Knucklehead Parts

V-Twin - 11-0022 - 61 inch Front MC Cast Knucklehead CylinderDescriptionFront cylinder fits Knucklehead 1936-1947 61" models. Cylinders are for stock bore, stock stroke and compression, featuring 5 fins.Cylinder have original casting marks of MoCasCo...

V-Twin - 11-0023 - 61 inch Rear MC Cast Knucklehead CylinderDescriptionRear cylinder fits Knucklehead 1936-1947 61" models. Cylinders are for stock bore, stock stroke and compression, featuring 5 fins.Cylinder have original casting marks of MoCasCo. Set...

V-Twin - 11-0025 - Knucklehead Rocker Arm SetDescriptionKnucklehead rocker arm set.Sold as a set of 4. Fits:FL 1941-1947EL 1937-1940Additional Information UOM1 - SET ManufacturerMotorshop OriginImported 2025 Catalog Pages516

V-Twin - 11-0494 - 61 inch Knucklehead Rear CylinderDescriptionRear cylinder fits Knucklehead 1936-1947 61" models. Cylinders are for stock bore, stock stroke and compression, featuring 5 fins.Cylinders must be honed to standard size for proper fit. Sold...

V-Twin - 11-0495 - 61 inch Knucklehead Front CylinderDescriptionFront cylinder fits Knucklehead 1936-1947 61" models. Cylinders are for stock bore, stock stroke and compression, featuring 5 fins.Cylinders must be honed to standard size for proper fit...

V-Twin - 11-0498 - 74 inch Knucklehead Rear CylinderDescriptionRear cylinder fits Knucklehead 1941-1947 74" models. Cylinders are for stock bore, stock stroke and compression.Cylinders must be honed to standard size for proper fit. Sold each. Piston is...

V-Twin - 11-0499 - 74 inch Knucklehead Front CylinderDescriptionFront cylinder fits Knucklehead 1941-1947 74" models. Cylinders are for stock bore, stock stroke and compression.Cylinders must be honed to standard size for proper fit. Sold each. Piston is...

V-Twin - 11-0506 - Replica 61 inch Knucklehead Cylinder Set BlackDescriptionReplica 61" Knucklehead cylinder set features cast iron construction with 4 fins above head bolt line. Original markings with a black finish and are pre fitted with cast 7.5:1...

V-Twin - 11-0575 - Knucklehead Tappet Block SetDescriptionKnucklehead tappet block set features cast iron constructionOver 500 pairs sold since 1999! Zinc plating may be painted or dulled to look like cadmium. Fits:EL 1936-1940FL 1941-1947Additional...

V-Twin - 11-0598 - Knucklehead Tappet Block KitDescriptionRaw Knucklehead tappet block kit includes 4 ground lifters with adjusters and zinc plated tappet blocks.Kit includes rocker arm set, which are turned down for added clerance for lower tin...

V-Twin - 11-0790 - Cast Iron Standard Intake/Exhaust Knucklehead Valve GuideDescriptionKnucklehead standard cast iron valve guide fits intake and exhaust and accepts valve stem seals.*NOTE: The guide is the same for intake and exhaust. Fits:EL...

V-Twin - 11-0879 - Knucklehead Rocker Arm Shaft SetDescriptionKnucklehead rocker arm shaft set features oil galley's milled into each shaft, as required on the 1937 EL models, with the tea cup type valve spring covers.Rocker arm shaft set is accurately...

V-Twin - 11-0897 - 1936 EL Pushrod Cover Kit Description Pushrod cover kit includes upper and lower pushrod covers. Upper pushrod clips are stainless steel and do not have lance for removal. Lower pushrod covers are chrome steel type with two grooves...

V-Twin - 11-0899 - 1936 Pushrod Cover Clip Kit Stainless Steel Description Smooth type pushrod cover clip kit features a stainless steel construction, without the lance for removal. Kit includes spring cups, springs and corks.Pushrod cover clip set...

V-Twin - 11-1138 - Cast Iron .002 Oversize Intake/Exhaust Knucklehead ValveDescriptionKnucklehead .002 oversize valve guide features a cast iron construction, as original, with a ground outer diameter.*NOTE: The guide is the same for intake and exhaust...

V-Twin - 11-1139 - Cast Iron .004 Oversize Intake/Exhaust Knucklehead ValveDescriptionKnucklehead .004 oversize valve guide features a cast iron construction, as original, with a ground outer diameter.*NOTE: The guide is the same for intake and exhaust...

V-Twin - 11-1140 - Cast Iron .006 Oversize Intake/Exhaust Knucklehead ValveDescriptionKnucklehead .006 oversize valve guide features a cast iron construction, as original, with a ground outer diameter.*NOTE: The guide is the same for intake and exhaust...

V-Twin - 11-1142 - 1936 Rocker Inner Nut Set Description 1936 rocker inner nut set.Sold as a 4 piece set. Fits: EL 1936-1936 Additional Information UOM 1 - SET Manufacturer V-Twin Origin Imported 2025 Catalog...

V-Twin - 11-1143 - 1936 Knucklehead Rocker Shaft and Cap KitDescription1936 Knucklehead rocker end cap kit with rocker arm shafts.Sold as a 32 piece kit. *NOTE: Caps fastened to rocker shafts by oval head screws. Fits:EL 1936-1936Additional Information ...

V-Twin - 11-1149 - 1936 Rocker Arm Shaft Set Description Rocker arm shaft set features threaded holes to accept oval head screws.Attaches round cover rocker shaft spacer under round cover to hold seal packing in place. *NOTE: Features #8, 32T x 5/8"...

V-Twin - 11-1157 - Knucklehead Rocker Arm SetDescriptionMachined Knucklehead rocker arm set.For use on the 1936-1937 valve spring cup and cap style covers, where the rocker arms will be exposed. The outer diameter of the rocker arm is turned down to .80"...

V-Twin - 11-1170 - 1936 Rocker Shaft Washer Set Description Rocker shaft washer set for the rocker box side, features a ground surface.Right side of rocker box shaft end. Washers have ground surface. Sold as a set of 4. *NOTE: Fits on shaft on the...

V-Twin - 11-1172 - 1936 Rocker Arm Packing Washer Set Description Rocker arm packing washer set measures 1-1/32" x .0375, featuring a steel construction.Sold as a pack of 4. Fits: EL 1936-1937 Additional Information OEM No...

V-Twin - 11-1174 - 1936 Rocker Arm Cork Set Description Rocker arm cork set for 1936 open rocker arm installations.Sold as a set of 4. Fits: EL 1936-1937 Additional Information OEM No. 120-36 UOM 1 -...

V-Twin - 11-1199 - 1936 Knucklehead Rocker Nut Kit Description Knucklehead rocker nut kit includes four pieces of each part that is required to create the "frog eye" covers with internal threads on 1936 rocker shafts.. Fits: FL 1936-1936 EL 1936-1936 ...

V-Twin - 11-1204 - Knucklehead Cylinder Head Set BareDescriptionKnucklelhead cylinder head set is prepped with guides and lower cups. Set features a bare finish. Fits:FL 1941-1947Additional Information UOM1 - SET ManufacturerMotorshop OriginImported ...

V-Twin - 11-1267 - Replica 74 inch Knucklehead Cylinder Set BlackDescriptionReplica 74" Knucklehead cylinder set with 5 fins and black finish features cast iron cast construction with original markings. Set is used for quality restoration on the...

V-Twin - 11-1297 - Knucklehead Cylinder Head SetDescriptionKnucklehead cylinder head set features original cast iron construction with a black finish. Head set includes valves, springs, collars and guides with chrome rocker arm covers. Set includes head...

V-Twin - 11-1303 - Replica Knucklehead Solid Pushrod SetDescriptionSifton pushrod set is constructed of steel for use on Knucklehead engines.Pushrod has a diameter of 3/8". ...

V-Twin - 11-1346 - Knucklehead Upper Valve Collar Spring SetDescriptionKnucklehead upper valve collar spring set is raw oiled steel.Set is for use on Knucklehead valve guides. Fits:EL 1936-1947FL 1941-1947Additional Information UOM1 - SET ...

V-Twin - 11-1349 - Knucklehead Lower Valve Collar Spring SetDescriptionKnucklehead lower valve collar spring set is raw oiled steel.Set is for use on Knucklehead valve guides. *NOTE: For use with upper collars. Fits:EL 1936-1947FL 1941-1947Additional...

V-Twin - 11-1449 - Evolution Knucklehead Rocker Box Cover KitDescriptionKnucklehead Rocker box kit features a natural cast finish for Evolution models and offers additional cooling. Rocker box cover kit includes two covers, two knucklehead and four...

V-Twin - 11-1547 - 1936 Knucklehead Rocker Arm SetDescription1936 Knucklehead rocker arm set is nickel plated and is for use with exposed rocker arms on 1936-1937 EL models only.Buttons are removeable. Remove steel plugs indicated by the arrows. *NOTE:...

V-Twin - 11-1570 - Replica 74 inch Knucklehead Cylinder Kit BlackDescription2022 New Production Replica 74" Knucklehead cylinder set with 5 fins and black finish features cast iron construction with original markings. Pre-fitted with standard cast 8.5:1...

V-Twin - 11-1578 - Knucklehead Valve Guide SetDescriptionKnucklehead valve guide set is updated to accepts seals. The intake and exhaust is the same.Set of 4. For use with seal set V-Twin #14-0452. Fits:EL 1936-1947FL 1941-1947Additional Information ...

V-Twin - 11-1675 - Knucklehead Rocker Box Cover OnlyDescriptionOne piece rocker box cover features a raw finish and is for use on Knucklehead rocker box kits. Fits:FLST 1985-1999FLT 1985-1998FXST 1985-1999Additional Information UOM1 - EA ...

V-Twin - 11-1676 - Evolution Knucklehead Rocker Box CoverDescriptionEvolution Knucklehead rocker box cover fetures a raw finish and is one piece only for use on Knucklehead rocker box kit. Fits:FLST 1985-1999FLT 1985-1998FXST 1985-1999Additional...

V-Twin - 11-1689 - 74 inch Knucklehead Front CylinderDescriptionFront cylinder fits Knucklehead 1941-1947 74" models. Features MC cast factory markings.Bore size finished with .025 clearance. Fits:FL 1941-1947Additional Information UOM1 - EA ...

V-Twin - 11-1690 - 74 inch Knucklehead Rear CylinderDescriptionRear cylinder fits Knucklehead 1941-1947 74" models. Features MC cast factory markings.Bore size finished with .025 clearance. Fits:FL 1941-1947Additional Information UOM1 - EA ...

V-Twin - 11-1967 - Cast Iron Standard Intake/Exhaust Knucklehead Valve Guide Description Knucklehead standard cast iron valve guide four piece set, fits intake and exhaust and does not accepts valve stem seals.Sold as a 4 piece set. Fits: EL...