I'm looking for a stiffer rear spring for my klx110 v2 I-shock, and was wondering what springs you guys are using? I'm 6'2'' and 200 lbs, and have a sik110s +3 swinger. The shock came with a 350 lb spring, but wasn't sure if I should go 450 or 550? Also, does anybody have one for sale? Let me know. Thanks.