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 Chain Gasket 60540-36-K
JAMES GASKET
$42.95A properly sealed engine depends on gaskets that can withstand sustained pressure cycles and temperature fluctuations without degradation. The JAMES GASKET Chain Gasket 60540-36-K meets or exceeds...DS174968- SKU:
- DS174968
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- FEATURES:
- BEADED
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
$42.95 -
JAMES GASKET Lower Cover Gasket Cork - Big Twin 17355-84
JAMES GASKET
$18.60A quality lower cover gasket is the foundation of a reliable, leak-free engine seal on your Big Twin. JAMES Gasket's cork construction with elastomer beading eliminates seepage at the crankcase,...DS174917- SKU:
- DS174917
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- MATERIAL:
- CORK
- MOUNTING POSITION:
- LOWER
- PRODUCT NAME:
- GASKET
- TYPE:
- ROCKER BOX
$18.60Qty in Cart: 0Quantity:Price:$18.60Subtotal: -
JAMES GASKET Thick Fuel Cap Gasket 61111-77
JAMES GASKET
$16.50A fuel cap gasket is a critical seal that prevents fuel vapors from escaping your tank while protecting against contamination and fuel system pressure loss. A degraded or worn gasket compromises both...DS174516- SKU:
- DS174516
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- STYLE:
- THICK
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- TYPE:
- FUEL CAP
$16.50 -
JAMES GASKET Intake Manifold Gasket - Big Twin 27411-40
JAMES GASKET
$13.80A leaking intake manifold gasket compromises engine efficiency, increases emissions, and can lead to costly internal damage if left unchecked. The JAMES GASKET Intake Manifold Gasket kit provides a...DS174490- SKU:
- DS174490
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- INTAKE MANIFOLD
- UNITS:
- 10 PACK
$13.80 -
JAMES GASKET Upper Rocker Cover - XL 17354-86-A
JAMES GASKET
$42.80A properly sealed rocker cover is critical to preventing oil leakage and maintaining crankcase ventilation—two factors that directly impact engine reliability and longevity. The JAMES GASKET Upper...DS174358- SKU:
- DS174358
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- 5 PACK
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- GASKET
- TYPE:
- ROCKER BOX
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- UPPER
$42.80Qty in Cart: 0Quantity:Price:$42.80Subtotal: -
JAMES GASKET Bendix Gasket Kit BENDIX
JAMES GASKET
$12.95If you're running Bendix carburetors on your race engine or classic build, worn gaskets will compromise fuel atomization and create vacuum leaks that kill performance. This OEM-spec gasket kit...DS173528- SKU:
- DS173528
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- GRAPHITE
- RIDING STYLE:
- STREET
- TYPE:
- CARBURETOR
- UNITS:
- KIT
$12.95 -
JAMES GASKET Oil Pump Cover Gasket 26276-80-M
JAMES GASKET
$6.90An oil pump cover gasket is a critical seal that prevents oil seepage at one of your engine's most vital lubrication points. Without proper sealing, you risk oil loss, reduced engine protection, and...DS173464- SKU:
- DS173464
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- MYLAR
- STYLE:
- COVER
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$6.90Qty in Cart: 0Quantity:Price:$6.90Subtotal: -
COMETIC Rocker Gasket - EST - XL C9765
COMETIC
$65.05Rocker box gasket failure leads to oil leaks, contamination, and potential engine damage—problems that compound quickly in high-performance applications. The COMETIC Rocker Gasket - EST - XL C9765...DS172077- SKU:
- DS172077
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MODEL:
- EST
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$65.05 -
COMETIC Top End Gasket Kit - XL1200 - EST C9762
COMETIC
$142.75Top-end gasket failures can sideline your engine and compromise performance—especially in high-heat applications where standard gaskets can't handle the demands. The COMETIC EST C9762 kit eliminates...DS172074- SKU:
- DS172074
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.500'
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE:
- 3,500'
- DISPLACEMENT:
- 1200 CC
- MATERIAL:
- RUBBER
- MATERIAL:
- STAINLESS STEEL
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
$142.75Qty in Cart: 0Quantity:Price:$142.75Subtotal: -
COMETIC Rocker Gasket - EST - Big Twin C9752
COMETIC
$65.05Rocker box gasket failures lead to oil seepage, loss of compression integrity, and costly engine downtime. The COMETIC Rocker Gasket kit eliminates guesswork by bundling all necessary seals and...DS172064- SKU:
- DS172064
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MODEL:
- EST
- TYPE:
- ROCKER BOX
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$65.05 -
COMETIC Copper Base Gasket - Big Twin C9029
COMETIC
$28.30A cylinder base gasket is your first line of defense against compression loss and oil seepage—two issues that degrade engine performance and reliability. The Cometic Copper Base Gasket C9029 delivers...DS172055- SKU:
- DS172055
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- COPPER
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- STANDARD
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,41 MM (0,016')
- THICKNESS IMPERIAL:
- 0.016'
- UNITS:
- PAIR
- TYPE:
- CYLINDER BASE
- THICKNESS METRIC:
- 0.41 MM
$28.30 -
COMETIC Tappet Cover Gasket - Twin Cam C9578
COMETIC
$5.40A leaking tappet cover gasket compromises engine bay cleanliness and can lead to oil seepage onto critical components. The COMETIC Tappet Cover Gasket C9578 is engineered for Twin Cam applications,...DS172047- SKU:
- DS172047
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MOUNTING POSITION:
- FRONT
- MOUNTING POSITION:
- REAR
- THICKNESS METRIC:
- 0.51 MM
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,51 MM (0,020')
- RIDING STYLE:
- STREET
- TYPE:
- TAPPET BLOCK
- MATERIAL:
- FIBER
- THICKNESS IMPERIAL:
- 0,020'
- UNITS:
- 10 PACK
$5.40 -
COMETIC Rocker Cover Gasket - .020" - Twin Cam C9577
COMETIC
$62.70A worn rocker cover gasket is an easy source of oil leaks that compromise engine cleanliness and can lead to costly damage if left unaddressed. The COMETIC C9577 delivers reliable sealing with a...DS172031- SKU:
- DS172031
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- ROCKER COVER
- MATERIAL:
- VITON
- UNITS:
- 10 PACK
$62.70 -
DRAG SPECIALTIES Braided Oil/Fuel Line - Stainless Steel - 1/4" - 6' 0966615-HC9
DRAG SPECIALTIES
$47.65Braided stainless steel lines eliminate the reliability concerns of rubber fuel and oil lines by resisting degradation, heat, and pressure spikes common in high-performance applications. Whether...DS096615- SKU:
- DS096615
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- HOSE
- BASE FINISH:
- NATURAL
- INSIDE DIAMETER METRIC:
- 6.4 MM
- LENGTH IMPERIAL:
- 6'
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- EACH
- COLOR/FINISH:
- STAINLESS STEEL
- INSIDE DIAMETER IMPERIAL:
- 1/4'
- LENGTH METRIC:
- 183 CM
- TYPE:
- FUEL
- HOSE SIZE:
- -4
- STYLE:
- BRAIDED
$47.65Qty in Cart: 0Quantity:Price:$47.65Subtotal: -
COMETIC Viton O-Ring C10190
COMETIC
$7.60Engine seals are only as reliable as their materials—and Viton O-rings set the gold standard for high-temperature, high-pressure applications. If you're building a forced-induction engine, running...09350976- SKU:
- 09350976
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- APPLICATION:
- MAP SENSOR
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$7.60 -
COMETIC Viton O-Ring C10189
COMETIC
$7.60Fuel system sealing demands uncompromising reliability, and a failed O-ring can compromise your entire fuel delivery system. The COMETIC Viton O-Ring C10189 resists fuel degradation, thermal cycling,...09350975- SKU:
- 09350975
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- APPLICATION:
- BREATHER
- PRODUCT NAME:
- O-RING
- MATERIAL:
- VITON
$7.60 -
COMETIC Kiehin Manifold C9425
COMETIC
$5.30The COMETIC Kiehin Manifold C9425 delivers precise intake routing and optimized fuel-air mixture distribution for engines demanding reliable, repeatable performance. Whether you're building a...09350222- SKU:
- 09350222
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- FIBER
- PRODUCT NAME:
- GASKET
- TYPE:
- INTAKE MANIFOLD
- UNITS:
- 10 PACK
- THICKNESS IMPERIAL:
- 0.031'
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,031'
$5.30Qty in Cart: 0Quantity:Price:$5.30Subtotal: -
COMETIC Bendix Manifold Gasket C9417
COMETIC
$4.90A quality manifold gasket is the seal between your intake manifold and cylinder head—get this wrong, and you're looking at vacuum leaks, rough idle, and lost performance. The COMETIC Bendix C9417...09350221- SKU:
- 09350221
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- FIBER
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.020'
- TYPE:
- INTAKE MANIFOLD
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.51 MM
- THICKNESS:
- 0,51 MM (0,020')
$4.90Qty in Cart: 0Quantity:Price:$4.90Subtotal: -
COMETIC Oil Pan Gasket - AFM C9265F
COMETIC
$36.70An oil pan gasket is a critical seal that prevents leaks and maintains proper oil circulation—a failure here means potential engine damage and costly downtime. The COMETIC C9265F uses proven Aluminum...09350218- SKU:
- 09350218
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- OIL PAN
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- TYPE:
- TRANSMISSION
$36.70 -
COMETIC Drain Plug Washer C9403
COMETIC
$9.50A worn or damaged drain plug washer is an easy way to develop slow oil leaks that compromise engine cleanliness and waste oil over time. The COMETIC C9403 drain plug washer eliminates sealing...09350216- SKU:
- 09350216
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- FIBER
- MATERIAL:
- VULCANIZED
- THICKNESS IMPERIAL:
- 0.015'
- UNITS:
- 10 PACK
- APPLICATION:
- DRAIN PLUG
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,015'
$9.50
