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 Big Bore Kit - Big Twin 16770-84S
JAMES GASKET
$52.95A proper gasket seal is non-negotiable for big-bore performance—inadequate sealing leads to compression loss, oil leakage, and potential engine damage. The JAMES GASKET Big Bore Kit delivers the precision fit and material quality your engine demands,...DS174903- SKU:
- DS174903
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- STYLE:
- BIG BORE
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
- MATERIAL:
- TEFLON
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
- PRODUCT NAME:
- GASKET
$52.95 -
JAMES GASKET Rocker Box Rubber Gasket - XL 17030-89
JAMES GASKET
$68.95A deteriorating rocker box gasket is one of the most common culprits behind oil seepage and compromised valve train performance. The JAMES GASKET XL 17030-89 delivers a reliable, OE-quality seal that prevents costly oil loss and keeps your engine running...DS174902- SKU:
- DS174902
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- ROCKER BOX
- UNITS:
- KIT
$68.95 -
JAMES GASKET Teflon Head Gasket - XL 16769-57
JAMES GASKET
$43.20A compromised head gasket is one of the fastest ways to lose compression, leak coolant, and turn a reliable engine into a paperweight. The JAMES GASKET Teflon Head Gasket delivers the sealing integrity you need to maintain peak performance across...DS174900- SKU:
- DS174900
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- TEFLON
- THICKNESS:
- 1,14 MM (0,045')
- TYPE:
- CYLINDER HEAD
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
$43.20 -
JAMES GASKET Countershaft Cap Gasket 36025-36
JAMES GASKET
$11.30A worn or damaged countershaft cap gasket compromises your transmission's seal integrity, leading to oil leakage, contamination, and potential internal damage. The JAMES GASKET Countershaft Cap Gasket 36025-36 delivers a reliable OEM-quality replacement...DS174899- SKU:
- DS174899
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- STYLE:
- COVER
- TYPE:
- COUNTERSHAFT
- TYPE:
- TRANSMISSION
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$11.30 -
JAMES GASKET Trans Dust Cover Gasket 34565-52
JAMES GASKET
$9.50A transmission dust cover gasket is critical to preventing contaminants from entering your transmission housing while maintaining a reliable seal under thermal cycling and fluid exposure. The JAMES GASKET Trans Dust Cover Gasket uses advanced MicroPore...DS174897- SKU:
- DS174897
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- TYPE:
- SHIFTER ADAPTER PLATE
$9.50 -
JAMES GASKET Kicker Cover Gasket - 4 Speed 33295-36
JAMES GASKET
$10.60A quality kicker cover gasket is essential for maintaining a reliable, leak-free seal on your 4-speed transmission—critical when you're counting on consistent performance whether you're on the track or the street. JAMES GASKET's MicroPore technology...DS174895- SKU:
- DS174895
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- STYLE:
- 4-SPEED
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION END COVER
$10.60 -
JAMES GASKET New Switch Gasket - Big Twin 33043-80
JAMES GASKET
$5.00A properly sealed ignition switch cover is critical to keeping moisture and debris out of your Big Twin's electrical system. This JAMES GASKET replacement maintains OEM-spec sealing performance while delivering the durability your bike demands. Whether...DS174894- SKU:
- DS174894
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- UNITS:
- 10 PACK
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- TYPE:
- NETURAL SWITCH
$5.00 -
JAMES GASKET Speedo Drive Gasket - Big Twin 67141-36
JAMES GASKET
$7.70A leaking speedometer drive gasket compromises accuracy and creates messy oil seepage around your transmission area. The JAMES GASKET Speedo Drive Gasket delivers a precision OEM-equivalent seal that restores reliable speedometer function and eliminates...DS174893- SKU:
- DS174893
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- TYPE:
- SPEEDOMETER DRIVE
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$7.70 -
JAMES GASKET Trans Top Cover Gasket - Big Twin 34824-36
JAMES GASKET
$15.60A leaking transmission top cover gasket compromises both engine cleanliness and performance, allowing vital fluids to escape and inviting contamination into your drivetrain. The JAMES GASKET Trans Top Cover Gasket restores a reliable seal on Big Twin...DS174890- SKU:
- DS174890
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION TOP COVER
$15.60 -
JAMES GASKET Trans Top Cover Gasket - FXD 34917-90
JAMES GASKET
$25.50A leaking transmission top cover gasket compromises your bike's reliability and creates a mess in your engine bay. The JAMES GASKET Trans Top Cover Gasket is precision-engineered to seal your FXD transmission housing and eliminate weeping, keeping oil...DS174878- SKU:
- DS174878
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
$25.50 -
JAMES GASKET Upper Pushrod Quad Seal 11118
JAMES GASKET
$12.40Proper pushrod sealing is critical to maintaining oil pressure and preventing leakage in high-performance engines where every drop counts. The JAMES GASKET Upper Pushrod Quad Seal delivers precision-engineered sealing across all four contact points,...DS174832- SKU:
- DS174832
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 25 PACK
- PRODUCT NAME:
- X-RING
- APPLICATION:
- PUSHROD COVER
- TYPE:
- QUAD SEAL
$12.40 -
JAMES GASKET Trans Top Cover Gasket - Big Twin 34824-79
JAMES GASKET
$10.60A worn transmission top cover gasket is a common source of oil seepage on Big Twin engines, leading to messy leaks and potential internal contamination. The JAMES GASKET Trans Top Cover Gasket delivers a factory-quality seal that eliminates weeping and...DS174831- SKU:
- DS174831
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION TOP COVER
$10.60 -
JAMES GASKET Mid Pushrod O-Ring 11132
JAMES GASKET
$3.30Proper valve train sealing is critical to maintaining cylinder pressure and preventing oil leakage that compromises engine efficiency. The JAMES GASKET Mid Pushrod O-Ring is engineered to provide a reliable, long-lasting seal in high-heat pushrod...DS174830- SKU:
- DS174830
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
- APPLICATION:
- PUSHROD COVER
- MATERIAL:
- RUBBER
$3.30 -
JAMES GASKET Oil Pump Cover Gasket - Big Twin 26276-80-A
JAMES GASKET
$14.70Oil seepage at the pump cover is a common failure point that compounds into costly engine damage if left unchecked. A worn or degraded gasket allows oil to bypass the seal, leading to pressure loss and potential bearing wear. JAMES GASKET's OEM-quality...DS174829- SKU:
- DS174829
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- STYLE:
- COVER
$14.70 -
JAMES GASKET Pushrod Lower O-Ring 11133
JAMES GASKET
$7.70A failing pushrod seal can lead to oil leakage, compromised valve train performance, and expensive engine damage down the line. The JAMES GASKET Pushrod Lower O-Ring ensures a reliable, leak-free seal at the pushrod base, maintaining proper oil pressure...DS174828- SKU:
- DS174828
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- APPLICATION:
- TAPPET GUIDE
- UNITS:
- 25 PACK
- PRODUCT NAME:
- O-RING
- APPLICATION:
- PUSHROD COVER
$7.70 -
JAMES GASKET Shift Cover Gasket - Big Twin 33196-79
JAMES GASKET
$7.90A leaking shift cover gasket compromises your engine's reliability and creates a messy workspace. The JAMES GASKET Shift Cover Gasket is engineered to seal consistently across thermal cycles, preventing oil seepage that can damage clutch components and...DS174827- SKU:
- DS174827
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- TYPE:
- SHIFTER COVER
- UNITS:
- 10 PACK
$7.90Qty in Cart: 0Quantity:Price:$7.90Subtotal: -
JAMES GASKET Oil Pump Gasket - Big Twin 26273-80-B
JAMES GASKET
$14.70Oil leaks compromise engine performance and create costly maintenance headaches—a quality gasket is your first line of defense against seepage and pressure loss. The JAMES GASKET Oil Pump Gasket is engineered to OEM specifications for Big Twin engines,...DS174826- SKU:
- DS174826
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- STYLE:
- BODY
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$14.70 -
JAMES GASKET Intake Manifold Seal 27062-78
JAMES GASKET
$32.80A properly sealed intake manifold is critical to maintaining consistent fuel mixture delivery and preventing vacuum leaks that rob your engine of power and efficiency. The JAMES GASKET Intake Manifold Seal Kit addresses common leak points where gaskets...DS174822- SKU:
- DS174822
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- APPLICATION:
- INTAKE MANIFOLD
- PRODUCT NAME:
- SEAL
$32.80 -
JAMES GASKET Oil Pump O-Ring - XL 26434-91
JAMES GASKET
$11.10A failing oil pump O-ring compromises your entire lubrication system, risking catastrophic engine damage and costly downtime. JAMES GASKET's XL 26434-91 provides a precision replacement that restores proper sealing and maintains consistent oil pressure...DS174821- SKU:
- DS174821
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- OIL PUMP
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$11.10Qty in Cart: 0Quantity:Price:$11.10Subtotal: -
On Sale
JAMES GASKET Oil Pump Cover O-Ring 26434-76-A
JAMES GASKET
Now: $7.00Was: $11.40An aging or degraded oil pump cover O-ring is a silent leak waiting to happen—one that can quietly drain your engine's lifeblood and compromise lubrication under load. The JAMES GASKET Oil Pump Cover O-Ring is precision-engineered to seal effectively...DS174820- SKU:
- DS174820
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- O-RING
- APPLICATION:
- OIL PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
Now: $7.00Was: $11.40
