on my 250r shock, the stock bolt works, all you need to do is grind the little thin collar on the top mount.....tyler on the top of the shock does yous shock have the little collar on it...its like a brown or copper color? if so just gring that a little bit till it fits in between the shock mount, but dont cut it off all the way, just grind it down till if fits and is even on both sides.......grease the bushing, and then slide the stock bolt in, and bolt it in, but not fully tightend down.......and then put the bottom shock mount line it up in the swinger, put the big pin back in then put the cotter pin back through the big pin and the bottom is down, and tighen the top mount down and it should be ready...let me know if i didnt make sumthing clear enough