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
-
JAMES GASKET Oil Pump Plug O-Ring - M8 JGI-11900010
JAMES GASKET
$7.70Made in the U.S.A.09350988- SKU:
- 09350988
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- UNITS:
- 10 PACK
$7.70 -
JAMES GASKET Oil Pump Outer O-Ring - M8 JGI-11900103
JAMES GASKET
$4.30Made in the U.S.A.09350989- SKU:
- 09350989
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- MATERIAL:
- RUBBER
- UNITS:
- 10 PACK
$4.30 -
On Sale
JAMES GASKET Oil Pump Cover O-ring 10966
JAMES GASKET
Now: $4.00Was: $5.90Made in the U.S.A.09346488- SKU:
- 09346488
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- TYPE:
- OIL PUMP COVER
- UNITS:
- EACH
Now: $4.00Was: $5.90 -
JAMES GASKET Oil Deflector Seal 60518-65-DL
JAMES GASKET
$14.95Oil deflector seal for Harley Davidson models09350092- SKU:
- 09350092
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- APPLICATION:
- DEFLECTOR PLATE
$14.95 -
K & N Oil Filter - Black - Evolution KN-170
K & N
$17.99K&N delivers a premium oil filter which is built with a synthetic media specifically designed to withstand the high concentrates of synthetic racing oils, A large filter media provides high-flow rates and outstanding oil filtration to keep your motor...KN170- SKU:
- KN170
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- COLOR/FINISH:
- BLACK
- FEATURES:
- INCLUDES NUT
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- MODEL:
- WRENCH-OFF
- PRODUCT NAME:
- OIL FILTER
- TYPE:
- SPIN-ON
- LENGTH METRIC:
- 94 MM
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
- BASE FINISH:
- COATED
- STYLE:
- PREMIUM
- UNITS:
- EACH
$17.99 -
COLONY Cylinder Stud Set - 1930-1977 Big Twin 8856-8
COLONY
$39.95Heat-treated for strength and durability, Equal or surpass original equipment, Made in the U.S.A.DS189956- SKU:
- DS189956
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- UNITS:
- 8 PACK
- TYPE:
- CYLINDER
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- STUD SET
- RIDING STYLE:
- STREET
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
COLONY Cylinder Stud Set - 1978-1984 Big Twin 8857-8
COLONY
$39.95Heat-treated for strength and durability, Equal or surpass original equipment, Made in the U.S.A.DS189955- SKU:
- DS189955
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- TYPE:
- CYLINDER
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- STUD SET
- RIDING STYLE:
- STREET
- UNITS:
- 8 PACK
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
EMGO Oil Filter - Black 10-82410
EMGO
$9.61Only the highest-quality paper, metal and rubber are used to manufacture these top-grade filters, Bonded with extra strong epoxy (polyvinyl acetate) for a long life, Clean oil makes engines last longer1082410- SKU:
- 1082410
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- BASE COLOR:
- BLACK
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- OIL FILTER
- TYPE:
- SPIN-ON
$9.61 -
On Sale
COMETIC Complete Gasket Kit - Evo C9846F
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,...09340799- SKU:
- 09340799
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 0.76 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
MSRP: $356.95Now: $336.00Was: $356.95 -
On Sale
COMETIC Motor Gasket Kit - 1200 XL - .030" C9855F
COMETIC
MSRP: $202.60Now: $190.00Was: $202.60Every 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,...09340800- SKU:
- 09340800
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- UNITS:
- KIT
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
MSRP: $202.60Now: $190.00Was: $202.60 -
On Sale
COMETIC Complete Gasket Kit - 1200 XL C9757F
COMETIC
MSRP: $265.60Now: $250.00Was: $265.60Every 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,...09340805- SKU:
- 09340805
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
MSRP: $265.60Now: $250.00Was: $265.60Qty in Cart: 0Quantity:Price:MSRP: $265.60Now: $250.00Was: $265.60Subtotal: -
On Sale
COMETIC Complete Gasket Kit - Softail C9184
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,...09341229- SKU:
- 09341229
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- UNITS:
- KIT
- MATERIAL:
- STEEL
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,875'
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
MSRP: $287.65Now: $270.00Was: $287.65 -
On Sale
COMETIC Primary Case O-Ring C9441
COMETIC
Now: $17.00Was: $17.90High-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.09350161- SKU:
- 09350161
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- NITRILE RUBBER
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
- APPLICATION:
- INNER PRIMARY
- RIDING STYLE:
- STREET
Now: $17.00Was: $17.90 -
On Sale
COMETIC Starter Shaft Seal C9261
COMETIC
Now: $14.00Was: $14.80Made in the U.S.A.09350163- SKU:
- 09350163
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- STARTER SHAFT
- UNITS:
- 5 PACK
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
Now: $14.00Was: $14.80 -
COMETIC Cam Sensor O-Ring C9627
COMETIC
$5.00High-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.09350164- SKU:
- 09350164
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- CAM POSITION SENSOR
- UNITS:
- 10 PACK
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
$5.00 -
On Sale
COMETIC Top End Gasket Kit - M8 C10217
COMETIC
MSRP: $240.40Now: $226.00Was: $240.40EST (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...09346323- SKU:
- 09346323
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE:
- 3,937'
- PRODUCT NAME:
- GASKET
MSRP: $240.40Now: $226.00Was: $240.40 -
On Sale
COMETIC Top End Gasket Kit - M8 C10223
COMETIC
MSRP: $240.40Now: $226.00Was: $240.40EST (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...09346325- SKU:
- 09346325
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- BORE SIZE:
- 4,250'
- BORE SIZE IMPERIAL:
- 4.250'
- RIDING STYLE:
- STREET
MSRP: $240.40Now: $226.00Was: $240.40 -
On Sale
COMETIC Motor Gasket Kit - M8 C10250
COMETIC
MSRP: $267.70Now: $252.00Was: $267.70EST (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...09346326- SKU:
- 09346326
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE SIZE:
- 3,937'
- BORE SIZE IMPERIAL:
- 3.937'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $267.70Now: $252.00Was: $267.70Qty in Cart: 0Quantity:Price:MSRP: $267.70Now: $252.00Was: $267.70Subtotal: -
COMETIC Pushrod Cover Seals C9598
COMETIC
$7.00Contains the correct seals and O-rings needed for a complete rebuild09344713- SKU:
- 09344713
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 25 PACK
- RIDING STYLE:
- STREET
- TYPE:
- PUSHROD COVER
$7.00 -
On Sale
COMETIC Head Gasket - .040" - Twin Cam C9726
COMETIC
MSRP: $61.90Now: $58.00Was: $61.90Center 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...09340003- SKU:
- 09340003
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- THICKNESS:
- 1,02 MM (0,040')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- BORE SIZE:
- 4,000'
- PRODUCT NAME:
- GASKET
- MATERIAL:
- LAYERED STEEL
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
MSRP: $61.90Now: $58.00Was: $61.90
