Toomey has some decent stiffer springs. Do you already have a lockout? I run 3 stock 3 stiff springs with mine. If you are wanting to put more weight to them put a longer bolt and 2 nuts on them. Make sure the clear ur cover first. I've had the same clutch for 3 years in my bike and K&T said it looked good yet when I rebuilt it this winter. I don't have any weight added on my lockout either