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
-
On Sale
COMETIC Complete Gasket Kit - XL1200 C9176
COMETIC
MSRP: $288.70Now: $271.00Was: $288.70Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09341224- SKU:
- 09341224
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- MATERIAL:
- STEEL
- UNITS:
- KIT
MSRP: $288.70Now: $271.00Was: $288.70 -
On Sale
COMETIC Trans Gasket Kit - FL C9175
COMETIC
MSRP: $102.85Now: $97.00Was: $102.85High quality, application specific materials give a long and reliable life, Kit includes all necessary gaskets, seals and O-rings needed for each application, Made in the U.S.A.09341223- SKU:
- 09341223
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
MSRP: $102.85Now: $97.00Was: $102.85 -
On Sale
COMETIC Trans Gasket Kit - Softail C9174
COMETIC
MSRP: $102.85Now: $97.00Was: $102.85High quality, application specific materials give a long and reliable life, Kit includes all necessary gaskets, seals and O-rings needed for each application, Made in the U.S.A.09341222- SKU:
- 09341222
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- GASKET KIT
MSRP: $102.85Now: $97.00Was: $102.85 -
On Sale
COMETIC Primary Gasket Kit C9173
COMETIC
MSRP: $121.75Now: $114.00Was: $121.75Cometic's proprietary AFM (Aluminum Foamette Material) gaskets feature an aluminum core with a chemically blown, compounded nitrile synthetic rubber bonded to the outside, Gaskets have resistance to temperatures of more than 2500°F, Have an 85%...09341221- SKU:
- 09341221
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- TYPE:
- PRIMARY
MSRP: $121.75Now: $114.00Was: $121.75 -
On Sale
COMETIC Complete Gasket Kit - Softail C9171
COMETIC
MSRP: $287.65Now: $270.00Was: $287.65Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09341219- SKU:
- 09341219
- Availability:
- Ships Same Business Day
- Weight:
- 1.89 LBS
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- STEEL
- UNITS:
- KIT
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,750'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
MSRP: $287.65Now: $270.00Was: $287.65 -
On Sale
COMETIC Oil Pump Rebuild Gasket C9168
COMETIC
MSRP: $28.30Now: $27.00Was: $28.30Includes correct amount of gaskets, seal, O-rings, retaining rings and keys for one application, Meets or exceeds OEM quality, Premium vulcanized rubber impregnated fiber for long, leak free usage, Made in the U.S.A.09341218- SKU:
- 09341218
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $28.30Now: $27.00Was: $28.30 -
On Sale
COMETIC Complete Gasket Kit - 3-5/8" C9164
COMETIC
MSRP: $356.95Now: $336.00Was: $356.95Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09341216- SKU:
- 09341216
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,625'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
MSRP: $356.95Now: $336.00Was: $356.95 -
On Sale
COMETIC Complete Gasket Kit - Twin Cam - .030" C9161
COMETIC
MSRP: $209.95Now: $197.00Was: $209.95Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09341215- SKU:
- 09341215
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- BORE SIZE:
- 3,875'
- TYPE:
- COMPLETE
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
MSRP: $209.95Now: $197.00Was: $209.95 -
JAMES GASKET Cam Cover Gasket - XL 25263-86-X
JAMES GASKET
$37.30Replacement gaskets for cam chests09341185- SKU:
- 09341185
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- UNITS:
- 5 PACK
$37.30 -
JAMES GASKET Cam Cover Gasket - Big Twin 25225-36-CX
JAMES GASKET
$21.10Replacement gaskets for cam chests09341184- SKU:
- 09341184
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- MATERIAL:
- PAPER
- UNITS:
- 5 PACK
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- CAM COVER
- PRODUCT NAME:
- GASKET
$21.10 -
On Sale
COMETIC Base Gasket - 3-5/8" - .010" C9532
COMETIC
MSRP: $33.55Now: $32.00Was: $33.55Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes, MLS (Multi-Layer Steel) head gaskets promote an even torque load across the gasket...09340780- SKU:
- 09340780
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD
- MATERIAL:
- STEEL
- THICKNESS METRIC:
- 0.25 MM
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
MSRP: $33.55Now: $32.00Was: $33.55 -
On Sale
COMETIC Base Gasket - Twin Cam 4" - .020" C9738
COMETIC
MSRP: $33.55Now: $32.00Was: $33.55Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes, MLS (Multi-Layer Steel) head gaskets promote an even torque load across the gasket...09340776- SKU:
- 09340776
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- STYLE:
- STANDARD
- THICKNESS METRIC:
- 0.51 MM
- PRODUCT NAME:
- GASKET
- MATERIAL:
- STEEL
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
MSRP: $33.55Now: $32.00Was: $33.55 -
On Sale
COMETIC Top End Gasket - Standard - .030" C9845
COMETIC
MSRP: $150.10Now: $141.00Was: $150.10EST (Extreme Sealing Technology) gasket kits include embossed stainless steel head, base, and rocker gaskets covered with a proprietary rubber material, Head gasket material allows heat to be drawn away from the combustion ring and dissipated evenly...09340771- SKU:
- 09340771
- Availability:
- Ships Same Business Day
- Weight:
- 0.83 LBS
- BORE SIZE:
- 3,750'
- DISPLACEMENT:
- 88'
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,030'
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- THICKNESS METRIC:
- 0.76 MM
MSRP: $150.10Now: $141.00Was: $150.10 -
On Sale
COMETIC Top End Gasket - FL/FLH C9968
COMETIC
MSRP: $135.40Now: $127.00Was: $135.40EST (Extreme Sealing Technology) gasket kits include embossed stainless steel head, base, and rocker gaskets covered with a proprietary rubber material, Head gasket material allows heat to be drawn away from the combustion ring and dissipated evenly...09340770- SKU:
- 09340770
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- VITON
- BORE SIZE IMPERIAL:
- 3.437'
- MATERIAL:
- FOAM
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE:
- 3,437'
- UNITS:
- KIT
MSRP: $135.40Now: $127.00Was: $135.40Qty in Cart: 0Quantity:Price:MSRP: $135.40Now: $127.00Was: $135.40Subtotal: -
JAMES GASKET Intake Seal - XL/Buell 26995-98
JAMES GASKET
$37.70JAMES GASKET Intake Seal - XL/Buell09340549- SKU:
- 09340549
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE MANIFOLD
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
$37.70 -
JAMES GASKET Gasket Kit - Flathead 17027-36
JAMES GASKET
$90.95Contain gaskets, oil seals and O-rings necessary to completely rebuild a Panhead engine, Made in the U.S.A.09340546- SKU:
- 09340546
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- UNITS:
- KIT
$90.95 -
JAMES GASKET Carb Back Plate Gasket 29583-01
JAMES GASKET
$15.30Made in the U.S.A.09340324- SKU:
- 09340324
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- MOUNTING POSITION:
- CARBURETOR/THROTTLE BODY TO BACK PLATE
- STYLE:
- CARBURETOR
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- BACKPLATE
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 10 PACK
$15.30 -
JAMES GASKET Derby Cover Paper Gasket 25416-99-X
JAMES GASKET
$36.80Latest 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,...09340289- SKU:
- 09340289
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- THICKNESS:
- 0,80 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- UNITS:
- 5 PACK
- TYPE:
- DERBY COVER
$36.80 -
JAMES GASKET Primary Gasket 34955-04
JAMES GASKET
$95.70Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.09340288- SKU:
- 09340288
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- UNITS:
- 5 PACK
- FEATURES:
- BEADED
- MATERIAL:
- PAPER
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- COVER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,031'
$95.70 -
DRAG SPECIALTIES Gasket Board - Big Twin 0934-0274
DRAG SPECIALTIES
$124.58Complete four-color display features every gasket, seal and O-ring necessary to rebuild any motor, Displays are 20 mil flexible vinyl and come with all necessary hooks and clamshells, Mounts easily on any 1/8" or 1/4" pegboard, Display is designed so...09340274- SKU:
- 09340274
- Availability:
- Ships Same Business Day
- Weight:
- 5.30 LBS
- TYPE:
- GASKET
- PRODUCT NAME:
- DISPLAY BOARD
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$124.58
