S&S Cycle

VALVE SPRING KIT FOR 1936–’47 BIG TWINS

• Fits S&S KN-Series engines and stock 1936–'47 knucklehead engines • Accommodates cams with valve lifts up to .480" • Kit consists of inner and outer springs for four valves, spring collars, shims, and valve keepers.

S&S® .480" VALVE SPRINGS SPECIFICATIONS—1936–’47 BIG TWIN Lift Installed Height Seat Force Force @ Max Lift .480" 1.315" 160 lb. 310 lb.

.480" VALVE SPRINGS FOR 1936–’47 BIG TWINS Description Part # S&S Valve Spring Kit for 1936–'47 OHV bt 106-6398

REPLACEMENT PARTS FOR .480" VALVE SPRINGS Description Part # Springs, valve, dual, .480" each 106-4362 4 pack 900-0535 Top collar, valve spring 106-3828 Keepers, valve spring, top collar each 90-2037-S 8 pack 50-7165 Bottom collar, valve spring 106-3827 Shim, valve spring .015" 106-4549 Bottom collar spacer 106-5094

CAST IRON VALVE GUIDES FOR 1936–'47 OHV Description Part # Standard 106-3637 18185-40, 18181-36 +.002" 106-3948 18187-40, 18184-36 +.004" 106-3638 +.008" 106-3639

900-0535

106-3637

NOTE: These springs will not fit over stock guides. Stock guides must be turned down or S&S® Vintage guides must be used.

ROLLER ROCKER ARMS FOR 1966–’84 BIG TWIN ENGINES FITMENT • 1966–’84 big twins

• P-Series engines • SH-Series engines FEATURES AND BENEFITS • 8620 steel heat treated forgings for maximum strength • .750" rocker arm bushing for 50% more load bearing area than stock .500" bushings • Roller tip reduces valve tip wear and side thrusting • 1.5:1 rocker ratio

• Oil passage allows top end oiling through pushrods • Compatible with stock or S&S billet rocker boxes

900-4320A

ROCKER ARMS FOR SHOVELHEAD ENGINES Description

Part #

900-4320A 900-4320FA 900-4320RA

Set (includes two each front and rear rocker arms) Front exhaust or rear intake 17375-66A Rear exhaust or front intake 17360-66A

REBUILD KIT S&S® ROLLER ROCKER ARMS Rebuilds four rocker arms

90-4321

All reference to HD® part numbers is for identification purposes only. We in no way are implying that any of S&S Cycle’s products are original equipment parts or that they are equivalent to the corresponding HD® part number shown.

158 S&S Vintage 1926–1999 Order 608-627-1497