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 Transmission Large Gasket 34902-79-A
JAMES GASKET
$40.90Flexible paper gasket product line utilized the latest in gasket paper technology called MicroPore., These gaskets exhibit exceptional fluid resistance and sealability in a wide range of applications and flange conditions., With a reduced pore size, this...DS174348- SKU:
- DS174348
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- THICKNESS METRIC:
- 0.80 MM
- PRODUCT NAME:
- GASKET
- STYLE:
- LARGE
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,80 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- TYPE:
- PRIMARY
- TYPE:
- TRANSMISSION
- MATERIAL:
- PAPER
$40.90 -
JAMES GASKET Cam Cover Gasket - XL 25263-00-X
JAMES GASKET
$37.30Replacement gaskets for cam chestsDS174347- SKU:
- DS174347
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
- FEATURES:
- BEADED
- UNITS:
- 5 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$37.30 -
JAMES GASKET Primary Cover Seal - Big Twin 31433-84-A
JAMES GASKET
$11.60Made in the U.S.A.DS174346- SKU:
- DS174346
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- CLUTCH COVER
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- UNITS:
- 20 PACK
$11.60 -
JAMES GASKET Derby Cover O-Ring - Big Twin 25416-84
JAMES GASKET
$23.10Latest additions to our line of high-quality genuine James gaskets, seals and O-rings, Cover seals are a seal, not a gasket, Cover seals are molded rubber, beaded oil seals with metal inserts and work with all inspection and derby covers; fit billet,...DS174345- SKU:
- DS174345
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- APPLICATION:
- DERBY COVER
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$23.10 -
JAMES GASKET Primary Cover Gasket 60540-36
JAMES GASKET
$54.40Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS174344- SKU:
- DS174344
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- MATERIAL:
- CORK
- PRODUCT NAME:
- GASKET
- TYPE:
- PRIMARY COVER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$54.40 -
JAMES GASKET Inner Primary Bearing Seal - Big Twin 12052
JAMES GASKET
$18.10Made in the U.S.A.DS174343- SKU:
- DS174343
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- UNITS:
- 5 PACK
- APPLICATION:
- INNER PRIMARY
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
$18.10 -
JAMES GASKET Starter Shaft Seal - Big Twin 12051
JAMES GASKET
$22.40Made in the U.S.A.DS174342- SKU:
- DS174342
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- 5 PACK
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
- APPLICATION:
- STARTER
- PRODUCT NAME:
- SEAL
$22.40 -
JAMES GASKET Starter Housing O-Ring 11116
JAMES GASKET
$13.00Made in the U.S.A.DS174341- SKU:
- DS174341
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- APPLICATION:
- STARTER HOUSING
$13.00 -
JAMES GASKET Starter Bolt O-Ring - XL 11171
JAMES GASKET
$14.00Made in the U.S.A.DS174340- SKU:
- DS174340
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- APPLICATION:
- STARTER
$14.00 -
JAMES GASKET Starter Gasket - XL 31488-81
JAMES GASKET
$8.70Made in the U.S.A.DS174338- SKU:
- DS174338
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,76 MM (0,030')
- THICKNESS METRIC:
- 0.76 MM
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- TYPE:
- STARTER HOUSING
- UNITS:
- 10 PACK
$8.70 -
JAMES GASKET Float Bowl O-Ring 27324-83
JAMES GASKET
$21.50Made in the U.S.A.DS174337- SKU:
- DS174337
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- APPLICATION:
- CARBURETOR
- APPLICATION:
- FLOAT BOWL
$21.50 -
JAMES GASKET Compliance Fitting Gasket 29242-83
JAMES GASKET
$8.20Made in the U.S.A.DS174336- SKU:
- DS174336
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$8.20 -
JAMES GASKET Carb Air Cleaner Gasket 29059-88
JAMES GASKET
$7.70Made in the U.S.A.DS174335- SKU:
- DS174335
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,80 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- MOUNTING POSITION:
- AIR CLEANER TO CARBURETOR
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- STYLE:
- AIR CLEANER
- TYPE:
- CARBURETOR
$7.70 -
JAMES GASKET Oil Screen Pump O-Ring 11105
JAMES GASKET
$8.20JAMES GASKET Oil Screen Pump O-RingDS174334- SKU:
- DS174334
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- OIL PUMP
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 25 PACK
$8.20 -
JAMES GASKET Lower Pushrod O-Ring 11145
JAMES GASKET
$12.90Made in the U.S.A.DS174333- SKU:
- DS174333
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- PUSHROD COVER
- PRODUCT NAME:
- O-RING
- MATERIAL:
- RUBBER
- APPLICATION:
- TAPPET GUIDE
- UNITS:
- 25 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$12.90 -
JAMES GASKET Rocker Cover Washer - XL 63858-49
JAMES GASKET
$9.30Made in the U.S.A.DS174332- SKU:
- DS174332
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- UNITS:
- 25 PACK
- APPLICATION:
- ROCKER COVER
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
$9.30 -
JAMES GASKET Cylinder Base Gasket - XL 16774-86
JAMES GASKET
$18.80Require no gasket sealer, Made in the U.S.A.DS174331- SKU:
- DS174331
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- DISPLACEMENT:
- 1200 CC
- DISPLACEMENT:
- 1100 CC
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- UNITS:
- 10 PACK
$18.80 -
JAMES GASKET Cylinder O-Ring - XL 26432-76-A
JAMES GASKET
$15.70Made in the U.S.A.DS174330- SKU:
- DS174330
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- CYLINDER HEAD
- MATERIAL:
- RUBBER
- THICKNESS IMPERIAL:
- 0.045'
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 10 PACK
$15.70 -
JAMES GASKET Valve Guide Gasket - Big Twin 18196-51
JAMES GASKET
$9.00Made in the U.S.A.DS174329- SKU:
- DS174329
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- TYPE:
- VALVE GUIDE
- UNITS:
- 20 PACK
- PRODUCT NAME:
- GASKET
$9.00 -
JAMES GASKET End Cover Gasket 36801-79
JAMES GASKET
$13.20Made in the U.S.A.DS174326- SKU:
- DS174326
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- CLUTCH RELEASE
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
$13.20
