If you're looking for a seller who stands behind their products and provides customer service and support, Forget GOKARTSUSA. I would like to say their customer service is terrible, but there IS NONE. Their shipping stinks. I purchased a TrailMaster 400. The shipper left it at their dock after it arrived at our destination city for 2 weeks and didn't notify anyone. I had a missing part. I notified Gokartsusa assuming they would replace it. It never happened. Now I have an electrical problem. They claim that they will respond to your request within 2-3 hours. That is a LIE. They will not respond - EVER. I am thinking there is only a skeleton staff at this company. They take orders and have your purchase shipped from a different company. I think their whole staff is an order taker. My advice: AVOID THIS COMPANY.