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 Oil Line O-Ring - Softail 11326
JAMES GASKET
$8.40JAMES GASKET Oil Line O-Ring Softail 11326Made in the U.S.A.09350281- SKU:
- 09350281
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 10 PACK
- APPLICATION:
- MOTOR
- APPLICATION:
- OIL LINE
- PRODUCT NAME:
- O-RING
$8.40 -
JAMES GASKET Interconnect Oil Seal 45359-00
JAMES GASKET
$20.30JAMES GASKET Interconnect Oil Seal 45359-00Made in the U.S.A.09350252- SKU:
- 09350252
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CHAIN GUIDE SUPPORT
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- APPLICATION:
- ENGINE BALANCER
- RIDING STYLE:
- STREET
$20.30 -
JAMES GASKET Oil Retain Gasket - XL 35169-52-F
JAMES GASKET
$7.80JAMES GASKET Oil Retain Gasket XL 35169-52-FFeatures and aluminum core coated on two sides withexpanded nitrile rubber than coated with a silicone release coating to ensure a positive seal with excellent release characteristic upon disassembly.09344643- SKU:
- 09344643
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- FOAMET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL SEAL RETAINER
$7.80 -
JAMES GASKET Oil Pump Gasket Kit HVHP
JAMES GASKET
$20.95JAMES GASKET Oil Pump Gasket Kit HVHPComes with new components that allow you to totally rebuild/rebush most oil pumps, Made in the U.S.A.09341552- SKU:
- 09341552
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- OIL PUMP
$20.95 -
COMETIC Head Gasket - Standard - .040" C9984
COMETIC
$61.90COMETIC Head Gasket Standard .040" C9984Center 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...09340794- SKU:
- 09340794
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- MATERIAL:
- LAYERED STEEL
- TYPE:
- CYLINDER HEAD
- THICKNESS IMPERIAL:
- 0,040'
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,02 MM (0,040')
$61.90Qty in Cart: 0Quantity:Price:$61.90Subtotal: -
COMETIC Complete Gasket Kit C9748F
COMETIC
$356.95COMETIC Complete Gasket Kit C9748FEvery 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)...09340815- SKU:
- 09340815
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
$356.95 -
COMETIC Complete Gasket Kit - FL/FLH C9966
COMETIC
$190.00COMETIC Complete Gasket Kit FL/FLH C9966Every 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...09340816- SKU:
- 09340816
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,437'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.437'
- PRODUCT NAME:
- GASKET KIT
$190.00 -
COMETIC Top End Gasket - 3-13/16" C9969
COMETIC
$135.40COMETIC Top End Gasket 3-13/16" C9969EST (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...09340820- SKU:
- 09340820
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE:
- 3,8125'
- MATERIAL:
- FOAM
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- MATERIAL:
- VITON
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.8125'
- UNITS:
- KIT
$135.40 -
COMETIC Trans Gasket - 5 Speed C9466
COMETIC
$86.05COMETIC Trans Gasket 5 Speed C9466High 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.09340821- SKU:
- 09340821
- Availability:
- Ships Same Business Day
- Weight:
- 1.14 LBS
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- 5-SPEED
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
$86.05Qty in Cart: 0Quantity:Price:$86.05Subtotal: -
COMETIC Trans Gasket - 5 Speed C9467
COMETIC
$102.85COMETIC Trans Gasket 5 Speed C9467High 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.09340822- SKU:
- 09340822
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- STYLE:
- 5-SPEED
- UNITS:
- KIT
$102.85Qty in Cart: 0Quantity:Price:$102.85Subtotal: -
COMETIC Trans Gasket - FXD C9468
COMETIC
$56.65COMETIC Trans Gasket FXD C9468High 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.09340823- SKU:
- 09340823
- Availability:
- Ships Same Business Day
- Weight:
- 0.53 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- STYLE:
- 5-SPEED
$56.65Qty in Cart: 0Quantity:Price:$56.65Subtotal: -
COMETIC Trans Gasket - Big Twin C9469
COMETIC
$81.85COMETIC Trans Gasket Big Twin C9469High 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.09340824- SKU:
- 09340824
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$81.85 -
COMETIC Trans Gasket - FXD C9640
COMETIC
$47.20COMETIC Trans Gasket FXD C9640High 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.09340825- SKU:
- 09340825
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$47.20Qty in Cart: 0Quantity:Price:$47.20Subtotal: -
COMETIC Trans Gasket - Twin Cam C9639
COMETIC
$47.20COMETIC Trans Gasket Twin Cam C9639High 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.09340826- SKU:
- 09340826
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$47.20Qty in Cart: 0Quantity:Price:$47.20Subtotal: -
COMETIC Trans Gasket - Big Twin C9464F
COMETIC
$45.10COMETIC Trans Gasket Big Twin C9464FHigh 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.09340827- SKU:
- 09340827
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
$45.10 -
COMETIC Trans Gasket - 4 Speed C9465
COMETIC
$67.15COMETIC Trans Gasket 4 Speed C9465High 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.09340828- SKU:
- 09340828
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION
$67.15 -
COMETIC One Piece Rocker Base - Evo C9865
COMETIC
$22.00COMETIC One Piece Rocker Base Evo C9865Viton gaskets feature a stainless steel core with a .001"-thick coating of Viton rubber on both sides., Made in the U.S.A.09340001- SKU:
- 09340001
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- ROCKER BOX
$22.00 -
COMETIC Base Gasket - Evo - 1340 - .020" C9870
COMETIC
$33.55COMETIC Base Gasket Evo 1340 .020" C9870Outer 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...09340004- SKU:
- 09340004
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD
- THICKNESS METRIC:
- 0.51 MM
- BORE SIZE IMPERIAL:
- 3.8125'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
$33.55 -
COMETIC Base Gasket - Evo - 4" - .010" C9871
COMETIC
$33.55COMETIC Base Gasket Evo 4" .010" C9871Outer 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...09340005- SKU:
- 09340005
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- LAYERED STEEL
- MATERIAL:
- RUBBER
- TYPE:
- CYLINDER BASE
- BORE SIZE IMPERIAL:
- 4.000'
- STYLE:
- STANDARD
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.25 MM
$33.55Qty in Cart: 0Quantity:Price:$33.55Subtotal: -
COMETIC Base Gasket - Evo - 4" - .020" C9872
COMETIC
$33.55COMETIC Base Gasket Evo 4" .020" C9872Outer 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...09340006- SKU:
- 09340006
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS METRIC:
- 0.51 MM
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- STYLE:
- STANDARD
$33.55
