Heavy Duty Clutch Spring Kit BMW S1000RR (10-19), HP4 (12-15), S1000R (14-20), and S1000XR (15-19). Complete kit to upgrade your clutch. Longer clutch life and more MPH, reduces'spongy' lever feel. Valve spring quality material shot-peened, stress relieved. Engineered for millions of trouble-free cycles.Shim adjustable top hats included with. 180 thick spring spacers and assorted shims for fine-tune adjustments. Includes clutch spring support studs and socket head cap screws. Listing and template services provided by inkFrog.