Is replacing a spring on the shock difficult, like does it require a bunch of special tools? I may be in the same boat. Without the lowering linkage in (doing that tomorrow) I can only get about 2 & 1/2" of sag. I'm probably 5 or so threads from the top. Yamalink recommends a 10% heavier spring if you're at the top limit stock, so I'm assuming that means I'll need 10% less as I'm at the bottom (I weigh 155 pounds).