strange isn't it? rode a 400f for long years and seen the groves cut into the stand, which was very hard to come by years ago. On the 400, the original exhaust bolts the single tail pipe to a bracket that has 2 holes. Any piece of scrap sheet steel will hold it from coming all the way up, it also tightens the spring tension so the stand isn't wabbling. I only noticed after putting a new stand of it this year, and seeing new scratches on it, from the chain, and seeing forum post' on it here at sohc. Improvise, make it look factory good.