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 Drain Plug Washer C9498
COMETIC
$6.70High-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.09350185- SKU:
- 09350185
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- NYLON
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,063'
- THICKNESS IMPERIAL:
- 0.063'
- UNITS:
- 10 PACK
- APPLICATION:
- DRAIN PLUG
- PRODUCT NAME:
- WASHER
$6.70 -
COMETIC Counter Shaft O-Ring C9529
COMETIC
$6.40High-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.09350187- SKU:
- 09350187
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- APPLICATION:
- COUNTERSHAFT
- MATERIAL:
- BUNA RUBBER
$6.40 -
COMETIC Right Mainshaft O-Ring C9495
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.09350188- SKU:
- 09350188
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- 25 PACK
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- APPLICATION:
- TRANSMISSION
$5.30 -
COMETIC Mainshaft Quad Seal C9361
COMETIC
$10.60High-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.09350189- SKU:
- 09350189
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- APPLICATION:
- TRANSMISSION
$10.60 -
COMETIC Filler Plug O-Ring C9263
COMETIC
$4.20Made in the U.S.A.09350191- SKU:
- 09350191
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- APPLICATION:
- FILLER PLUG
$4.20 -
COMETIC Clutch Cable O-Ring C9447
COMETIC
$3.20Made in the U.S.A.09350192- SKU:
- 09350192
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- VITON
- APPLICATION:
- CLUTCH CABLE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
$3.20 -
COMETIC Head Gasket - .03" - Evo - 3.5" C9688
COMETIC
$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...DS172086- SKU:
- DS172086
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- LAYERED STEEL
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 0.76 MM
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,76 MM (0,030')
$61.90 -
COMETIC Head Gasket - .03"- Evo - 3.625" C9690
COMETIC
$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...DS172088- SKU:
- DS172088
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- BORE SIZE IMPERIAL:
- 3.670'
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,76 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER HEAD
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- BORE SIZE:
- 3,670'
$61.90 -
COMETIC Head Gasket - .030" - 95" - Twin Cam C9721
COMETIC
$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...DS172104- SKU:
- DS172104
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE SIZE:
- 3,875'
- PRODUCT NAME:
- GASKET
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,76 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE IMPERIAL:
- 3.875'
- TYPE:
- CYLINDER HEAD
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
- UNITS:
- PAIR
$61.90 -
COMETIC Head Gasket - .030" - 88" - Twin Cam C9790
COMETIC
$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...DS172106- SKU:
- DS172106
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- LAYERED STEEL
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- BORE SIZE:
- 3,750'
- THICKNESS:
- 0,76 MM (0,030')
$61.90 -
COMETIC Primary Gasket C9307F5
COMETIC
$120.50Cometic'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%...20111487- SKU:
- 20111487
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MOUNTING POSITION:
- OUTER
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- PRIMARY COVER
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- THICKNESS:
- 1,52 MM (0,060')
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
$120.50 -
COMETIC Tappet Screw O-Ring C9448
COMETIC
$4.20High-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.09350225- SKU:
- 09350225
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- APPLICATION:
- TAPPET GUIDE
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$4.20 -
COMETIC Upper Tappet Block O-Ring C9443
COMETIC
$8.40High-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.09350226- SKU:
- 09350226
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- APPLICATION:
- UPPER TAPPET BLOCK
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
$8.40 -
COMETIC Lower Pushrod O-Ring C9295
COMETIC
$14.10High-quality products for long-term reliability, Manufactured from premium fuel-resistant materials, Viton® gaskets feature a stainless steel core with a .001" -thick coating of Viton rubber on both sides, Made in the U.S.A.09350228- SKU:
- 09350228
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- NITRILE RUBBER
- UNITS:
- 10 PACK
- APPLICATION:
- PUSHROD COVER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
$14.10 -
COMETIC Tappet Pin Cover O-Ring C9296
COMETIC
$3.95High-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.09350229- SKU:
- 09350229
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- TAPPET COVER
- MATERIAL:
- NITRILE
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
$3.95 -
COMETIC Point Cover Seal C9355
COMETIC
$8.20Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle, Made in the U.S.A.09350230- SKU:
- 09350230
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- UNITS:
- 5 PACK
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- APPLICATION:
- CAM COVER
- PRODUCT NAME:
- SEAL
$8.20 -
COMETIC Inspection Cover O-Ring C9439
COMETIC
$6.40High-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.09350232- SKU:
- 09350232
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- APPLICATION:
- CHAIN INSPECTION COVER
- UNITS:
- 10 PACK
- MATERIAL:
- NITRILE RUBBER
$6.40 -
COMETIC Motor Sprocket Seal C9353
COMETIC
$17.20COMETIC Motor Sprocket Seal09350234- SKU:
- 09350234
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- SEAL
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- 5 PACK
$17.20 -
COMETIC Starter Gasket - AFM C9312F
COMETIC
$6.10Made in the U.S.A.09350238- SKU:
- 09350238
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- THICKNESS:
- 0,032'
- TYPE:
- MOTOR
- TYPE:
- STARTER
- THICKNESS IMPERIAL:
- 0.032'
- RIDING STYLE:
- STREET
$6.10Qty in Cart: 0Quantity:Price:$6.10Subtotal: -
COMETIC Aluminum Inner Spacer Gasket C9199F5
COMETIC
$106.00Made in the U.S.A.09350241- SKU:
- 09350241
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- PRIMARY SPACER
- MATERIAL:
- SILICONE
- MOUNTING POSITION:
- INNER
- UNITS:
- 5 PACK
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$106.00
