Engine
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Engine - Cam (293)
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Engine - Cam Cover (74)
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Engine - Connecting Rod (74)
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Engine - Crank Case (199)
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Engine - Crank Pin (56)
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Engine - Cylinder (150)
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Engine - Cylinder Head (76)
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Engine - Dress Up Kit (84)
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Engine - Engine Mount (143)
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Engine - Flywheel (54)
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Engine - Long Block (6)
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Engine - Oil Pump (223)
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Engine - Pinion Shaft (74)
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Engine - Piston (289)
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Engine - Piston Ring (174)
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Engine - Pushrod (62)
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Engine - Pushrod Cover (80)
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Engine - Rocker Arm (78)
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Engine - Rocker Box (179)
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Engine - Seals, Gaskets & O-Rings (594)
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Engine - Short Block (6)
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Engine - Sprocket Shaft (54)
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Engine - Tappet (136)
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Engine - Tappet Block (67)
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Engine - Valves (388)
Connecting Rod Roller Bearing Set.0006 - V-Twin 10-0155
V-Twin ManufacturingTorrington bearing set is.0006 oversize with 18 long and 36 short rollers. Roller bearing set supplies enough rollers for application only for use ...
View full detailsConnecting Rod Roller Bearing Set Standard - V-Twin 10-0152
V-Twin ManufacturingTorrington bearing set is standard size with 18 long and 36 short rollers. Roller bearing set supplies enough rollers for application only for use ...
View full detailsConnecting Rod Roller Bearing Set.0004 - V-Twin 10-0146 - Shovelhead 1973+
V-Twin ManufacturingTorrington bearing set is.0004 oversize with 17 long and 34 short rollers. Roller bearing set supplies enough rollers for application only for use ...
View full detailsConnecting Rod Roller Bearing Set.0006 - V-Twin 10-0147 - Shovelhead 1973+
V-Twin ManufacturingTorrington bearing set is.0006 oversize with 17 long and 34 short rollers. Roller bearing set supplies enough rollers for application only for use ...
View full detailsConnecting Rod Roller Bearing Set with Cages - V-Twin 10-0141 - OEM 24385-40B - Big Twin 1936-1986
V-Twin ManufacturingOEM #: 24385-40B Set of 3 alloy cages fitted with standard size Torrington rollers for connecting rods. Fitment: 1936-1940 EL 1941-1984 FL 198...
View full detailsConnecting Rod Race Set - V-Twin 10-0138 - OEM 24345-36A - Big Twin 1936-1998
V-Twin ManufacturingOEM #: 24345-36A, 24356-36A Sets are made from 52100 steel and hardened. Measurements: Inner Diameter: 1.6280 inches Outer Diameter: 1.8175 inches ...
View full detailsConnecting Rod Roller Bearing Set.0002 - V-Twin 10-0145 - Shovelhead 1973+
V-Twin ManufacturingTorrington set is.0002 oversize with 17 long and 34 short rollers. Roller bearing set supplies enough rollers for application only for use with all...
View full detailsConnecting Rod Roller Bearing Set Standard - V-Twin 10-0144 - OEM 24366-71 - Shovelhead 1973+
V-Twin ManufacturingOEM #: 24366-71, 86269-71 Torrington set is standard size and contains 17 long and 34 short rollers. Roller bearing set supplies enough rollers for...
View full details2-Hole Magnum Crank Pin - V-Twin 10-0135 - OEM 23961-41
V-Twin ManufacturingOEM #: 23961-41, 348-41 Magnum crank pin is made from 8620 steel.062 heat treated penetration. Crank pin is 2-hole type. Fitment: 1941-1980 FL 1...
View full detailsConnecting Rod Assembly - V-Twin 10-0142 - OEM 24275-86B - Evolution Sportster 1986-1999
V-Twin ManufacturingOEM #: 24275-86B Assembly includes new rods crank pin nuts cages and standard rollers fitted and assembled. Piston pin bushings are installed and h...
View full details2-Hole Eastern Super Crank Pin - Eastern A-23961-79 - OEM 23961-41
EasternEastern #: A-23961-79 · OEM #: 23961-41, 348-41 Eastern Super crank pin is made of 8620 steel.120 heat protection. Crank pin is 2-hole type. Fitmen...
View full details3-Hole Crank Pin - Eastern A-23962-40 - OEM 23962-40
EasternEastern #: A-23962-40 · OEM #: 23962-40, 348-40 Crank pins are made of 8620 steel.062 heat treated penetration. Crank pin is 3-hole type. Measureme...
View full details3-Hole Crank Pin - Eastern A-23961-41 - OEM 23961-41
EasternEastern #: A-23961-41 · OEM #: 23961-41, 348-41 Crank pins are made of 8620 steel.062 heat treated penetration. Crank pin is 3-hole type. Fitment: ...
View full details1-Hole Crank Pin - Eastern A-23961-80 - OEM 23961-80A - Big Twin 1981-1998
EasternEastern #: A-23961-80 · OEM #: 23961-80A Crank pins are made of 8620 steel.062 heat treated penetration. Crank pin is 1-hole type. Fitment: 1981-1...
View full detailsChrome Nose Cone Cam Cover - V-Twin 10-0110 - OEM 25218-70
V-Twin ManufacturingOEM #: 25218-70 Cam cover includes installed bushings and seal. For use on models with a side oiling pinion shaft. Fitment: 1970-1973 FL 1971-19...
View full detailsChrome Tappet Block Set - V-Twin 10-0095 - OEM 18600-66B
V-Twin ManufacturingOEM #: 18600-66B, 18610-66B Front and rear cast iron tappet block. Set is sold in a quanity of 2. Order gasket kit and seals separately. Fitment: ...
View full detailsPanhead 4-Finned Cam Cover Chrome - V-Twin 10-0126 - OEM 25216-58
V-Twin ManufacturingOEM #: 25216-58 Panhead cam cover for Big Twin models includes installed cam bushings and is constructed of forged aluminum steel with a chrome fin...
View full detailsChrome Nose Cone Cam Cover - V-Twin 10-0111 - OEM 25268-84A - Big Twin 1973-1992
V-Twin ManufacturingOEM #: 25268-84A Cover fits 1973-1992 Big Twin with end oiling pinion shaft installed bushings and seal included. Fitment: 1973-1984 FL 1986-199...
View full detailsPolished Nose Cone Cam Cover - V-Twin 10-0090
V-Twin ManufacturingCam Cover fits 1970-1973 Big Twin with side oiling pinion shaft with seal. Cover is installed with bushings. Measurements: Small Bushing:.523 inche...
View full detailsSmooth Flatside Style Cast Cam Cover - V-Twin 10-0079 - OEM 25216-66
V-Twin ManufacturingOEM #: 25216-66 Replica cast cam cover flatside style constructed of natural aluminum with bushings installed. Cover features natural cast finish a...
View full detailsPolished Nose Cone Cam Cover - V-Twin 10-0088 - OEM 25268-84A - Big Twin 1973-1992
V-Twin ManufacturingOEM #: 25268-84A Cam cover features bushings installed. Comes with mounting screws gasket and seal. Fitment: 1973-1984 FL 1986-1992 FLST 1979-...
View full details4-Fin Panhead Cam Cover Cast - V-Twin 10-0068 - OEM 25216-58
V-Twin ManufacturingOEM #: 25216-58 Cast aluminum cam cover includes bushings and breather pipe. The cover has a stock natural finish and is 4-finned. Cam cover bushin...
View full details4-Finned Panhead Cam Cover Cast - V-Twin 10-0067 - OEM 25216-48
V-Twin ManufacturingOEM #: 25216-48, 584-48 Cast cam cover with 4-finned stock finish includes bushings and breather pipe. Cover include early pinion shaft bushing ins...
View full detailsFlywheel Assembly with 4-5/8 Stroke - S&S Cycle 32-2015
S&S CycleS&S Cycle #: 32-2015 EM LIST Assembly is for 1973-1984 Big Twin and are machined from heat treated steel forgings. Cover features natural cast ...
View full detailsMore about Engine
Our Engine catalog covers Harley-Davidson Big Twin and Sportster models, with everything organized below so you can go straight to the part you need. Sourced primarily from Colony, with genuine OEM-spec pieces filling in where it counts.
Everything below is organized by sub-category - Seals, Gaskets & O-Rings, Rocker Box, Cam, Piston, Tools, and Oil Pump - so you can jump straight to what your build needs next.