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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COMETIC Top End Gasket - .030" C9844
COMETIC
$150.10COMETIC Top End Gasket .030" C9844EST (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...09340762- SKU:
- 09340762
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE:
- 3,875'
- MATERIAL:
- STAINLESS STEEL
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
- DISPLACEMENT:
- 95'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
$150.10Qty in Cart: 0Quantity:Price:$150.10Subtotal: -
COMETIC Top End Gasket - 3-13/16" C9768
COMETIC
$173.20COMETIC Top End Gasket 3-13/16" C9768EST (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...09340764- SKU:
- 09340764
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE IMPERIAL:
- 3.8125'
- MATERIAL:
- STAINLESS STEEL
- BORE SIZE:
- 3,8125'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- KIT
- MATERIAL:
- RUBBER
$173.20 -
COMETIC Top End Gasket - 3-3/4" C9770
COMETIC
$144.85COMETIC Top End Gasket 3-3/4" C9770EST (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...09340765- SKU:
- 09340765
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- TYPE:
- TOP END
- BORE SIZE:
- 3,750'
- RIDING STYLE:
- STREET
$144.85Qty in Cart: 0Quantity:Price:$144.85Subtotal: -
COMETIC Top End Gasket - 3-5/8" C9918
COMETIC
$135.40COMETIC Top End Gasket 3-5/8" C9918EST (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...09340766- SKU:
- 09340766
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- BORE SIZE:
- 3,625'
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- FOAM
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- MATERIAL:
- VITON
- TYPE:
- TOP END
- UNITS:
- KIT
$135.40Qty in Cart: 0Quantity:Price:$135.40Subtotal: -
COMETIC Top End Gasket - 70 & 80" C9967
COMETIC
$135.40COMETIC Top End Gasket 70 & 80" C9967EST (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...09340768- SKU:
- 09340768
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- FOAM
- MATERIAL:
- STEEL
- TYPE:
- TOP END
$135.40 -
COMETIC Top End Gasket - 883 XL C9759
COMETIC
$142.75COMETIC Top End Gasket 883 XL C9759EST (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...09340769- SKU:
- 09340769
- Availability:
- Ships Same Business Day
- Weight:
- 0.82 LBS
- BORE SIZE IMPERIAL:
- 3.000'
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 883 CC
- MATERIAL:
- STAINLESS STEEL
- THICKNESS IMPERIAL:
- 0,040'
- TYPE:
- TOP END
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE:
- 3,000'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 1.02 MM
$142.75Qty in Cart: 0Quantity:Price:$142.75Subtotal: -
COMETIC Base Gasket - 3-5/8" C9989
COMETIC
$33.55COMETIC Base Gasket 3-5/8" C9989Outer 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...09340784- SKU:
- 09340784
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- RUBBER
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- MATERIAL:
- STEEL
- STYLE:
- STANDARD
- THICKNESS:
- STOCK
- THICKNESS METRIC:
- 0.51 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
$33.55 -
COMETIC Cam Cover Gasket - XL C9944F5
COMETIC
$25.60COMETIC Cam Cover Gasket XL C9944F5COMETIC Cam Cover Gasket - XL09340785- SKU:
- 09340785
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CAM COVER
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$25.60 -
COMETIC Cam Gasket Kit C9664
COMETIC
$73.45COMETIC Cam Gasket Kit C9664Components made from premium materials for long life and correct fitment, Includes all necessary gaskets, seals, O-rings and cork washers to do a cam change, Made in the U.S.A.09340786- SKU:
- 09340786
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- CAM CHANGE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$73.45 -
COMETIC Head Gasket - 4.125 - .040" C9743
COMETIC
$61.90COMETIC Head Gasket 4.125 .040" C9743Center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements, Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of...09340790- SKU:
- 09340790
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 1,02 MM (0,040')
- BORE SIZE:
- 4,125'
- BORE SIZE IMPERIAL:
- 4.125'
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
$61.90 -
COMETIC Primary Gasket C9607F5
COMETIC
$120.50COMETIC Primary Gasket C9607F5COMETIC Primary Gasket20111489- SKU:
- 20111489
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MOUNTING POSITION:
- OUTER
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- PRIMARY COVER
- THICKNESS METRIC:
- 1.52 MM
- UNITS:
- 5 PACK
$120.50 -
COMETIC Primary Gasket C9308F5
COMETIC
$120.50COMETIC Primary Gasket C9308F5COMETIC Primary Gasket20111490- SKU:
- 20111490
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MOUNTING POSITION:
- OUTER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- PRIMARY COVER
- THICKNESS:
- 1,52 MM (0,060')
- UNITS:
- 5 PACK
$120.50 -
COMETIC Primary Gasket C9310F5
COMETIC
$83.50COMETIC Primary Gasket C9310F5COMETIC Primary Gasket20111491- SKU:
- 20111491
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- PRIMARY COVER
- MOUNTING POSITION:
- OUTER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- UNITS:
- 5 PACK
$83.50 -
COMETIC Primary Gasket C9314F5
COMETIC
$83.50COMETIC Primary Gasket C9314F5Cometic'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...20111492- SKU:
- 20111492
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- THICKNESS METRIC:
- 1.52 MM
- UNITS:
- 5 PACK
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- PRIMARY COVER
- MOUNTING POSITION:
- OUTER
- RIDING STYLE:
- STREET
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
$83.50 -
COMETIC Inspection Cover Gasket - FL C9303F5
COMETIC
$25.60COMETIC Inspection Cover Gasket FL C9303F5Made in the U.S.A.20111493- SKU:
- 20111493
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- INSPECTION COVER
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- THICKNESS METRIC:
- 1.52 MM
- UNITS:
- 5 PACK
$25.60 -
COMETIC Derby Gasket - AFM C9338F5
COMETIC
$30.20COMETIC Derby Gasket AFM C9338F5Derby cover gasket for Harley Davidson models20111496- SKU:
- 20111496
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 5 PACK
- THICKNESS METRIC:
- 1.52 MM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- DERBY COVER
$30.20 -
COMETIC Injector O-Ring C10205
COMETIC
$9.00COMETIC Injector O-Ring C10205Made in the U.S.A.09350994- SKU:
- 09350994
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- APPLICATION:
- FUEL INJECTOR
- UNITS:
- 10 PACK
$9.00 -
COMETIC Injector O-Ring C10206
COMETIC
$9.00COMETIC Injector O-Ring C10206Made in the U.S.A.09350995- SKU:
- 09350995
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- APPLICATION:
- FUEL INJECTOR
$9.00 -
COMETIC Air Cleaner Seal C10207
COMETIC
$17.10COMETIC Air Cleaner Seal C10207Made in the U.S.A.09350996- SKU:
- 09350996
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- AIR CLEANER
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL
$17.10 -
COMETIC O-Ring C10208
COMETIC
$9.00COMETIC O-Ring C10208Made in the U.S.A.09350997- SKU:
- 09350997
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- CRANKCASE
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$9.00Qty in Cart: 0Quantity:Price:$9.00Subtotal:
