You could probably go to the DMV with the vin # and have them do a search but you might be opening up a real can of worms. If the bike is stolen you could be accused of the crime and possession of stolen property and at the very least the bike will be taken from you and returned to its rightful owner and you will be out your money. If the guy you bought it from had the title but simply lost it, he can apply for a replacement. If you want to be a nice guy tell him you will pay the cost of the replacement, around $50 I think. Once he has the replacement he signs it over to you and then you take that title to the DMV and apply for another one in your name and another $50. Thats how its done in NY. Other states may be different.............BG