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
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JAMES GASKET Primary Cover Gasket - .030" 34955-67-A
JAMES GASKET
$49.50Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174962- SKU:
- DS174962
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- COVER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.80 MM
- STYLE:
- PRIMARY
$49.50 -
JAMES GASKET Primary Gasket - .030" 34955-75-X
JAMES GASKET
$66.90Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174961- SKU:
- DS174961
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- SILICONE
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
$66.90 -
JAMES GASKET Primary Gasket - .30" 34955-89-X
JAMES GASKET
$66.20Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174960- SKU:
- DS174960
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FEATURES:
- BEADED
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- UNITS:
- 5 PACK
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$66.20 -
JAMES GASKET Primary Gasket with Silicon - 5 Speed 34901-79-B
JAMES GASKET
$110.70Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174959- SKU:
- DS174959
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- COVER
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- UNITS:
- 5 PACK
$110.70 -
JAMES GASKET Primary Cover Gasket - .030" 34901-79
JAMES GASKET
$77.40Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174958- SKU:
- DS174958
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- THICKNESS METRIC:
- 0.80 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- TYPE:
- COVER
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
$77.40 -
JAMES GASKET Primary Gasket Kit 34955-75-K
JAMES GASKET
$33.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174956- SKU:
- DS174956
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
$33.95 -
JAMES GASKET Primary Gasket Kit 34955-89-K
JAMES GASKET
$33.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174955- SKU:
- DS174955
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- FEATURES:
- BEADED
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$33.95 -
JAMES GASKET Primary Gasket Kit 34901-79-K
JAMES GASKET
$67.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174954- SKU:
- DS174954
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- MATERIAL:
- PAPER
$67.95 -
JAMES GASKET Primary Gasket Kit 34901-85-K
JAMES GASKET
$67.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174953- SKU:
- DS174953
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,062'
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- MATERIAL:
- PAPER
- THICKNESS METRIC:
- 1.60 MM
$67.95 -
JAMES GASKET Primary Gasket Kit 34901-94-K
JAMES GASKET
$75.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174952- SKU:
- DS174952
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- BEADED
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- MATERIAL:
- SILICONE
$75.95 -
JAMES GASKET Primary Gasket Kit 60539-89-KX
JAMES GASKET
$96.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174951- SKU:
- DS174951
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$96.95 -
JAMES GASKET Primary Gasket Kit 60539-94-K
JAMES GASKET
$96.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174950- SKU:
- DS174950
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- THICKNESS IMPERIAL:
- 0,062'
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- THICKNESS METRIC:
- 1.60 MM
- RIDING STYLE:
- STREET
$96.95 -
JAMES GASKET Head/Base Gasket - Big Twin 16770-84-A
JAMES GASKET
$42.95Genuine James kits include matching head and base gaskets and O-rings where applicable, Made in the U.S.A.DS174924- SKU:
- DS174924
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- TEFLON
- THICKNESS IMPERIAL:
- 0,032'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD BORE
- BORE SIZE IMPERIAL:
- 3.500'
- THICKNESS METRIC:
- 0.81 MM
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- CYLINDER BASE
- TYPE:
- CYLINDER HEAD
- UNITS:
- KIT
$42.95 -
JAMES GASKET Upper Rocker Cover Cork Gasket - Big Twin 17356-84
JAMES GASKET
$45.60Made 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...DS174916- SKU:
- DS174916
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- CORK
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- UPPER
$45.60 -
JAMES GASKET Inner Rocker Cover Cork Gasket 17358-84
JAMES GASKET
$20.90Made 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...DS174915- SKU:
- DS174915
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- INNER
- PRODUCT NAME:
- GASKET
- MATERIAL:
- CORK
- TYPE:
- ROCKER BOX
- UNITS:
- 10 PACK
$20.90 -
JAMES GASKET Cylinder/Base Gasket Set - Big Twin 16770-66-S
JAMES GASKET
$34.95Genuine James kits include matching head and base gaskets and O-rings where applicable, Made in the U.S.A.DS174914- SKU:
- DS174914
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- THICKNESS IMPERIAL:
- 0,045'
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 1.14 MM
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- STYLE:
- STANDARD BORE
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- TEFLON
$34.95 -
JAMES GASKET Head Gasket - Teflon - .32" - XL 16769-73-T
JAMES GASKET
$39.10Made in the U.S.A.DS174913- SKU:
- DS174913
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
- DISPLACEMENT:
- 1000 CC
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- THICKNESS IMPERIAL:
- 0,046'
- MATERIAL:
- TEFLON
- THICKNESS:
- 1,17 MM (0,046')
- THICKNESS METRIC:
- 1.17 MM
$39.10 -
JAMES GASKET Head Gasket V2 - Big Twin 16773-85
JAMES GASKET
$59.20Made in the U.S.A.DS174912- SKU:
- DS174912
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE SIZE:
- -
- MATERIAL:
- -
- UNITS:
- 5 PACK
- BORE SIZE IMPERIAL:
- -
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- TYPE:
- CYLINDER HEAD
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
$59.20 -
JAMES GASKET Fire Ring Head Gasket - FL 16770-66-X
JAMES GASKET
$39.95Made in the U.S.A.DS174911- SKU:
- DS174911
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- FEATURES:
- FIRE RING
- RIDING STYLE:
- STREET
$39.95 -
JAMES GASKET Trans Seal Kit - Big Twin 35230-39-K
JAMES GASKET
$24.95Designed for most 4-speed Big Twin transmissions, Made in the U.S.A.DS174909- SKU:
- DS174909
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- STYLE:
- DOUBLE LIP
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL KIT
- APPLICATION:
- TRANSMISSION
$24.95
