When my shock went, I got one "brand-used" from Rick Butler. After we got mine out, my friend that was helping me said "Look, the sticker on it says Do Not Disassemble". I said "you know what that means!" Yeah, we tried to take it apart. We cut the spring off, but couldn't get much further than that. And my buddy has a pretty complete metal shop. With my shock, it would take air and hold pressure, but would not lift the bike at all. I figure it has a rubber bladder in it that blew out so the air just filled the void.