My dad just got an awesome deal on a yz450f, 2004, alot of mods on it, 2000.00, i must say, pretty awesome bike even though im a honda guy. It came with a box of stock parts which included a rear spring. My question, any idea if this thing would fit my 87 600 rear shock? just thinkin it would be cool cause mine is shot, very soft and saggy. I would check myself but i am away at school so i cant see the parts.