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
-
COMETIC Primary Filler O-Ring C9446
COMETIC
$5.30High-quality products for long-term reliability, Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle, Made in the U.S.A.09344704- SKU:
- 09344704
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- FILLER
- MATERIAL:
- NITRILE RUBBER
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
$5.30 -
COMETIC Head Gasket C9564-2
COMETIC
$23.05Center 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 harsh sealing environments, load...09344708- SKU:
- 09344708
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS METRIC:
- 0.81 MM
- UNITS:
- PAIR
- THICKNESS IMPERIAL:
- 0,032'
- TYPE:
- CYLINDER HEAD
$23.05 -
COMETIC Head Gasket C9565-2
COMETIC
$23.05Center 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 harsh sealing environments, load...09344709- SKU:
- 09344709
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- UNITS:
- PAIR
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CYLINDER HEAD
$23.05 -
COMETIC Head Gasket C9566-2
COMETIC
$23.05Center 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 harsh sealing environments, load...09344710- SKU:
- 09344710
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,043'
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.09 MM
- THICKNESS:
- 1,09 MM (0,043')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$23.05 -
COMETIC Cylinder Base Gasket C9603-2
COMETIC
$6.95Cylinder base gasket for Sportster models09344715- SKU:
- 09344715
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,79 MM (0,031')
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- MATERIAL:
- FIBER
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- STANDARD
- THICKNESS IMPERIAL:
- 0,031'
$6.95Qty in Cart: 0Quantity:Price:$6.95Subtotal: -
COMETIC Pushrod Cover Seals C9606
COMETIC
$6.40Contains the correct seals and O-rings needed for a complete rebuild09344716- SKU:
- 09344716
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PUSHROD COVER
- UNITS:
- 25 PACK
- PRODUCT NAME:
- GASKET
$6.40 -
COMETIC Cylinder Base Gasket C9618
COMETIC
$11.95Cylinder base gasket for Sportster models09344718- SKU:
- 09344718
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- PRODUCT NAME:
- GASKET
- MATERIAL:
- FIBER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
$11.95Qty in Cart: 0Quantity:Price:$11.95Subtotal: -
COMETIC Head Gasket C9698-2
COMETIC
$34.60Center 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 harsh sealing environments, load...09344719- SKU:
- 09344719
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS METRIC:
- 0.51 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
$34.60 -
COMETIC Cam Service Gasket Kit C9624F
COMETIC
$26.20Components 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.09341358- SKU:
- 09341358
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- CAM CHANGE
- PRODUCT NAME:
- GASKET KIT
$26.20 -
COMETIC Oil Pump Paper Gasket C9383
COMETIC
$7.40Made in the U.S.A.09341361- SKU:
- 09341361
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- THICKNESS METRIC:
- 0.25 MM
- MATERIAL:
- VULCANIZED FIBER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
$7.40 -
COMETIC Oil Pump Paper Gasket C9381
COMETIC
$7.40Made in the U.S.A.09341362- SKU:
- 09341362
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- MATERIAL:
- VULCANIZED FIBER
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$7.40 -
COMETIC Oil Pump Paper Gasket C9384
COMETIC
$7.40Made in the U.S.A.09341364- SKU:
- 09341364
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.25 MM
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
$7.40 -
COMETIC Inspection Cover Gasket - XL C9326F5
COMETIC
$16.40Made in the U.S.A.09341365- SKU:
- 09341365
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- UNITS:
- 5 PACK
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- INSPECTION COVER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
$16.40 -
COMETIC Head Gasket - 3.937" x .030" C10083-030
COMETIC
$59.80Center 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 harsh sealing environments, load...09343145- SKU:
- 09343145
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE IMPERIAL:
- 3.937'
- THICKNESS:
- 0,76 MM (0,030')
- MATERIAL:
- VITON
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE:
- 3,937'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$59.80 -
COMETIC Derby Cover Gasket - 5 Hole C9152F1
COMETIC
$10.95Derby cover gasket for Harley Davidson models09341240- SKU:
- 09341240
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- MATERIAL:
- SILICONE
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- DERBY COVER
$10.95 -
COMETIC Drain Plug O-Ring C9435
COMETIC
$6.25Made in the U.S.A.09350186- SKU:
- 09350186
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- NITRILE RUBBER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- APPLICATION:
- DRAIN PLUG
- PRODUCT NAME:
- O-RING
$6.25 -
COMETIC Primary Gasket Kit C9888
COMETIC
$130.15Cometic'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%...09340745- SKU:
- 09340745
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
- UNITS:
- KIT
$130.15 -
COMETIC Top End Gasket - Twin Cam C9146
COMETIC
$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...09341206- SKU:
- 09341206
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- DISPLACEMENT:
- 96'
- MATERIAL:
- RUBBER
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- STAINLESS STEEL
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,750'
- DISPLACEMENT:
- 88'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$150.10 -
COMETIC Shifter Shaft Seal C9259
COMETIC
$9.50Made in the U.S.A.09350201- SKU:
- 09350201
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- SHIFTER SHAFT
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
$9.50 -
COMETIC Trans Main Shaft Seal C9215
COMETIC
$14.65High-quality products for long-term reliability, Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle, Made in the U.S.A.09350375- SKU:
- 09350375
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
$14.65
