i to have an 85 that i gotta sell (car wreck put me outta commision) and these are the best period. yeah yeah yeah i know the dont stop or turn like a 250, but the roost you shovel at em when you get a straight makes it worth wrestling that big b*stard around the turns. try a pro circuit pipe & muffler, a sudco pwk 39.5 carb ( factory for the kx500) and a set of 14/49 gears ( 13/51 is stock) with a moto tassinari vforce reed cage and hang the hell on!!!!!