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Engine

8284 parts

Harley engine parts for Evo, Twin Cam, Milwaukee-Eight and Sportster motors. Jump to cams, big bore kits, heads, gaskets and seals or engine covers. Free US shipping over $100.

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    V-Twin - 12-1765 - Sifton Thin Tappet Lock Nut Set
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    V-Twin - 12-1765 - Sifton Thin Tappet Lock Nut Set

    Sifton

    $27.24
    V-Twin - 12-1765 - Sifton Thin Tappet Lock Nut SetDescriptionSifton thin tappet lock nuts with 5/16" x 32 thread for solid tappets on Big Twin and Sportster models.Easy installation allows the...
    $27.24
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    $27.24
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    V-Twin - 12-1763 - Head Breather Stud Zinc
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    V-Twin - 12-1763 - Head Breather Stud Zinc

    Motorshop

    MSRP: $44.55
    $43.66
    V-Twin - 12-1763 - Head Breather Stud ZincDescriptionHead breather stud is zinc plated with a thread of 5/16 x 24. Fits:EL 1936-1938Additional Information
    MSRP: $44.55
    $43.66
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    MSRP: $44.55
    $43.66
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    V-Twin - 12-1568 - Replica Cam Chest Breather Valve Standard Size - Fits 1971-1977 Harley-Davidson FX, 1948-1977 FL
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    V-Twin - 12-1568 - Replica Cam Chest Breather Valve Standard Size - Fits 1971-1977 Harley-Davidson FX, 1948-1977 FL

    V-Twin Mfg

    $100.08
    Replica standard size cam chest breather valve is constructed of precision ground steel with screen installed.Order thrust washers separately. ...
    $100.08
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    $100.08
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    V-Twin - 12-1541 - Cam Chest Breather Kit V-Twin - 12-1541 - Cam Chest Breather Kit
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    V-Twin - 12-1541 - Cam Chest Breather Kit

    Motorshop

    $45.05
    V-Twin - 12-1541 - Cam Chest Breather KitDescriptionCam chest breather kit includes cam chest breather deflector pinion shaft breather seal spring, breather pipe, and oil transfer valve. Fits:XL...
    $45.05
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    $45.05
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    V-Twin - 12-1536 - Cam Chest Breather Valve Kit Standard Size V-Twin - 12-1536 - Cam Chest Breather Valve Kit Standard Size
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    V-Twin - 12-1536 - Cam Chest Breather Valve Kit Standard Size

    Motorshop

    $110.50
    V-Twin - 12-1536 - Cam Chest Breather Valve Kit Standard SizeDescriptionThis standard size sifton cam chest breather valve kit is constructed of precision ground steel with screen installed.Kit...
    $110.50
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    $110.50
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    V-Twin - 12-1502 - Distributor Drive Gear
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    V-Twin - 12-1502 - Distributor Drive Gear

    Motorshop

    $109.36
    V-Twin - 12-1502 - Distributor Drive GearDescriptionDistributor drive gear features an overall width of 1.7750". Includes inner and outer pressed in bushings. Fits:FL 1941-1969EL 1936-1952Additional...
    $109.36
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    $109.36
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    V-Twin - 12-1485 - Oil Pump Relief Valve Kit V-Twin - 12-1485 - Oil Pump Relief Valve Kit
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    V-Twin - 12-1485 - Oil Pump Relief Valve Kit

    Motorshop

    $45.05
    V-Twin - 12-1485 - Oil Pump Relief Valve KitDescriptionOil pump relief valve kit includes spring, plug and valve.THe relieft valve piston diameter measures 0.435". Fits:FL 1973-1980FX...
    $45.05
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    V-Twin - 12-1479 - Distributor Drive Cam Gear with Holes V-Twin - 12-1479 - Distributor Drive Cam Gear with Holes
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    V-Twin - 12-1479 - Distributor Drive Cam Gear with Holes

    Motorshop

    $150.63
    V-Twin - 12-1479 - Distributor Drive Cam Gear with HolesDescriptionDistributor drive cam gear with holes.*NOTE: When installing drive gear, first check the fitment of the side drive circuit breaker...
    $150.63
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    $150.63
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    V-Twin - 12-1417 - Oil Pump Relief Valve V-Twin - 12-1417 - Oil Pump Relief Valve
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    V-Twin - 12-1417 - Oil Pump Relief Valve

    Motorshop

    MSRP: $42.09
    $41.25
    V-Twin - 12-1417 - Oil Pump Relief ValveDescriptionRelief valve for oil pump Fits:FLT 1979-1981FX 1971-1981FL 1954-1981Additional Information <
    MSRP: $42.09
    $41.25
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    MSRP: $42.09
    $41.25
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    V-Twin - 12-1293 - Replica Oil Pump Drive Gear
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    V-Twin - 12-1293 - Replica Oil Pump Drive Gear

    Motorshop

    MSRP: $45.13
    $44.22
    V-Twin - 12-1293 - Replica Oil Pump Drive GearDescriptionReplica Oil Pump Drive Gear. Fits:FL 1941-1967EL 1936-1940Additional Information
    MSRP: $45.13
    $44.22
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    MSRP: $45.13
    $44.22
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    V-Twin - 12-1285 - Replica Oil Pump Drive Feed Gear
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    V-Twin - 12-1285 - Replica Oil Pump Drive Feed Gear

    Motorshop

    $54.91
    V-Twin - 12-1285 - Replica Oil Pump Drive Feed GearDescriptionReplica oil pump drive feed gear is the narrow type.Oil pump drive feed gear has groove to drive the Knuckleheaed oil pump governer rotor...
    $54.91
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    V-Twin - 12-1281 - Scavenger Oil Pump Gear - Fits 1937-1952 Harley-Davidson UL, 1937-1973 G
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    V-Twin - 12-1281 - Scavenger Oil Pump Gear - Fits 1937-1952 Harley-Davidson UL, 1937-1973 G

    V-Twin Mfg

    $108.86
    Side Valve scavenger oil pump gear features a double evacuation window, for more scaveging action. Fits:UL 1937-1952G 1937-1973Additional Information OEM
    $108.86
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    $108.86
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    V-Twin - 12-1245 - Side Valve Oil Pump Governor - Fits 1941-1973 Harley-Davidson G V-Twin - 12-1245 - Side Valve Oil Pump Governor - Fits 1941-1973 Harley-Davidson G
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    V-Twin - 12-1245 - Side Valve Oil Pump Governor - Fits 1941-1973 Harley-Davidson G

    V-Twin Mfg

    $98.09
    Side Valve oil pump holder feed pump vane. Fits:G 1941-1973Additional Information OEM No.26270-41 UOM
    $98.09
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    $98.09
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    V-Twin - 12-1244 - Side Valve Oil Pump Bypass Ball Retainer - Fits 1941-1973 Harley-Davidson G
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    V-Twin - 12-1244 - Side Valve Oil Pump Bypass Ball Retainer - Fits 1941-1973 Harley-Davidson G

    V-Twin Mfg

    $98.09
    Bypass ball retainer for Side Valve oil pumps. Fits:G 1941-1973Additional Information OEM No.26381-37 UOM
    $98.09
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    $98.09
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    V-Twin - 12-0896 - Knucklehead Oil Pump Assembly with Rotator - Fits 1941-1947 Harley-Davidson FL, EL
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    V-Twin - 12-0896 - Knucklehead Oil Pump Assembly with Rotator - Fits 1941-1947 Harley-Davidson FL, EL

    V-Twin Mfg

    $591.16
    Knucklehead oil pump assembly with rotator.*NOTE: Includes governor rotor. Fits:FL 1941-1947EL 1941-1947Additional Information UOM1 - KIT<
    $591.16
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    $591.16
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    V-Twin - 12-0879 - Parkerized Oil Pump Cover
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    V-Twin - 12-0879 - Parkerized Oil Pump Cover

    Motorshop

    MSRP: $81.92
    $81.09
    V-Twin - 12-0879 - Parkerized Oil Pump CoverDescriptionCast oil pump cover for Knucklehead and early Panhead models features a parkerized finish, and accepts the centrifugal valve.Uses governor rotor...
    MSRP: $81.92
    $81.09
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    MSRP: $81.92
    $81.09
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    V-Twin - 12-0876 - Knucklehead Oil Pump Body Zinc Plated - Fits 1941-1947 Harley-Davidson FL, EL
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    V-Twin - 12-0876 - Knucklehead Oil Pump Body Zinc Plated - Fits 1941-1947 Harley-Davidson FL, EL

    V-Twin Mfg

    $181.58
    Knucklehead oil pump body is constructed of cast iron and has the early relief valve extension. Features a zinc plated finish.This changed in 1948, by adding a "D" for a change in the part number...
    $181.58
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    $181.58
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    V-Twin - 12-0875 - 1938 Knucklehead Oil Pump Body Cast Iron
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    V-Twin - 12-0875 - 1938 Knucklehead Oil Pump Body Cast Iron

    V-Twin Mfg

    $618.71
    V-Twin - 12-0875 - 1938 Knucklehead Oil Pump Body Cast IronDescriptionCast iron and machined Knucklehead oil pump body is the specific shape for 1938 models to be exact. Fits:EL 1936-1940Additional...
    $618.71
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    $618.71
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    V-Twin - 12-0874 - Partial Oil Pump Assembly
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    V-Twin - 12-0874 - Partial Oil Pump Assembly

    Motorshop

    $277.42
    V-Twin - 12-0874 - Partial Oil Pump AssemblyDescription2020 New Production partial oil pump assembly includes 4 gears and 1 shaft.*NOTE: Keys and snap rings not included, must order separately...
    $277.42
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    $277.42
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    V-Twin - 12-0855 - Oil Pump Parts Kit V-Twin - 12-0855 - Oil Pump Parts Kit
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    V-Twin - 12-0855 - Oil Pump Parts Kit

    Motorshop

    $216.16
    V-Twin - 12-0855 - Oil Pump Parts KitDescriptionOil pump parts kit includes all parts except cover and body.Kits are year specific for each OE body style and fitment. Not for S&S oil pumps. Fits:FL...
    $216.16
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    $216.16
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    V-Twin - 12-0853 - Oil Pump Parts Kit V-Twin - 12-0853 - Oil Pump Parts Kit
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    V-Twin - 12-0853 - Oil Pump Parts Kit

    Motorshop

    $268.14
    V-Twin - 12-0853 - Oil Pump Parts KitDescriptionOil pump parts kit includes all parts except cover and body.Kits are year specific for each OE body style and fitment. Not for S&S oil pumps. Fits:FL...
    $268.14
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    $268.14
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    V-Twin - 12-0852 - Oil Pump Parts Kit V-Twin - 12-0852 - Oil Pump Parts Kit
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    V-Twin - 12-0852 - Oil Pump Parts Kit

    Motorshop

    $231.39
    V-Twin - 12-0852 - Oil Pump Parts KitDescriptionOil pump parts kit includes all parts except cover and body.Kits are year specific for each OE body style and fitment. Not for S&S oil pumps. Fits:FL...
    $231.39
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    $231.39
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    V-Twin - 12-0851 - Oil Pump Parts Kit V-Twin - 12-0851 - Oil Pump Parts Kit
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    V-Twin - 12-0851 - Oil Pump Parts Kit

    Motorshop

    $287.01
    V-Twin - 12-0851 - Oil Pump Parts KitDescriptionOil pump parts kit includes all parts except cover and body.Kits are year specific for each OE body style and fitment. Not for S&S oil pumps. Fits:FL...
    $287.01
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    $287.01
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    V-Twin - 12-0850 - Partial Oil Pump Assembly - Fits 1941-1947 Harley-Davidson FL, 1941-1949 EL
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    V-Twin - 12-0850 - Partial Oil Pump Assembly - Fits 1941-1947 Harley-Davidson FL, 1941-1949 EL

    V-Twin Mfg

    $294.44
    2020 New Production partial oil pump assembly includes the body, 2 shafts and 1 gear. The welch plug is installed.*NOTE: Keys and snap rings not included, must order separately. Fits:FL 1941-1947EL...
    $294.44
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    $294.44
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    V-Twin - 12-0826 - Chrome Rocker Shaft End Plug Set - Fits 1971-1984 Harley-Davidson FL, 1971-1985 XL, 1979-1983 FLT, 1971-1984 FX, 1982-1983 FXR
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    V-Twin - 12-0826 - Chrome Rocker Shaft End Plug Set - Fits 1971-1984 Harley-Davidson FL, 1971-1985 XL, 1979-1983 FLT, 1971-1984 FX, 1982-1983 FXR

    V-Twin Mfg

    $37.28
    Chrome rocker shaft end plug set have an allen style head. Sold as a set of 4. Fits:FL 1971-1984XL 1971-1985FLT 1979-1983FX 1971-1984FXR 1982-1983Additional Information
    $37.28
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    $37.28
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    V-Twin - 12-0825 - Reverse Distributor Gear Kit V-Twin - 12-0825 - Reverse Distributor Gear Kit
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    V-Twin - 12-0825 - Reverse Distributor Gear Kit

    Motorshop

    $376.49
    V-Twin - 12-0825 - Reverse Distributor Gear KitDescriptionReverse rotation gear kit includes timer gear, cam chest idler gear, circuit breaker gear, and gear pins for magneto and distributor. Fits:FL...
    $376.49
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    $376.49
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    V-Twin - 12-0809 - Oil Pump Drive Shaft Kit V-Twin - 12-0809 - Oil Pump Drive Shaft Kit
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    V-Twin - 12-0809 - Oil Pump Drive Shaft Kit

    Motorshop

    $97.05
    V-Twin - 12-0809 - Oil Pump Drive Shaft KitDescriptionSifton oil pump drive shaft kit includes 3 keys, shaft gear, bushing and snap ring. Fits:FL 1968-1969Additional Information
    $97.05
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    $97.05
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    V-Twin - 12-0793 - Cam Chest Breather Valve Gear - Fits 1941-1947 Harley-Davidson FL
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    V-Twin - 12-0793 - Cam Chest Breather Valve Gear - Fits 1941-1947 Harley-Davidson FL

    V-Twin Mfg

    $97.20
    Cam chest breather valve gear is machined and designed to replace orignal ground steel units.*NOTE: Order 8 piece thrust washer separately. Fits:FL 1941-1947Additional Information
    $97.20
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    $97.20
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    V-Twin - 12-0784 - Pinion Bearing Kit V-Twin - 12-0784 - Pinion Bearing Kit
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    V-Twin - 12-0784 - Pinion Bearing Kit

    Motorshop

    MSRP: $73.03
    $72.30
    V-Twin - 12-0784 - Pinion Bearing KitDescriptionPinion bearing kit includes a white and grey engine case right bearing assembly, right side crankcase bearing retaining ring and a pinion shaft gear...
    MSRP: $73.03
    $72.30
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    MSRP: $73.03
    $72.30
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    V-Twin - 12-0771 - Chain Oiler Screw
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    V-Twin - 12-0771 - Chain Oiler Screw

    Motorshop

    MSRP: $15.94
    $15.77
    V-Twin - 12-0771 - Chain Oiler ScrewDescriptionChain oiler screw includes a "heavy" hex nut (7630). Screw is used to stop oil going to the chain. Fits:FL 1941-1964EL 1936-1952Additional Information
    MSRP: $15.94
    $15.77
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    MSRP: $15.94
    $15.77
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    V-Twin - 12-0484 - 1936 Oil Pump Body
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    V-Twin - 12-0484 - 1936 Oil Pump Body

    V-Twin Mfg

    $357.41
    V-Twin - 12-0484 - 1936 Oil Pump Body Description 1936 oil pump body is machined to accept oil line for gauge on dash. Fits: EL 1936-1936 Additional Information
    $357.41
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    $357.41
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    V-Twin - 12-0455 - XL Pinion Gear V-Twin - 12-0455 - XL Pinion Gear
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    V-Twin - 12-0455 - XL Pinion Gear

    Motorshop

    $61.48
    V-Twin - 12-0455 - XL Pinion GearDescriptionXL pinion gear. Fits:XL 1974-1985Additional Information OEM No.24059-74
    $61.48
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    $61.48
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    V-Twin - 12-0433 - Crankcase Sprocket Shaft Roller Bearing Retainer V-Twin - 12-0433 - Crankcase Sprocket Shaft Roller Bearing Retainer
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    V-Twin - 12-0433 - Crankcase Sprocket Shaft Roller Bearing Retainer

    Motorshop

    MSRP: $44.15
    $43.26
    V-Twin - 12-0433 - Crankcase Sprocket Shaft Roller Bearing RetainerDescriptionCrankcase sprocket shaft roller bearing retainer.Sold as a pair. *NOTE: Some applications use a 1.35" O.D. cage. Fits:DL...
    MSRP: $44.15
    $43.26
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    MSRP: $44.15
    $43.26
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    V-Twin - 12-0272 - Oil Pump Pin Oversize
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    V-Twin - 12-0272 - Oil Pump Pin Oversize

    Motorshop

    MSRP: $40.27
    $39.47
    V-Twin - 12-0272 - Oil Pump Pin OversizeDescriptionOil pump pin for the idler gear features an oversize center section. Fits:FL 1941-1967EL 1936-1952Additional Information
    MSRP: $40.27
    $39.47
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    MSRP: $40.27
    $39.47
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    V-Twin - 12-0271 - Replica Oil Pump Rebuild Kit V-Twin - 12-0271 - Replica Oil Pump Rebuild Kit
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    V-Twin - 12-0271 - Replica Oil Pump Rebuild Kit

    Motorshop

    $396.51
    V-Twin - 12-0271 - Replica Oil Pump Rebuild KitDescriptionReplica oil pump rebuild kit includes all components except oil pressure switch and cast iron body.Cover has correct shape for 1941-1949...
    $396.51
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    $396.51
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    V-Twin - 11-2786 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .030 Ov V-Twin - 11-2786 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .030 Ov
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    V-Twin - 11-2786 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .030 Ov

    Motorshop

    $112.44
    V-Twin - 11-2786 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .030 Ov Description Replica 3-1/2" bore piston set has a 8:1 compression ratio and is .030 oversize. Piston set includes...
    $112.44
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    $112.44
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    V-Twin - 11-2784 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .010 Ov V-Twin - 11-2784 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .010 Ov
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    V-Twin - 11-2784 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .010 Ov

    Motorshop

    $112.44
    V-Twin - 11-2784 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .010 Ov Description Replica 3-1/2" bore piston set has a 8:1 compression ratio and is .010 oversize. Piston set includes...
    $112.44
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    $112.44
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    V-Twin - 11-2783 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set Standar
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    V-Twin - 11-2783 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set Standar

    Motorshop

    $96.11
    V-Twin - 11-2783 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set Standar Description Replica 3-1/2" bore piston set has a 8:1 compression ratio and is standard size. Piston set includes...
    $96.11
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    $96.11
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    V-Twin - 11-2782 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .040 Ov V-Twin - 11-2782 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .040 Ov
    Quick view

    V-Twin - 11-2782 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .040 Ov

    Motorshop

    $141.29
    V-Twin - 11-2782 - Replica 80 inch Overhead Valve 3-1/2 inch Piston Set .040 Ov Description Replica 3-1/2" bore piston set has a 8:1 compression ratio and is .040 oversize. Piston set includes...
    $141.29
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    $141.29
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    V-Twin - 11-2770 - Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .070 O V-Twin - 11-2770 - Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .070 O
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    V-Twin - 11-2770 - Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .070 O

    Motorshop

    $100.08
    V-Twin - 11-2770 - Replica 74 inch Overhead Valve 3-7/16 inch Piston Set .070 O Description Replica style 3-7/16" bore piston set has 8.5:1 compression ratio and is .070 oversize. Piston set...
    $100.08
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    $100.08
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About Engine

 

Harley Engine Parts for Rebuilds and Performance

From a fresh gasket set to a full big bore build, we stock the Harley engine parts you need to rebuild, maintain or wake up your motor. Match parts to your engine: Evo, Twin Cam, Milwaukee-Eight and Sportster parts don't swap across.

Shop Engine Parts

We carry engine parts from S&S Cycle, Drag Specialties, V-Twin Mfg, Alloy Art, HardDrive and Rocker Lockers. Pair your build with an air cleaner and exhaust that let it breathe.

Not Sure It Fits?

Year, model and engine all matter, and plenty of parts look the same but aren't. If you can't tell whether something fits your bike, hit us up with your year and model and we'll check it before you order.