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 Breather Baffle Gasket C9580
COMETIC
$8.20A worn or damaged breather baffle gasket compromises crankcase ventilation efficiency, allowing pressure buildup and potential oil leakage that can damage seals and contaminate your engine bay. The COMETIC C9580 is a direct replacement gasket engineered...09341334- SKU:
- 09341334
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- MATERIAL:
- FIBER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,79 MM (0,031')
- UNITS:
- 10 PACK
- THICKNESS IMPERIAL:
- 0,031'
- TYPE:
- BREATHER
$8.20 -
COMETIC Lifter Cover Gasket - Twin Cam C9578F
COMETIC
$5.40A failing lifter cover gasket leads to oil seepage, potential engine contamination, and costly internal damage if left unchecked. The COMETIC C9578F is precision-engineered to seal properly under high heat and pressure cycles, giving you reliable leak...09341335- SKU:
- 09341335
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MOUNTING POSITION:
- FRONT
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.032'
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- TAPPET BLOCK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- UNITS:
- 10 PACK
$5.40 -
COMETIC Exhaust Gasket - Race C9719
COMETIC
$32.10Exhaust gasket failure is one of the most common sources of air leaks that compromise engine efficiency and create costly downtime. The COMETIC C9719 Race Exhaust Gasket delivers the high-temperature reliability and precision sealing you need to keep...09341336- SKU:
- 09341336
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- GRAPHITE
- TYPE:
- EXHAUST
- UNITS:
- 10 PACK
$32.10 -
COMETIC Oil Pan Gasket - Dyna C9646F
COMETIC
$73.30An oil pan gasket is critical to preventing costly leaks that compromise engine health and cleanliness. The COMETIC C9646F uses a proven Aluminum Foamette construction that eliminates the need for messy gasket sealer while delivering reliable, long-term...09341338- SKU:
- 09341338
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- OIL PAN
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
$73.30 -
COMETIC Oil Pan Gasket - FLT C9647F
COMETIC
$73.30Oil pan gaskets are critical sealing components that prevent leaks and maintain proper oil containment under varying engine temperatures and pressures. The COMETIC C9647F uses advanced Aluminum Foamette construction to deliver superior sealing...09341339- SKU:
- 09341339
- Availability:
- Ships Same Business Day
- Weight:
- 0.54 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- TYPE:
- OIL PAN
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- TRANSMISSION
$73.30 -
COMETIC Primary Gasket C9179F5
COMETIC
$120.50A primary gasket failure can compromise your entire engine's sealing integrity, leading to oil weeping, contamination, and potential performance loss. The COMETIC Primary Gasket C9179F5 delivers the precision engineering and material quality needed for a...09341340- SKU:
- 09341340
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- PRIMARY
- UNITS:
- 5 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- OUTER
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
$120.50 -
COMETIC Pushrod O-Ring Kit - XL C9143
COMETIC
$18.85Pushrod seal leaks compromise oil pressure and engine reliability—especially in high-heat, high-RPM environments where standard seals fail. The COMETIC Pushrod O-Ring Kit delivers proven sealing performance with Viton® material engineered to withstand...09350135- SKU:
- 09350135
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- PUSHROD COVER
- UNITS:
- KIT
- APPLICATION:
- PUSHROD TUBE
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$18.85 -
COMETIC Oil Change Gasket Kit C10156
COMETIC
$14.95A quality oil change gasket kit is foundational to preventing leaks and maintaining proper engine sealing during routine maintenance. The COMETIC C10156 uses proprietary AFM material that resists extreme temperatures and recovers its shape consistently,...09345073- SKU:
- 09345073
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$14.95Qty in Cart: 0Quantity:Price:$14.95Subtotal: -
COMETIC Clutch Release Cover Gasket C9526F
COMETIC
$13.90A quality clutch release cover gasket is critical to preventing fluid leaks and maintaining consistent hydraulic pressure in your clutch system. The COMETIC C9526F uses a proven aluminum foamette construction that eliminates the need for messy gasket...09341384- SKU:
- 09341384
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.81 MM
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
- UNITS:
- 10 PACK
- TYPE:
- CLUTCH RELEASE COVER
$13.90 -
COMETIC Head Gasket - 4.125" - .030" C9910
COMETIC
$61.90A quality head gasket is non-negotiable for engine reliability, and the COMETIC C9910 delivers the precision sealing your high-performance build demands. Its multi-layer steel construction with load control embossments minimizes bore distortion while...09340789- SKU:
- 09340789
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,76 MM (0,030')
- BORE SIZE:
- 4,125'
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- TYPE:
- CYLINDER HEAD
- BORE SIZE IMPERIAL:
- 4.125'
- THICKNESS METRIC:
- 0.76 MM
$61.90 -
COMETIC Derby Cover Gasket - Twin Cam C9997F5
COMETIC
$21.30A quality derby cover gasket is essential for preventing oil seepage around your Twin Cam's primary cover, which can lead to cosmetic staining and potential drivetrain damage if left unchecked. Cometic's gaskets are manufactured to OEM tolerances with...09340788- SKU:
- 09340788
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS IMPERIAL:
- 0.060'
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- DERBY COVER
$21.30Qty in Cart: 0Quantity:Price:$21.30Subtotal: -
COMETIC Foot Peg Stud Gasket C9401
COMETIC
$10.20Foot peg studs are a high-wear point in any racing application—repeated vibration, thermal cycling, and load stress can compromise gasket integrity and lead to oil seepage. The COMETIC C9401 is a precision-engineered replacement gasket that restores a...09350233- SKU:
- 09350233
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,025'
- THICKNESS IMPERIAL:
- 0.025'
- MATERIAL:
- VULCANIZED
- TYPE:
- SHIFTER STUD BOSS
- UNITS:
- 10 PACK
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- GASKET
$10.20Qty in Cart: 0Quantity:Price:$10.20Subtotal: -
COMETIC Head Gasket - .04"- Evo - 3.5" C9689
COMETIC
$61.90A quality head gasket is the foundation of cylinder head sealing—failure here means catastrophic engine damage. The COMETIC C9689 MLS design delivers the precision bore control and load consistency that high-performance engines demand, whether you're...DS172087- SKU:
- DS172087
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- PAIR
- BORE SIZE:
- 3,500'
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 1,02 MM (0,040')
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- LAYERED STEEL
- THICKNESS IMPERIAL:
- 0,040'
$61.90 -
EASTERN MOTORCYCLE PARTS Right Case Bearings A-24650-55
EASTERN MOTORCYCLE PARTS
$39.95Worn or damaged right case bearings are a common failure point that directly impacts engine reliability and longevity. Installing a quality OEM-spec bearing assembly eliminates play in your crankshaft, restores proper oil distribution, and prevents...09500333- SKU:
- 09500333
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- BEARING
- APPLICATION:
- CRANKCASE
- RIDING STYLE:
- STREET
- TYPE:
- ROLLER
- SIZE:
- STANDARD
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- SET
$39.95 -
EASTERN MOTORCYCLE PARTS Sprocket Shaft Spacer A-24039-03
EASTERN MOTORCYCLE PARTS
$30.95Precision sprocket alignment is critical to drivetrain efficiency and chain longevity. This Eastern Motorcycle Parts spacer ensures proper shaft positioning, eliminating binding and premature wear on your sprocket assembly. Install with confidence...09500361- SKU:
- 09500361
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- TYPE:
- SPROCKET
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- SHAFT SPACER
$30.95 -
EASTERN MOTORCYCLE PARTS Strainer with Gasket Kit A-24975-KIT
EASTERN MOTORCYCLE PARTS
$14.95A clean oil system is non-negotiable for engine longevity and performance. This strainer kit removes contaminants before they circulate through your engine's critical passages, protecting bearings and extending oil change intervals. When you're running...09500362- SKU:
- 09500362
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- STRAINER KIT
- UNITS:
- KIT
$14.95 -
Jims Oil Pump Shaft 1936-1967 Big Twin 26346-36
JIMS
$49.80An oil pump shaft is the critical rotating component that circulates oil throughout your Big Twin engine—without a properly functioning shaft, you're risking inadequate lubrication, accelerated wear, and potential catastrophic engine failure. The JIMS...DS197037- SKU:
- DS197037
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- DRIVE SHAFT
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- EACH
$49.80 -
Jims Oil Pump Shaft for Harley-Davidson Big Twin 1970-1984 26346-69/70
JIMS
$43.05A failing oil pump shaft compromises lubrication throughout your Big Twin engine, risking bearing wear, increased friction, and catastrophic failure during rides. The JIMS Oil Pump Shaft restores consistent oil delivery to critical engine components,...DS197038- SKU:
- DS197038
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- DRIVE SHAFT
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- EACH
$43.05 -
Jims Cam Cover Bushing for Harley-Davidson XL1200C 1996-2006 25586-37
JIMS
$42.35Worn cam cover bushings compromise engine sealing and can lead to oil leakage and accelerated wear on critical engine components. The JIMS Cam Cover Bushing restores proper tolerance and fit, ensuring reliable performance and longevity for your...DS197070- SKU:
- DS197070
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- SIZE IMPERIAL:
- 0.9405'
- TYPE:
- CAM COVER
- UNITS:
- EACH
- MATERIAL:
- BRONZE
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
$42.35 -
Jims Flow Pro 1 Billet Oil Pump 1991 FXDB-S 1754
JIMS
$808.65Your 1991 FXDB-S demands reliable, consistent oil delivery to keep the engine running strong under load. The JIMS Flow Pro 1 Billet Oil Pump replaces restrictive stock components with CNC-machined precision gearing that increases flow rate and return...DS197094- SKU:
- DS197094
- Availability:
- Ships Same Business Day
- Weight:
- 2.94 LBS
- UNITS:
- KIT
- MODEL:
- FLOW PRO 1
- TYPE:
- OIL PUMP
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- 6061 BILLET ALUMINUM
- PRODUCT NAME:
- PUMP ASSEMBLY
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$808.65Qty in Cart: 0Quantity:Price:$808.65Subtotal:
