Engine Replacement Parts

S&S Cycle 31-2321-S S&S Cycle 84-99 BT 6.68in Cylinder Base Stud

Cylinder Stud, 3/8-16 x 6.680". Fits 1984-1999 V-Series engines with less than 4" bore. 8 required per crankcase, sold each. FitmentYear(s)MakeModel CodeModel1984-1999Harley-Davidson—Big Twin

S&S Cycle 31-2325-S S&S Cycle 3/8-16 UNC x 6.070in Cylinder Base Stud

Cylinder Stud 3/8-16 x 6.070". Fits 1999-2017 big twin and 1986-2003 SB-series engines. 8 required per crankcase, sold each.

S&S Cycle 31-4022 S&S Cycle 1970+ BT 1in x 1.441in x .250in Gearcover Cam Seal

Replacement cam seal used in gearcovers for 1970-1999 and S&S V-Series engines. One required per gearcover, sold each. Replaces OEM p/n 83162-51. FitmentYear(s)MakeModel CodeModel1970-2028Harley-Davidson—Big Twin

S&S Cycle 31-4110 S&S Cycle 1970+ BT 1.750in x 2.507in x .3130in Left Main Bearing Seal - 5 Pack

Sprocket shaft seal for 1936-1999 big twin and S&S KN, P, SH, V and SB series engines. One required per engine, 5 pack. Replaces OEM p/n 120268. FitmentYear(s)MakeModel CodeModel1970-2028Harley-Davidson—Big Twin

S&S Cycle 31-6021 S&S Cycle 36-99 BT Oil Pump Check Valve Screw

Screw for check valve and relief valve ports in OEM and S&S oil pumps for 1936-1999 big twin engines. Two required per oil pump, sold each. Replaces OEM 26263-80 and 26362-36.

S&S Cycle 31-6022 S&S Cycle 36-99 BT .265in x .319in x 1.940in Check Valve Spring

Oil Pump Check Valve Spring for 1936-1999 big twin. .020" wire .265" x .319" x 1.940". One required per pump, sold each. FitmentYear(s)MakeModel CodeModel1936-1999Harley-Davidson—Big Twin

S&S Cycle 310-0437 S&S Cycle 3/8-16 UNC x 6.312in Cylinder Base Stud

Cylinder Stud kit, 3/8-16 x 6.312". Fits 1999-2017 big twin and 1986-2003 SB-series engines. 8 required per crankcase, sold each.

S&S Cycle 33-4201 S&S Cycle .325in x .740in x .110in Breather Gear Shim

Breather gear spacer shim, +.110" for use in 1984-1999. Replaces OEM p/n 25320-79.

S&S Cycle 33-4289 S&S Cycle 53-84 BT .740in x .900in x .320in Oil Pump Drive Gear Spacer

Pinion shaft gear spacer for 1954-1989 big twin. FitmentYear(s)MakeModel CodeModel1954-1989Harley-Davidson—Big Twin

S&S Cycle 33-5201 S&S Cycle .062in Cam Lock Washer

Cam Lock Washer for 1966-1999 big twin. Replaces OEM p/n 25550-57A. One required per engine, sold each.

S&S Cycle 34-4006 S&S Cycle 41-99 BT Rear Connecting Rod

Bearing race for rear (forked) connecting rod for 1941-1999 big twin engines and V96, V107 and V113 S&S engines. Two required for a rear rod, sold each. FitmentYear(s)MakeModel CodeModel1941-1999Harley-Davidson—Big Twin

S&S Cycle 50-0054-S S&S Cycle 8-32 x 3/8in Screw

Steel Torx panhead screw, 8-32 x 3/8". Used in V-Series motors for crank position sensor cover and T-Series motors for piston cooling jet hardware. Replaces oem 68042-99

S&S Cycle 50-1052 S&S Cycle 1/4-20 x 1in Air Cleaner Mounting Screw - 3 Pack

Teardrop Air Cleaner Screw (3 pack). 1/4-20 x 1" nickel-plated stainless steel pan head

S&S Cycle 50-7962-S S&S Cycle .812in ID x .937in OD Viton O-Ring

Viton O-ring used on S&S billet SH-Series rocker boxes on rocker arm shaft plug. Size (-019) .812" ID x .937" OD. Two required per cylinder head.

S&S Cycle 50-8023 S&S Cycle .557in x .500in Steel Pin Dowel

Case alignment dowel for 1999-2017 big twin and S&S T-series engines. .557" x .500" steel dowel pins, 2 required per engine, sold each.