If you lift the black Yamaha rubber grip there should be a number on one side just where the rubber covers the key, i believe they are all 2 digit numbers, that is all you need. Call your local dealer and tell them you need that key number and they can get it to you if it is in stock, if not it should only take a day or two. The keys are fairly cheap, we have 3 sets, one we carry with us and one in each car my Dad and I use incase we lose of forget them, and the marina has a set as well.