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 Chain Housing Cover O-Ring 11125
JAMES GASKET
$23.30A worn or compromised chain housing cover o-ring will allow oil seepage and contamination, directly impacting chain lubrication and drivetrain longevity. The JAMES GASKET Chain Housing Cover O-Ring 11125 is a precision-engineered replacement that...DS174315- SKU:
- DS174315
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- CHAIN COVER
- TYPE:
- OIL
- APPLICATION:
- MOTOR
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$23.30 -
JAMES GASKET Side Starter Seal - Big Twin 12053
JAMES GASKET
$30.20A leaking starter seal compromises engine integrity and creates costly oil seepage that demands immediate attention. The JAMES GASKET Side Starter Seal delivers a precision-engineered replacement that restores a watertight seal on Big Twin engines,...DS174313- SKU:
- DS174313
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- STARTER SHAFT
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$30.20 -
JAMES GASKET Lower Pushrod O-Ring - XL 17944-89
JAMES GASKET
$16.80Proper valve train sealing is non-negotiable in high-performance engines, and a degraded pushrod O-ring can compromise oil pressure, increase blowby, and accelerate wear on critical components. The JAMES GASKET Lower Pushrod O-Ring ensures a reliable...DS174312- SKU:
- DS174312
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- O-RING
- APPLICATION:
- PUSHROD COVER
- MATERIAL:
- RUBBER
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$16.80 -
JAMES GASKET Primary Cover Gasket 60539-94
JAMES GASKET
$132.00A leaking primary cover gasket compromises both engine performance and aesthetics—leaving your engine vulnerable to oil seepage and potential damage. The JAMES GASKET Primary Cover Gasket 60539-94 delivers OEM-equivalent sealing performance with...DS174308- SKU:
- DS174308
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- MATERIAL:
- PAPER
- UNITS:
- 5 PACK
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- TYPE:
- COVER
$132.00 -
JAMES GASKET Big Bore Base Gasket - Big Twin 16777-94-S
JAMES GASKET
$44.95A proper base gasket is critical for maintaining cylinder seal integrity and preventing oil weepage on Big Twin engines. JAMES GASKET's Big Bore version delivers a precision fit without the mess of additional sealers, saving you setup time and ensuring a...DS174307- SKU:
- DS174307
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- FEATURES:
- BEADED
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- BORE SIZE IMPERIAL:
- 3.625'
- TYPE:
- CYLINDER BASE
$44.95 -
JAMES GASKET Inspection Cover Gasket 60567-65-B
JAMES GASKET
$31.50Inspection cover leaks compromise engine cleanliness and can lead to oil seepage that damages your engine bay and surrounding components. The JAMES GASKET Inspection Cover Gasket is a precision-molded seal engineered to eliminate leaks at your derby or...DS174305- SKU:
- DS174305
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,60 MM (0,062')
- THICKNESS METRIC:
- 1.60 MM
- TYPE:
- INSPECTION COVER
- UNITS:
- 5 PACK
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,062'
$31.50 -
JAMES GASKET Rocker Box Rubber Gasket - XL 17030-91
JAMES GASKET
$68.95A worn or degraded rocker box gasket is a common culprit behind oil leaks that compromise engine cleanliness and performance. The JAMES GASKET Rocker Box Rubber Gasket XL 17030-91 delivers a precision OEM-quality seal that restores proper containment and...DS174304- SKU:
- DS174304
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$68.95 -
JAMES GASKET Rocker Arm Shaft O-Ring 11101
JAMES GASKET
$5.40A failing rocker arm shaft o-ring compromises oil sealing and can lead to costly leaks that affect valve train performance and engine longevity. The JAMES GASKET Rocker Arm Shaft O-Ring 11101 is a precision-engineered replacement that restores proper...DS174290- SKU:
- DS174290
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- 25 PACK
- APPLICATION:
- ROCKER COVER
- PRODUCT NAME:
- O-RING
- APPLICATION:
- PUSHROD TUBE
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$5.40 -
JAMES GASKET Pushrod O-Ring - Big Twin 11157
JAMES GASKET
$20.10Pushrod o-rings are a critical seal in your Big Twin engine's valve train, and degradation leads to oil leakage and potential valve train damage. JAMES GASKET's precision-engineered o-ring maintains a reliable seal under high RPM loads and temperature...DS174289- SKU:
- DS174289
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- APPLICATION:
- PUSHROD COVER
- APPLICATION:
- ROCKER COVER
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 25 PACK
- PRODUCT NAME:
- O-RING
$20.10 -
JAMES GASKET Upper Pushrod O-Ring - XL 11190
JAMES GASKET
$38.60Upper pushrod o-rings are critical wear items that prevent oil leakage and maintain proper valve train sealing under high RPM operation. A compromised o-ring leads to oil loss, reduced engine efficiency, and potential internal damage—making regular...DS174287- SKU:
- DS174287
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 25 PACK
- APPLICATION:
- CYLINDER HEAD
- APPLICATION:
- PUSHROD COVER
$38.60 -
JAMES GASKET Clutch Inspection Cover O-Ring - XL 11187
JAMES GASKET
$18.30A worn or degraded clutch inspection cover o-ring compromises your engine's sealing integrity, risking oil leakage and potential contamination of critical drivetrain components. The JAMES GASKET XL 11187 is engineered to deliver a reliable, long-lasting...DS174286- SKU:
- DS174286
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- 25 PACK
- APPLICATION:
- CLUTCH INSPECTION COVER
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- O-RING
$18.30 -
JAMES GASKET Chrome Inspection Cover O-Ring - XL 11188
JAMES GASKET
$18.30Inspection cover leaks compromise engine cleanliness and create messy work bays. The JAMES GASKET Chrome Inspection Cover O-Ring delivers a reliable, factory-quality seal that eliminates weeping and maintains a tight fit across repeated service intervals...DS174285- SKU:
- DS174285
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- INSPECTION COVER
- TYPE:
- PRIMARY COVER
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
$18.30 -
JAMES GASKET Umbrella Valve Seal 26856-89
JAMES GASKET
$12.70Umbrella valve seals are critical to maintaining proper valve stem sealing and preventing oil blow-by in high-performance engines. A worn or degraded seal compromises compression, increases emissions, and can lead to costly engine damage. The JAMES...DS174284- SKU:
- DS174284
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- UNITS:
- 10 PACK
- APPLICATION:
- UMBRELLA VALVE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
$12.70 -
JAMES GASKET Float Bowl O-Ring 27577-92
JAMES GASKET
$19.00A failing float bowl O-ring is an easy source of fuel leaks and carburetor inconsistency that can derail your tuning efforts. This JAMES GASKET replacement delivers OEM-equivalent sealing without the downtime of sourcing factory parts. Get back to...DS174283- SKU:
- DS174283
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- UNITS:
- 5 PACK
- APPLICATION:
- CARBURETOR
- APPLICATION:
- FLOAT BOWL
$19.00 -
JAMES GASKET Tappet Guide O-Ring - XL 11100
JAMES GASKET
$6.30Tappet guide o-rings are critical wear items that prevent oil leakage and maintain proper valve train geometry in high-revving engines. Over time, these seals degrade from heat cycling and pressure, leading to oil weeping and potential valve train...DS174270- SKU:
- DS174270
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- TAPPET GUIDE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- TYPE:
- OIL
- UNITS:
- 25 PACK
$6.30 -
JAMES GASKET Point Cover Gasket 32591-70
JAMES GASKET
$7.10A failing point cover gasket compromises cam chest sealing, leading to oil leakage and potential engine damage on your Shovelhead. This JAMES GASKET replacement restores a reliable seal without requiring extensive machine work or component replacement...DS174240- SKU:
- DS174240
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- CIRCUIT BREAKER COVER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$7.10 -
JAMES GASKET Solenoid Mount Gasket 60645-65
JAMES GASKET
$9.70A leaking solenoid mount gasket can compromise your entire fuel system's integrity and create costly vacuum leaks that tank engine performance. The JAMES GASKET Solenoid Mount Gasket 60645-65 delivers a factory-spec seal that eliminates seepage at the...DS174230- SKU:
- DS174230
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- FEATURES:
- INCLUDES ADHESIVE
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- SOLENOID
- MOUNTING POSITION:
- INNER
- MATERIAL:
- FOAM
$9.70 -
JAMES GASKET Intake Manifold O-Ring 27060-55
JAMES GASKET
$6.40A failing intake manifold gasket can compromise your engine's air-fuel mixture and cause vacuum leaks that kill performance and fuel economy. The JAMES GASKET Intake Manifold O-Ring 27060-55 provides a precision seal that restores proper combustion...DS174220- SKU:
- DS174220
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- INTAKE MANIFOLD
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- O-RING
$6.40 -
JAMES GASKET Sprocket Shaft Seal - Big Twin 24776-40-X
JAMES GASKET
$32.95Engine oil leaks at the sprocket shaft are a common failure point on Big Twin motors, and a compromised seal can lead to costly damage and reduced reliability on the track or street. The JAMES GASKET Sprocket Shaft Seal is engineered to provide a tight,...DS174205- SKU:
- DS174205
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- APPLICATION:
- MOTOR SHAFT
$32.95 -
JAMES GASKET Motor Gasket Kit - Twin Cam - 95" 17055-99
JAMES GASKET
$130.95A complete engine rebuild demands precision gaskets, seals, and O-rings that maintain compression and prevent oil leakage under extreme operating conditions. The JAMES GASKET Motor Gasket Kit supplies all the essential sealing components you need for a...DS174204- SKU:
- DS174204
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 1.17 MM
- TYPE:
- COMPLETE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- THICKNESS IMPERIAL:
- 0,046'
- TYPE:
- MOTOR
$130.95
