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 Head Gasket C9566-2
COMETIC
$23.05A head gasket is your engine's critical seal against combustion pressure, coolant leakage, and oil seepage. The COMETIC C9566-2 uses multi-layer steel construction with load-control embossments to maintain consistent clamping force across the sealing...09344710- SKU:
- 09344710
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,043'
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.09 MM
- THICKNESS:
- 1,09 MM (0,043')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$23.05 -
COMETIC Cylinder Base Gasket C9603-2
COMETIC
$6.95A properly sealed cylinder base is critical to maintaining compression and preventing oil leakage on your Sportster. The COMETIC Cylinder Base Gasket C9603-2 is engineered to withstand the thermal cycling and pressure demands of high-performance riding,...09344715- SKU:
- 09344715
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,79 MM (0,031')
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- MATERIAL:
- FIBER
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- STANDARD
- THICKNESS IMPERIAL:
- 0,031'
$6.95 -
COMETIC Pushrod Cover Seals C9606
COMETIC
$6.40Pushrod cover leaks are a silent killer of engine cleanliness and long-term reliability. The COMETIC C9606 Pushrod Cover Seals kit contains OEM-equivalent seals and O-rings engineered to eliminate seepage at critical engine junctions. Whether you're...09344716- SKU:
- 09344716
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PUSHROD COVER
- UNITS:
- 25 PACK
- PRODUCT NAME:
- GASKET
$6.40Qty in Cart: 0Quantity:Price:$6.40Subtotal: -
COMETIC Cylinder Base Gasket C9618
COMETIC
$11.95A compromised cylinder base gasket will rob your Sportster of compression and invite oil seepage into your cases—two problems that compound quickly into expensive downtime. The COMETIC C9618 cylinder base gasket delivers the seal integrity you need to...09344718- SKU:
- 09344718
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- PRODUCT NAME:
- GASKET
- MATERIAL:
- FIBER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
$11.95 -
COMETIC Head Gasket C9698-2
COMETIC
$34.60A reliable head gasket is critical to maintaining combustion chamber integrity, oil containment, and coolant sealing under extreme pressure and temperature cycles. The COMETIC C9698-2 delivers precision MLS construction that distributes clamping load...09344719- SKU:
- 09344719
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS METRIC:
- 0.51 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
$34.60Qty in Cart: 0Quantity:Price:$34.60Subtotal: -
COMETIC Cam Service Gasket Kit C9624F
COMETIC
$26.20A cam change demands precision—and that starts with the right gasket kit. The COMETIC C9624F eliminates guesswork by bundling every seal, gasket, and O-ring you need for a complete, leak-free cam service. Skip the hassle of sourcing components...09341358- SKU:
- 09341358
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- CAM CHANGE
- PRODUCT NAME:
- GASKET KIT
$26.20 -
COMETIC Oil Pump Paper Gasket C9383
COMETIC
$7.40A failing oil pump gasket compromises engine lubrication and can lead to catastrophic bearing wear or complete engine failure. The COMETIC Oil Pump Paper Gasket C9383 provides a reliable OEM-quality seal that prevents oil leakage at the pump housing,...09341361- SKU:
- 09341361
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- THICKNESS METRIC:
- 0.25 MM
- MATERIAL:
- VULCANIZED FIBER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
$7.40Qty in Cart: 0Quantity:Price:$7.40Subtotal: -
COMETIC Oil Pump Paper Gasket C9381
COMETIC
$7.40A failing oil pump gasket compromises engine lubrication and invites catastrophic bearing damage—this is non-negotiable for any serious build. The COMETIC C9381 delivers OEM-equivalent sealing reliability with paper gasket construction that handles peak...09341362- SKU:
- 09341362
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- MATERIAL:
- VULCANIZED FIBER
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$7.40 -
COMETIC Oil Pump Paper Gasket C9384
COMETIC
$7.40An oil pump gasket is a critical sealing component that prevents oil leakage at the pump housing, maintaining proper lubrication pressure throughout your engine. Cometic's paper gasket construction provides reliable sealing performance while resisting...09341364- SKU:
- 09341364
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.25 MM
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
$7.40Qty in Cart: 0Quantity:Price:$7.40Subtotal: -
COMETIC Inspection Cover Gasket - XL C9326F5
COMETIC
$16.40A leaking inspection cover gasket compromises engine sealing and invites contamination into your engine bay—exactly what you don't need during competition or track days. The COMETIC C9326F5 delivers OEM-quality sealing with the reliability that...09341365- SKU:
- 09341365
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- UNITS:
- 5 PACK
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- INSPECTION COVER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
$16.40Qty in Cart: 0Quantity:Price:$16.40Subtotal: -
COMETIC Head Gasket - 3.937" x .030" C10083-030
COMETIC
$59.80A head gasket is your engine's critical seal—compromising on quality means risking blown gaskets, coolant leaks, and catastrophic engine damage. The COMETIC C10083-030 uses multi-layer steel construction with load control embossments to maintain even...09343145- SKU:
- 09343145
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE IMPERIAL:
- 3.937'
- THICKNESS:
- 0,76 MM (0,030')
- MATERIAL:
- VITON
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE:
- 3,937'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$59.80 -
COMETIC Derby Cover Gasket - 5 Hole C9152F1
COMETIC
$10.95A compromised derby cover gasket leads to oil seepage, cosmetic damage, and potential internal contamination on your Harley. The Cometic C9152F1 delivers a precision-engineered seal that eliminates weeping and keeps your engine compartment clean. This is...09341240- SKU:
- 09341240
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- MATERIAL:
- SILICONE
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- DERBY COVER
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
COMETIC Drain Plug O-Ring C9435
COMETIC
$6.25A worn or damaged drain plug O-ring is one of the easiest ways to develop an oil leak, compromising your engine's protection and creating costly messes in your garage or trailer. The COMETIC C9435 is a precision-engineered replacement that restores a...09350186- SKU:
- 09350186
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- NITRILE RUBBER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- APPLICATION:
- DRAIN PLUG
- PRODUCT NAME:
- O-RING
$6.25 -
COMETIC Primary Gasket Kit C9888
COMETIC
$130.15If you're rebuilding a primary clutch system, gasket failure isn't an option—it compromises sealing integrity and defeats the purpose of precision machine work. The COMETIC Primary Gasket Kit C9888 uses proprietary AFM (Aluminum Foamette Material)...09340745- SKU:
- 09340745
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
- UNITS:
- KIT
$130.15 -
COMETIC Top End Gasket - Twin Cam C9146
COMETIC
$150.10Gasket failure is one of the most common causes of top-end leaks and performance loss in Twin Cam engines. The COMETIC C9146 gasket kit eliminates guesswork by providing every seal and gasket you need for a complete, reliable top-end rebuild—eliminating...09341206- SKU:
- 09341206
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- DISPLACEMENT:
- 96'
- MATERIAL:
- RUBBER
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- STAINLESS STEEL
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,750'
- DISPLACEMENT:
- 88'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$150.10 -
COMETIC Shifter Shaft Seal C9259
COMETIC
$9.50Transmission fluid leaks at the shifter shaft are often overlooked until they become costly problems. The COMETIC Shifter Shaft Seal C9259 eliminates this vulnerability with a precision-engineered seal that maintains consistent hydraulic pressure and...09350201- SKU:
- 09350201
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- SHIFTER SHAFT
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
$9.50 -
COMETIC Trans Main Shaft Seal C9215
COMETIC
$14.65A compromised transmission main shaft seal is an invitation for costly fluid leaks and internal transmission damage. The COMETIC Trans Main Shaft Seal C9215 eliminates that risk with a precision-engineered seal designed to contain pressure and maintain...09350375- SKU:
- 09350375
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
$14.65 -
ANDREWS V2 Grind Cams - Evolution - XL 298120
ANDREWS
$504.95If you're running a stock hydraulic lifter setup and want to unlock genuine performance gains without a complete valve train overhaul, the Andrews V2 Grind Cams deliver measurable improvements in mid-range torque and top-end power. These bolt-in cams are...DS199295- SKU:
- DS199295
- Availability:
- Ships Same Business Day
- Weight:
- 4.20 LBS
- EXHAUST LIFT IMPERIAL:
- 0.440'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 104°
- APPLICATION:
- EXHAUST
- INTAKE OPEN IMPERIAL:
- 22°
- APPLICATION:
- INTAKE
- EXHAUST CLOSE IMPERIAL:
- 18°
- EXHAUST OPEN IMPERIAL:
- 46°
- INTAKE CLOSE IMPERIAL:
- 38°
- INTAKE DURATION IMPERIAL:
- 240°
- INTAKE LOBE CENTERLINE IMPERIAL:
- 98°
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
- TYPE:
- GEAR
- EXHAUST DURATION IMPERIAL:
- 244°
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.155'
- GRIND:
- V2
- INTAKE LIFT AT TDC IMPERIAL:
- 0.180'
- INTAKE LIFT IMPERIAL:
- 0.465'
- UNITS:
- 4 PACK
$504.95Qty in Cart: 0Quantity:Price:$504.95Subtotal: -
ANDREWS Cams - M460 - M8 217460
ANDREWS
$268.95The Andrews M460 cam delivers the low-to-mid RPM power that touring riders demand without sacrificing reliability on stock or mildly modified M8 engines. Whether you're running a 107" or 114" powerplant, this bolt-in cam transforms engine response in the...09251166- SKU:
- 09251166
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- APPLICATION:
- INTAKE
- EXHAUST LIFT IMPERIAL:
- 0.460'
- APPLICATION:
- EXHAUST
- INTAKE LIFT IMPERIAL:
- 0.080'
- UNITS:
- EACH
- PRODUCT NAME:
- CAM
- RIDING STYLE:
- STREET
- TYPE:
- CHAIN
$268.95 -
ANDREWS Cams - PB+ - XL 214040
ANDREWS
$652.95If you're running your engine close to the limit, stock cams become a bottleneck—restricting airflow when your engine is primed for more. The ANDREWS Cams PB+ XL 214040 unlocks additional horsepower and torque without requiring expensive cylinder head...09250590- SKU:
- 09250590
- Availability:
- Ships Same Business Day
- Weight:
- 4.75 LBS
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.208'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 96°
- INTAKE LOBE CENTERLINE IMPERIAL:
- 93°
- EXHAUST OPEN IMPERIAL:
- 43°
- INTAKE DURATION IMPERIAL:
- 254°
- UNITS:
- SET
- EXHAUST CLOSE IMPERIAL:
- 31°
- EXHAUST DURATION IMPERIAL:
- 254°
- GRIND:
- PB+
- INTAKE CLOSE IMPERIAL:
- 40°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.208'
- INTAKE LIFT IMPERIAL:
- 0.400'
- INTAKE OPEN IMPERIAL:
- 34°
- EXHAUST LIFT IMPERIAL:
- 0.410'
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
$652.95
