I went and looked at a 2000 KTM LC4 640 today and over all, it looked really nice. It had 9000+ miles on it, it ran good and rode nice. The guy said he bought it new and has only ridden it on road. Would this be considerd high mileage (for a dual sport) or ??? How long should these engines last? Also, he is asking $3,650 for it, is this a fair asking price? Also, is does vibrate a little bit, the owner said it has done this since new and i do remember in a older dirt bike magazine article, they also said it did this. Is this someting i should worry about? Thanks!