanic says burned rings, recomends new motor. He says it will be over $500+ shipping for motor. This product is a huge waste of money for if I remember correctly over $2000 dollars. Do not purchase these products!