Anyone who has used the Poseidon has had a problem with the top piece coming off and breaking .. like the pic above but instead of putting it on the carb cap get the small end a little wet and snake it down from the top of the mouth piece with the strap facing down to the lip at the bottom of the mouth piece and the bid end like the photo above on to the base of the poseidon with the strap up like the pic ..a great fit .. I broke my mouth piece in the first 2 days now with this it has been a few months NO PROBLEMS it caught it so many times . you can get an extra one and hang the carb cap from the banger part