That's a common problem with the Galfer T-Fitting, the stock Yamaha bolt is to large to go thru the Galfer fitting. There should be two other holes on your frame fitting that is not threaded, mount it to one of those with the correct size bolt and a nut with lock washer on the back of the frame tab. It's a little tough to get the nut on due to the fuel tank being in the way, but you should be able to thread it on there. I had the same problem, hope that helps!