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
-
On Sale
COMETIC Cylinder Base Gasket C9603-2
COMETIC
MSRP: $6.95Now: $6.26Was: $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...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'
MSRP: $6.95Now: $6.26Was: $6.95 -
On Sale
COMETIC Pushrod Cover Seals C9606
COMETIC
Now: $5.76Was: $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...09344716- SKU:
- 09344716
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PUSHROD COVER
- UNITS:
- 25 PACK
- PRODUCT NAME:
- GASKET
Now: $5.76Was: $6.40Qty in Cart: 0Quantity:Price:Now: $5.76Was: $6.40Subtotal: -
On Sale
COMETIC Cylinder Base Gasket C9618
COMETIC
MSRP: $11.95Now: $10.76Was: $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...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
MSRP: $11.95Now: $10.76Was: $11.95 -
On Sale
COMETIC Head Gasket C9698-2
COMETIC
MSRP: $34.60Now: $31.14Was: $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...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'
MSRP: $34.60Now: $31.14Was: $34.60Qty in Cart: 0Quantity:Price:MSRP: $34.60Now: $31.14Was: $34.60Subtotal: -
On Sale
COMETIC Cam Service Gasket Kit C9624F
COMETIC
MSRP: $26.20Now: $23.58Was: $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...09341358- SKU:
- 09341358
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- CAM CHANGE
- PRODUCT NAME:
- GASKET KIT
MSRP: $26.20Now: $23.58Was: $26.20 -
On Sale
COMETIC Oil Pump Paper Gasket C9383
COMETIC
Now: $6.66Was: $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...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
Now: $6.66Was: $7.40Qty in Cart: 0Quantity:Price:Now: $6.66Was: $7.40Subtotal: -
On Sale
COMETIC Oil Pump Paper Gasket C9381
COMETIC
Now: $6.66Was: $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...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
Now: $6.66Was: $7.40 -
On Sale
COMETIC Oil Pump Paper Gasket C9384
COMETIC
Now: $6.66Was: $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...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'
Now: $6.66Was: $7.40 -
On Sale
COMETIC Inspection Cover Gasket - XL C9326F5
COMETIC
Now: $14.76Was: $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...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
Now: $14.76Was: $16.40Qty in Cart: 0Quantity:Price:Now: $14.76Was: $16.40Subtotal: -
On Sale
COMETIC Head Gasket - 3.937" x .030" C10083-030
COMETIC
MSRP: $59.80Now: $53.82Was: $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...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
MSRP: $59.80Now: $53.82Was: $59.80 -
On Sale
COMETIC Derby Cover Gasket - 5 Hole C9152F1
COMETIC
MSRP: $10.95Now: $9.86Was: $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...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
MSRP: $10.95Now: $9.86Was: $10.95 -
On Sale
COMETIC Drain Plug O-Ring C9435
COMETIC
MSRP: $6.25Now: $5.63Was: $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...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
MSRP: $6.25Now: $5.63Was: $6.25Qty in Cart: 0Quantity:Price:MSRP: $6.25Now: $5.63Was: $6.25Subtotal: -
On Sale
COMETIC Primary Gasket Kit C9888
COMETIC
MSRP: $130.15Now: $117.14Was: $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...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
MSRP: $130.15Now: $117.14Was: $130.15 -
On Sale
COMETIC Top End Gasket - Twin Cam C9146
COMETIC
MSRP: $150.10Now: $135.09Was: $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...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
MSRP: $150.10Now: $135.09Was: $150.10 -
On Sale
COMETIC Shifter Shaft Seal C9259
COMETIC
Now: $8.55Was: $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...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
Now: $8.55Was: $9.50Qty in Cart: 0Quantity:Price:Now: $8.55Was: $9.50Subtotal: -
On Sale
COMETIC Trans Main Shaft Seal C9215
COMETIC
MSRP: $14.65Now: $13.19Was: $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...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
MSRP: $14.65Now: $13.19Was: $14.65Qty in Cart: 0Quantity:Price:MSRP: $14.65Now: $13.19Was: $14.65Subtotal: -
On Sale
ANDREWS V2 Grind Cams - Evolution - XL 298120
ANDREWS
MSRP: $504.95Now: $454.46Was: $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...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
MSRP: $504.95Now: $454.46Was: $504.95Qty in Cart: 0Quantity:Price:MSRP: $504.95Now: $454.46Was: $504.95Subtotal: -
On Sale
ANDREWS Cams - M460 - M8 217460
ANDREWS
MSRP: $268.95Now: $242.06Was: $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"...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
MSRP: $268.95Now: $242.06Was: $268.95 -
On Sale
ANDREWS Cams - PB+ - XL 214040
ANDREWS
MSRP: $652.95Now: $587.66Was: $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...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
MSRP: $652.95Now: $587.66Was: $652.95Qty in Cart: 0Quantity:Price:MSRP: $652.95Now: $587.66Was: $652.95Subtotal: -
On Sale
ANDREWS Cams - PB+ - XL 214055
ANDREWS
MSRP: $609.95Now: $548.96Was: $609.95If you're looking to unlock genuine power gains without tearing into your cylinder head, the ANDREWS Cams PB+ XL 214055 delivers measurable increases in horsepower and torque through a...09250593- SKU:
- 09250593
- Availability:
- Ships Same Business Day
- Weight:
- 3.90 LBS
- EXHAUST LIFT IMPERIAL:
- 0.410'
- GRIND:
- PB+
- INTAKE DURATION IMPERIAL:
- 254°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.208'
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
- UNITS:
- SET
- APPLICATION:
- EXHAUST
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.208'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 96°
- EXHAUST OPEN IMPERIAL:
- 43°
- INTAKE LOBE CENTERLINE IMPERIAL:
- 93°
- EXHAUST DURATION IMPERIAL:
- 254°
- INTAKE CLOSE IMPERIAL:
- 40°
- INTAKE LIFT IMPERIAL:
- 0.400'
- INTAKE OPEN IMPERIAL:
- 34°
- APPLICATION:
- INTAKE
- EXHAUST CLOSE IMPERIAL:
- 31°
MSRP: $609.95Now: $548.96Was: $609.95Qty in Cart: 0Quantity:Price:MSRP: $609.95Now: $548.96Was: $609.95Subtotal:
