I am considering purchasing one of your bikes. If it can handle Erzberg and the last man standing I don't think I will break it. Of concern is how much maintenance is required and is it something I would be able to do in mu garage with a manual. Do you have any people that can provide technical support in southern CA? Do you offer a warranty or guarantee on the system. What would the purchase price and shipping be for a fully assembled CRF450X?