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
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JAMES GASKET Gas Line Seal - FL/H 62360-50
JAMES GASKET
$18.90A compromised gas line seal can lead to fuel leaks, performance loss, and safety hazards that put your engine at risk. The JAMES GASKET Gas Line Seal FL/H 62360-50 delivers reliable, leak-free fuel delivery with OEM-grade construction built to withstand...DS173513- SKU:
- DS173513
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- GAS LINE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
$18.90 -
JAMES GASKET X-Large Rocker Shaft O-Ring 11101-X
JAMES GASKET
$11.30A worn or failing rocker shaft o-ring is one of the quickest ways to develop oil leaks that compromise engine sealing and performance. The JAMES GASKET X-Large Rocker Shaft O-Ring delivers OEM-equivalent sealing in a size designed for larger displacement...DS173508- SKU:
- DS173508
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- O-RING
- APPLICATION:
- ROCKER COVER
- SIZE:
- OVERSIZE
- APPLICATION:
- PUSHROD TUBE
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 25 PACK
$11.30 -
JAMES GASKET Cylinder Stud O-Ring - .62" 26432-76-X
JAMES GASKET
$15.70Cylinder head gaskets are only as reliable as their sealing components, and a compromised stud O-ring will cause oil weeping, compression loss, and potential head gasket failure. The JAMES GASKET Cylinder Stud O-Ring maintains a perfect seal under...DS173507- SKU:
- DS173507
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- THICKNESS IMPERIAL:
- 0.062'
- UNITS:
- 10 PACK
- APPLICATION:
- CYLINDER HEAD
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$15.70 -
JAMES GASKET Starter Oil Seal - Big Twin 12043-A
JAMES GASKET
$19.70A worn or leaking starter oil seal compromises engine integrity and can lead to costly oil seepage and potential starter failure on your Big Twin. The JAMES GASKET Starter Oil Seal delivers OEM-equivalent sealing performance with domestic manufacturing...DS173506- SKU:
- DS173506
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- 5 PACK
- APPLICATION:
- STARTER
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$19.70 -
JAMES GASKET Fuel Gauge O-Ring - Big Twin 61192-88
JAMES GASKET
$35.70A faulty fuel gauge o-ring leads to inaccurate readings and potential fuel system leaks—both costly problems on the track or street. This JAMES GASKET replacement ensures a reliable seal between your fuel tank sender and gauge, restoring accurate fuel...DS173505- SKU:
- DS173505
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- O-RING
- APPLICATION:
- FUEL CAP
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 10 PACK
$35.70 -
JAMES GASKET Derby Cover Quad Seal - Big Twin 25416-84-X
JAMES GASKET
$26.10A leaking derby cover isn't just messy—it compromises your engine's cleanliness and can lead to debris contamination in critical areas. The JAMES GASKET Derby Cover Quad Seal is a precision molded rubber seal with a metal insert that eliminates seepage...DS173501- SKU:
- DS173501
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- X-RING
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- APPLICATION:
- DERBY COVER
- TYPE:
- QUAD SEAL
$26.10 -
JAMES GASKET Rocker Box Cover Washer - Big Twin/XL 6114
JAMES GASKET
$6.20A worn or damaged rocker box cover washer can lead to oil seepage and potential engine damage on your Big Twin or XL. The JAMES GASKET 6114 is a precision-engineered replacement that ensures a proper seal and eliminates the need for makeshift fixes. Get...DS173500- SKU:
- DS173500
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- COPPER
- UNITS:
- 10 PACK
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- APPLICATION:
- ROCKER COVER
$6.20 -
JAMES GASKET Small Pushtube Cork 17955-36
JAMES GASKET
$58.90A properly sealed pushrod tube is critical to maintaining oil pressure and preventing leakage in high-performance engines. The JAMES GASKET Small Pushtube Cork delivers reliable sealing where your engine's internal passages meet external components,...DS173499- SKU:
- DS173499
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 100 PACK
- APPLICATION:
- PUSHROD COVER
- PRODUCT NAME:
- SEAL
$58.90 -
JAMES GASKET Copper Head Gasket - .045" - XL 16769-82
JAMES GASKET
$80.80A quality head gasket is the seal between your engine's block and cylinder head—get this wrong, and you're risking coolant loss, oil contamination, and catastrophic engine failure. The JAMES GASKET Copper Head Gasket delivers the compression sealing...DS173487- SKU:
- DS173487
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,14 MM (0,045')
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- COPPER
- UNITS:
- 10 PACK
- DISPLACEMENT:
- 1000 CC
- THICKNESS IMPERIAL:
- 0,045'
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.14 MM
$80.80 -
JAMES GASKET Fuel Fitting O-Ring - FL 27237-95
JAMES GASKET
$6.60Fuel system integrity depends on reliable sealing at every connection point, and this JAMES GASKET o-ring ensures a leak-free fit where it matters most. Designed to OEM specifications, it eliminates the risk of fuel weeping or pressure loss that can...DS173482- SKU:
- DS173482
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- O-RING
- APPLICATION:
- FUEL INJECTOR
- UNITS:
- 10 PACK
$6.60 -
JAMES GASKET Internal Seal - .062" - Blue Twin Cam 26995-97-X
JAMES GASKET
$29.00Internal gasket seals are critical to maintaining crankcase pressure and preventing oil leakage in high-performance engines—especially in forced induction applications where pressure spikes demand precision engineering. A failing internal seal...DS173479- SKU:
- DS173479
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- APPLICATION:
- INTAKE MANIFOLD
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$29.00 -
JAMES GASKET Primary Inspection Gasket with Seal - Big Twin 34906-79-A
JAMES GASKET
$25.40A quality primary inspection gasket is the first line of defense against oil seepage and contamination in your Big Twin engine. This James gasket delivers factory-grade reliability with precision molding that ensures a consistent seal across all cover...DS173478- SKU:
- DS173478
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- FEATURES:
- BEADED
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- UNITS:
- 5 PACK
- TYPE:
- INSPECTION COVER
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,60 MM (0,062')
$25.40 -
JAMES GASKET Primary Inspection Cover Gasket - 4 Speed 60567-65-C
JAMES GASKET
$14.10A leaking primary inspection cover can compromise your engine's oil integrity and leave you stranded on race day. The JAMES GASKET Primary Inspection Cover Gasket delivers a reliable, OEM-quality seal that eliminates weeping and maintains consistent...DS173477- SKU:
- DS173477
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- SILICONE
- UNITS:
- 10 PACK
- TYPE:
- INSPECTION COVER
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 1,60 MM (0,062')
$14.10 -
JAMES GASKET Inspection Cover Gasket 60567-90
JAMES GASKET
$16.50Inspection and derby cover seals take a beating from constant exposure to oil, heat, and vibration. A failed gasket means oil seepage, contamination, and potential engine damage—exactly what you don't need mid-season or mid-race. The JAMES GASKET...DS173476- SKU:
- DS173476
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,062'
- TYPE:
- INSPECTION COVER
- THICKNESS:
- 1,60 MM (0,062')
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- THICKNESS METRIC:
- 1.60 MM
- UNITS:
- 5 PACK
$16.50 -
JAMES GASKET Valve Spring Guide Gasket 18265-37
JAMES GASKET
$13.00Valve spring guide gaskets are critical sealing components that prevent oil leakage at the valve cover interface—a common failure point in high-performance engines. A compromised gasket will degrade engine bay cleanliness and risk oil loss during...DS173472- SKU:
- DS173472
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- VALVE GUIDE
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$13.00 -
JAMES GASKET Derby Nylon Washer 31433-84
JAMES GASKET
$7.30Derby covers demand precision sealing to prevent oil leakage and maintain engine integrity during high-RPM operation. This JAMES GASKET nylon washer provides the exact fitment and material consistency needed for reliable derby cover assembly, whether...DS173471- SKU:
- DS173471
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- UNITS:
- 20 PACK
- APPLICATION:
- DERBY COVER
- MATERIAL:
- NYLON
$7.30 -
JAMES GASKET Inspection Screw Gasket - FXST/FXD 63859-95
JAMES GASKET
$23.70Proper gasket sealing is critical to preventing oil weeping and contamination at inspection points on your Harley-Davidson. The JAMES GASKET Inspection Screw Gasket delivers OEM-equivalent reliability with precision engineering that eliminates the need...DS173469- SKU:
- DS173469
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- TYPE:
- CHAIN COVER
- UNITS:
- 32 PACK
$23.70 -
JAMES GASKET Large Pushrod Cork - Big Twin 17955-48
JAMES GASKET
$72.10A worn or degraded pushrod cork gasket compromises engine sealing and can lead to oil leakage around your Big Twin's pushrod tubes—a common failure point that affects both performance and longevity. The JAMES GASKET Large Pushrod Cork delivers OEM-grade...DS173468- SKU:
- DS173468
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 100 PACK
- PRODUCT NAME:
- SEAL
- APPLICATION:
- PUSHROD COVER
$72.10 -
JAMES GASKET Exhaust Port Gasket Steel Core 65834-68-SC
JAMES GASKET
$31.80A properly sealed exhaust port is the foundation of reliable engine performance and longevity. This James Gasket steel-core gasket prevents combustion leakage, heat loss, and exhaust bypass that can degrade power output and create costly secondary damage...DS173461- SKU:
- DS173461
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- FEATURES:
- FIRE RING
- TYPE:
- EXHAUST
- UNITS:
- 10 PACK
$31.80 -
JAMES GASKET F/I Sending Unit Gasket 61326-95
JAMES GASKET
$31.80A leaking fuel sending unit gasket can compromise your fuel system's integrity and trigger false gauge readings that leave you guessing about your actual fuel level. The JAMES GASKET F/I Sending Unit Gasket 61326-95 seals the connection reliably,...DS173458- SKU:
- DS173458
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- MATERIAL:
- CORK
- TYPE:
- FUEUL TANK CANOPY
$31.80
