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 Seal C10209
COMETIC
$15.80COMETIC Seal C10209High-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.09350998- SKU:
- 09350998
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- CRANKCASE
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- PRODUCT NAME:
- SEAL
$15.80 -
COMETIC O-Ring C10212
COMETIC
$6.80COMETIC O-Ring C10212Made in the U.S.A.09351000- SKU:
- 09351000
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- O-RING
- APPLICATION:
- OIL LINE
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$6.80 -
COMETIC Head Gasket - .043" C9239
COMETIC
$56.65COMETIC Head Gasket .043" C9239Center 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...09350397- SKU:
- 09350397
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- CFM
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.043'
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,043'
- TYPE:
- CYLINDER HEAD
$56.65Qty in Cart: 0Quantity:Price:$56.65Subtotal: -
COMETIC Head Gasket - .045" C9985-045
COMETIC
$61.90COMETIC Head Gasket .045" C9985-045Center 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...09350398- SKU:
- 09350398
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- BORE SIZE:
- 3,625'
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- STEEL
- THICKNESS:
- 0,045'
- THICKNESS IMPERIAL:
- 0.045'
- TYPE:
- CYLINDER HEAD
$61.90 -
COMETIC Starter O-Ring - Big Twin C9433F1
COMETIC
$4.95COMETIC Starter O-Ring Big Twin C9433F1High-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.09350850- SKU:
- 09350850
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- STARTER HOUSING
- UNITS:
- EACH
- MATERIAL:
- BUNA RUBBER
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
$4.95Qty in Cart: 0Quantity:Price:$4.95Subtotal: -
COMETIC Clutch Release Gear Seal C9364-1
COMETIC
$3.95COMETIC Clutch Release Gear Seal C9364-1High-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.09350827- SKU:
- 09350827
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- APPLICATION:
- RELEASE ROD
- MATERIAL:
- VITON
$3.95 -
COMETIC Line Sleeve Oil Seal C9365
COMETIC
$7.20COMETIC Line Sleeve Oil Seal C9365Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle, Made in the U.S.A.09350828- SKU:
- 09350828
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- APPLICATION:
- OIL LINE
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
$7.20Qty in Cart: 0Quantity:Price:$7.20Subtotal: -
COMETIC Sprocket Shaft Seal C9366-1
COMETIC
$5.95COMETIC Sprocket Shaft Seal C9366-1High-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.09350829- SKU:
- 09350829
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- SPROCKET SHAFT
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$5.95 -
COMETIC Clutch Gear Seal C9368-1
COMETIC
$5.95COMETIC Clutch Gear Seal C9368-1High-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.09350831- SKU:
- 09350831
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- APPLICATION:
- CLUTCH GEAR
- MATERIAL:
- VITON
$5.95Qty in Cart: 0Quantity:Price:$5.95Subtotal: -
COMETIC Pushrod Cover Seals C9369
COMETIC
$11.60COMETIC Pushrod Cover Seals C9369Made in the U.S.A.09350832- SKU:
- 09350832
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- PUSHROD COVER
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
$11.60 -
COMETIC Shifter Lever Shaft Seal C9370-1
COMETIC
$4.95COMETIC Shifter Lever Shaft Seal C9370-1High-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.09350833- SKU:
- 09350833
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SEAL
- MATERIAL:
- VITON
- APPLICATION:
- SHIFTER SHAFT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$4.95 -
COMETIC Clutch Hub Seal C9371-1
COMETIC
$6.95COMETIC Clutch Hub Seal C9371-1High-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.09350834- SKU:
- 09350834
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CLUTCH HUB
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- INSIDE DIAMETER METRIC:
- 33 MM
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- OUTSIDE DIAMETER METRIC:
- 47 MM
- THICKNESS METRIC:
- 7 MM
$6.95Qty in Cart: 0Quantity:Price:$6.95Subtotal: -
COMETIC Valve Stem Seal C9424-1
COMETIC
$4.95COMETIC Valve Stem Seal C9424-1High-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.09350835- SKU:
- 09350835
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- MATERIAL:
- VITON
- OUTSIDE DIAMETER IMPERIAL:
- 0.625'
- TYPE:
- VALVE STEM
- RIDING STYLE:
- STREET
$4.95 -
COMETIC Carb Backplate O-Ring C9686
COMETIC
$6.25COMETIC Carb Backplate O-Ring C9686Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle, Made in the U.S.A.09350373- SKU:
- 09350373
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CARBURETOR BACKING PLATE
- RIDING STYLE:
- STREET
- MATERIAL:
- NITRILE
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
$6.25 -
COMETIC Engine Crankcase Seal C9682
COMETIC
$49.20COMETIC Engine Crankcase Seal C9682Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle, Made in the U.S.A.09350374- SKU:
- 09350374
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- CRANKCASE
- MATERIAL:
- VITON
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SEAL
$49.20 -
COMETIC Trans Shifter Drum Seal C9354F5
COMETIC
$9.80COMETIC Trans Shifter Drum Seal C9354F5Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle, Made in the U.S.A.09350376- SKU:
- 09350376
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- 5 PACK
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- APPLICATION:
- SHIFTER SHAFT
- APPLICATION:
- TRANSMISSION
$9.80Qty in Cart: 0Quantity:Price:$9.80Subtotal: -
COMETIC Interconnect Seal C9004
COMETIC
$18.00COMETIC Interconnect Seal C9004Made in the U.S.A.09350377- SKU:
- 09350377
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- APPLICATION:
- INTERCONNECT
- MATERIAL:
- VITON
$18.00Qty in Cart: 0Quantity:Price:$18.00Subtotal: -
COMETIC Valve Stem Seal C9153
COMETIC
$76.00COMETIC Valve Stem Seal C9153High-quality products for long-term reliability, Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle09350137- SKU:
- 09350137
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- TYPE:
- VALVE STEM
- MATERIAL:
- VITON
- UNITS:
- 25 PACK
- PRODUCT NAME:
- SEAL
$76.00 -
COMETIC Valve Stem Seal - Viton C9166
COMETIC
$24.20COMETIC Valve Stem Seal Viton C9166High-quality products for long-term reliability, Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle09350138- SKU:
- 09350138
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- TYPE:
- VALVE STEM
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$24.20 -
COMETIC O-Ring & Valve O-Ring - Twin Cam C9586
COMETIC
$6.95COMETIC O-Ring & Valve O-Ring Twin Cam C9586O-rings are made of a high-temperature Viton® rubber to seal in even the harshest environments, Package includes seals and O-rings for one application, Made in the U.S.A.09350139- SKU:
- 09350139
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- PUSHROD COVER
- APPLICATION:
- PUSHROD TUBE
- MATERIAL:
- VITON
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL
$6.95
