Make sure all the paper work is in order, check the vin# on the pink against the bike....and if he doesnt have the pink, go with him to the bank and pay it off, if you take the bike with no title he could have jacked it, shit id even ask to see his id to make sure hes the owner.....and look at the air cleaner, and air box, and if the chains never been adjusted there will still be little paint marks across where the 12mm nut sits on the 10mm bolt.........