I am preparing to set up the suspension on my 1986 XR600R "Project Bike". I weigh in at about 250 lbs. and am looking for the strongest rear spring I can find. Will such a spring be O.K. with the stock shock? I also want to have heavy springs on the front end. I've looked around, and am coming up empty, although about 5 months ago I was poking around and saw something available! I honestly don't remember where that was anymore! Any and all suggestions would be much appreciated! I need as many possible "leads" as possible!