Harley Engine
Harley Bike Engine Parts at JJ Motorsports
Rebuild and boost your Harley's engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, piston kits, oil filters, pushrod tubes, and coolers designed for maximum strength, leak-free sealing, and high-performance in extreme conditions. Compatible with Big Twins, Softail, Touring, and more, these components support top-end overhauls, oil management, and durability for street rides or custom builds.
Shop trusted brands like Drag Specialties for magnetic filters and Wiseco for forged pistons. Explore related categories such as Harley air and fuel for carb tuning or Harley drivetrain for transmission upgrades.
Top Harley Engine Products
- DRAG SPECIALTIES Magnetic Ring Oil Filter - Chrome - 3-1/4" 140003HP-BX18 – Captures metal particles with pressure relief.
- WISECO Piston Kit .010 .883 XL K1656 – Forged aluminum with rings, pins, and circlips for rebuilds.
- DRAG SPECIALTIES Pushrod Tube Kit Big Twin 75711 – Includes tubes, clips, cups, and springs for complete engine.
- ULTRACOOL Below Regulator Mount Oil Cooler Stainless Steel RF-2CSS – Fits S&S 111/124/143 engines with machined adapter.
- PAUGHCO Ribbed Teardrop Air Cleaner 701-200 – Chrome-plated aluminum with mini filter.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
JAMES GASKET Cam Cover Gasket - Knucklehead EL 25225-36-A
JAMES GASKET
$29.10Replacement gaskets for cam chestsDS174422- SKU:
- DS174422
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- THICKNESS:
- 0,51 MM (0,020')
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
- UNITS:
- 10 PACK
$29.10 -
JAMES GASKET Magneto Plate Oil Seal - XLCH 12023
JAMES GASKET
$22.10Made in the U.S.A.DS174421- SKU:
- DS174421
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
- APPLICATION:
- MAGNETO MOUNTING
- APPLICATION:
- PUSHROD COVER
$22.10Qty in Cart: 0Quantity:Price:$22.10Subtotal: -
JAMES GASKET Rear Cylinder Base Gasket - Big Twin 16777-48
JAMES GASKET
$16.60Require no gasket sealer, Made in the U.S.A.DS174420- SKU:
- DS174420
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
$16.60 -
JAMES GASKET Rubber Upper Rocker Cover Gasket - Big Twin 17356-92
JAMES GASKET
$42.80Made from a solid steel sheet coated on two sides with a high-temperature elastomer. Strategically placed elastomer beading helps ensure a positive seal while our clear silicone conformal coating fills in minor imperfections in the flanges and provides...DS174419- SKU:
- DS174419
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET
- MOUNTING POSITION:
- UPPER
- UNITS:
- 5 PACK
- MATERIAL:
- RUBBER
$42.80 -
JAMES GASKET Rocker Cover Gasket 17539-38
JAMES GASKET
$14.11Made from a solid steel sheet coated on two sides with a high-temperature elastomer. Strategically placed elastomer beading helps ensure a positive seal while our clear silicone conformal coating fills in minor imperfections in the flanges and provides...DS174417- SKU:
- DS174417
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- ROCKER COVER
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- MOUNTING POSITION:
- FRONT
$14.11 -
JAMES GASKET Rocker Cover Gasket 17537-38
JAMES GASKET
$16.60Made from a solid steel sheet coated on two sides with a high-temperature elastomer. Strategically placed elastomer beading helps ensure a positive seal while our clear silicone conformal coating fills in minor imperfections in the flanges and provides...DS174416- SKU:
- DS174416
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- INTAKE
- TYPE:
- ROCKER COVER
- MOUNTING POSITION:
- REAR
- UNITS:
- 10 PACK
$16.60 -
JAMES GASKET Rocker Cover Gasket 17535-38
JAMES GASKET
$14.70Made from a solid steel sheet coated on two sides with a high-temperature elastomer. Strategically placed elastomer beading helps ensure a positive seal while our clear silicone conformal coating fills in minor imperfections in the flanges and provides...DS174415- SKU:
- DS174415
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ROCKER COVER
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- FRONT
- MOUNTING POSITION:
- REAR
- TYPE:
- EXHAUST
- TYPE:
- INTAKE
- UNITS:
- 10 PACK
$14.70 -
JAMES GASKET Rocker Cover Seal 17475-38
JAMES GASKET
$23.70JAMES GASKET Rocker Cover SealDS174414- SKU:
- DS174414
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- ROCKER COVER
- PRODUCT NAME:
- SEAL
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$23.70 -
JAMES GASKET Rubber Inner Rocker Cover Gasket 17358-84-A
JAMES GASKET
$20.30Made from a solid steel sheet coated on two sides with a high-temperature elastomer. Strategically placed elastomer beading helps ensure a positive seal while our clear silicone conformal coating fills in minor imperfections in the flanges and provides...DS174413- SKU:
- DS174413
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
- MOUNTING POSITION:
- INNER
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- 10 PACK
$20.30 -
JAMES GASKET Upper Rocker Cover Gasket Rubber 17356-84-A
JAMES GASKET
$42.80Made from a solid steel sheet coated on two sides with a high-temperature elastomer. Strategically placed elastomer beading helps ensure a positive seal while our clear silicone conformal coating fills in minor imperfections in the flanges and provides...DS174412- SKU:
- DS174412
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- RUBBER
- MOUNTING POSITION:
- UPPER
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$42.80 -
JAMES GASKET Lower Rocker Cover Rubber - Big Twin 17355-84-A
JAMES GASKET
$42.80Made from a solid steel sheet coated on two sides with a high-temperature elastomer. Strategically placed elastomer beading helps ensure a positive seal while our clear silicone conformal coating fills in minor imperfections in the flanges and provides...DS174411- SKU:
- DS174411
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- RUBBER
- UNITS:
- 5 PACK
- MOUNTING POSITION:
- LOWER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- ROCKER BOX
$42.80 -
JAMES GASKET Front Cylinder Base Gasket - Big Twin 16776-48
JAMES GASKET
$16.60Require no gasket sealer, Made in the U.S.A.DS174410- SKU:
- DS174410
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CYLINDER BASE
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
$16.60 -
JAMES GASKET Base Gasket - 3-5/8" - Big Twin 16777-66-S
JAMES GASKET
$24.50Require no gasket sealer, Made in the U.S.A.DS174409- SKU:
- DS174409
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- TYPE:
- CYLINDER BASE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 0.81 MM
- UNITS:
- 10 PACK
- THICKNESS IMPERIAL:
- 0,032'
- RIDING STYLE:
- STREET
$24.50 -
JAMES GASKET Front Base Gasket - FL/FX 16776-63
JAMES GASKET
$16.60Require no gasket sealer, Made in the U.S.A.DS174408- SKU:
- DS174408
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- THICKNESS METRIC:
- 0.81 MM
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,032'
- TYPE:
- CYLINDER BASE
$16.60 -
JAMES GASKET Front/Rear Base Gasket - EL 16774-21
JAMES GASKET
$16.60Require no gasket sealer, Made in the U.S.A.DS174405- SKU:
- DS174405
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
- TYPE:
- CYLINDER BASE
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- PRODUCT NAME:
- GASKET
$16.60 -
JAMES GASKET Head Gasket - Big Twin 16773-85-T
JAMES GASKET
$59.20Made in the U.S.A.DS174404- SKU:
- DS174404
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- DISPLACEMENT:
- 1200 CC
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- MATERIAL:
- TEFLON
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,14 MM (0,045')
- UNITS:
- 5 PACK
- DISPLACEMENT:
- 1340 CC
- TYPE:
- CYLINDER HEAD
$59.20 -
JAMES GASKET Big Bore Gasket Set - Big Twin 16770-86-S
JAMES GASKET
$49.95Genuine James kits include matching head and base gaskets and O-rings where applicable, Made in the U.S.A.DS174403- SKU:
- DS174403
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD BORE
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- TYPE:
- CYLINDER HEAD
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
- MATERIAL:
- TEFLON
$49.95 -
JAMES GASKET Fire Ring Head Gasket - Panhead 16770-48-X
JAMES GASKET
$48.95Made in the U.S.A.DS174402- SKU:
- DS174402
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
- PRODUCT NAME:
- GASKET
- FEATURES:
- FIRE RING
- THICKNESS:
- 1,14 MM (0,045')
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$48.95 -
JAMES GASKET Tappet Pin Cover O-Ring - XL 11176
JAMES GASKET
$3.00Made in the U.S.A.DS174398- SKU:
- DS174398
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- TAPPET GUIDE
- PRODUCT NAME:
- O-RING
- TYPE:
- PIN
- RIDING STYLE:
- STREET
- UNITS:
- 25 PACK
$3.00 -
JAMES GASKET Solenoid Mounting Air Control O-Ring 11170
JAMES GASKET
$17.20Made in the U.S.A.DS174396- SKU:
- DS174396
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
- APPLICATION:
- CRANKSHAFT POSITION SENSOR
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$17.20
