I've been told by some that I can bolt in an 88-90 XR600 rear shock into my 86 XR600...but I've also heard that this won't work because the 88-99 shocks have an attached reservoir (86 is detached) that will not fit due to the stock dual carbs air box. Anyone know what the facts are? The later shock would allow me more freedom of spring sellection. I'm also told it'll lower the bike about 1/2". Anyone actually done this?