You need a piece of flat bar, probably 2" x 3" or 50 mm x 75 mm which ever measurement you prefer, and a small muffler clamp. I find the 1.5" ones are the right size but you should measure your down tube to be sure. On one side of the flat drill two holes the same distance apart as the studs on your engine, on the other side of the flat drill two holes the same distance apart as the muffler clamp. Bolt the flat to your engine with the studs and then put the muffler clamp around the down tube and bolt it up.