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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GARDNER-WESTCOTT Motor P-80-87
GARDNER-WESTCOTT
$309.95A complete motor cover set is essential for protecting your engine's critical components from debris, heat damage, and premature wear. The GARDNER-WESTCOTT P-80-87 delivers OEM-quality fitment and durability with U.S. manufacturing standards, allowing...DS189019- SKU:
- DS189019
- Availability:
- Ships Same Business Day
- Weight:
- 2.71 LBS
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BOLT KIT
- RIDING STYLE:
- STREET
- TYPE:
- MOTOR SET
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- UNITS:
- KIT
- BASE COLOR:
- SILVER
- MEASUREMENT SYSTEM:
- SAE
- STYLE:
- SOCKET-HEAD
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- POLISHED
$309.95Qty in Cart: 0Quantity:Price:$309.95Subtotal: -
GARDNER-WESTCOTT Stainless Steel Motor SP-80-87
GARDNER-WESTCOTT
$271.95If you're rebuilding or customizing a Harley-Davidson engine, Gardner-Westcott's stainless steel motor covers deliver the durability and corrosion resistance your drivetrain demands. These U.S.-manufactured components protect critical engine areas from...DS189018- SKU:
- DS189018
- Availability:
- Ships Same Business Day
- Weight:
- 2.69 LBS
- BASE FINISH:
- NATURAL
- BASE FINISH:
- POLISHED
- PRODUCT NAME:
- BOLT KIT
- RIDING STYLE:
- STREET
- TYPE:
- MOTOR SET
- UNITS:
- KIT
- BASE COLOR:
- SILVER
- MEASUREMENT SYSTEM:
- SAE
- STYLE:
- SOCKET-HEAD
- COLOR/FINISH:
- SILVER
- COLOR/FINISH:
- NATURAL
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- STAINLESS STEEL
$271.95Qty in Cart: 0Quantity:Price:$271.95Subtotal: -
GARDNER-WESTCOTT Motor P-80-88
GARDNER-WESTCOTT
$312.95The GARDNER-WESTCOTT Motor P-80-88 delivers a complete, factory-quality cover and mounting solution for builders and rebuilds who demand precision fit and durability. Whether you're assembling a stroker motor or refreshing an engine with OEM-grade...DS189015- SKU:
- DS189015
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- POLISHED
- BASE COLOR:
- SILVER
- MEASUREMENT SYSTEM:
- SAE
- STYLE:
- SOCKET-HEAD
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- UNITS:
- KIT
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BOLT KIT
- RIDING STYLE:
- STREET
- TYPE:
- MOTOR SET
$312.95 -
JAMES GASKET Complete Motor Gasket Kit - XL 17026-73
JAMES GASKET
$125.95A complete engine gasket kit eliminates the guesswork and potential for incomplete rebuilds by providing all top-quality gaskets, oil seals, and o-rings in one package. Rather than sourcing individual components from multiple suppliers, you get...DS181179- SKU:
- DS181179
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$125.95 -
JAMES GASKET Complete Motor Gasket Kit - XL 17026-86
JAMES GASKET
$167.95A complete engine rebuild demands gaskets and seals that won't compromise your work. This JAMES GASKET kit eliminates the frustration of sourcing individual components—everything you need for a full motor teardown and reassembly is here. U.S...DS181178- SKU:
- DS181178
- Availability:
- Ships Same Business Day
- Weight:
- 1.94 LBS
- TYPE:
- COMPLETE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$167.95 -
GARDNER-WESTCOTT Cam Cover Bolts - Twin Cam P-10-18-06
GARDNER-WESTCOTT
$35.95Harley cam cover bolts endure constant thermal cycling and vibration—factory fasteners often loosen or corrode, leading to oil leaks and engine damage. GARDNER-WESTCOTT cam cover bolts deliver the strength and reliability you need to keep your motor...DS175006- SKU:
- DS175006
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BASE COLOR:
- SILVER
- COLOR/FINISH:
- POLISHED
- TYPE:
- CAM COVER
- BASE FINISH:
- POLISHED
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- MEASUREMENT SYSTEM:
- SAE
- RIDING STYLE:
- STREET
- STYLE:
- SOCKET-HEAD
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- PRODUCT NAME:
- BOLT KIT
$35.95 -
JAMES GASKET Seal & Ferrule Oil Line Feed Tube 63528-92
JAMES GASKET
$19.80Proper oil delivery is non-negotiable in high-performance applications where engine stress demands consistent lubrication. The JAMES GASKET Seal & Ferrule Oil Line Feed Tube ensures reliable, leak-free oil flow to critical engine components without...DS174992- SKU:
- DS174992
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- 5 PACK
- APPLICATION:
- OIL LINE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
$19.80 -
JAMES GASKET Induction Module Gasket Kit - FL 27202-95-K
JAMES GASKET
$24.95Fuel system reliability starts with quality gaskets and seals—a single failed O-ring can compromise your entire induction system and cost you race day. The JAMES GASKET Induction Module Gasket Kit eliminates guesswork by providing precision-engineered...DS174988- SKU:
- DS174988
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- FUEL INJECTOR
- UNITS:
- KIT
$24.95 -
JAMES GASKET Check Valve O-Ring 11246
JAMES GASKET
$5.00A leaking check valve can compromise your entire PCV system's efficiency and create unwanted pressure inconsistencies in your engine. The JAMES GASKET Check Valve O-Ring (JGI-11246) is a precision replacement that restores proper sealing and prevents...DS174985- SKU:
- DS174985
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- 10 PACK
- APPLICATION:
- CHECK VALVE
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- TYPE:
- OIL
$5.00 -
JAMES GASKET Big Bore Base Steel - Big Twin 16777-66-X
JAMES GASKET
$44.95A proper base gasket is foundational to engine reliability—it seals critical surfaces and prevents oil leakage that can compromise performance and longevity. The JAMES GASKET Big Bore Base Steel delivers the precision fit and material quality that Big...DS174983- SKU:
- DS174983
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- BORE SIZE IMPERIAL:
- 3.625'
- FEATURES:
- BEADED
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CYLINDER BASE
- THICKNESS IMPERIAL:
- 0,032'
- RIDING STYLE:
- STREET
- UNITS:
- SET
$44.95 -
JAMES GASKET Big Bore Top End Gasket Kit - 3-5/8" 17034-78-S
JAMES GASKET
$88.95A complete engine rebuild demands precision-matched gaskets, seals, and O-rings that maintain compression and prevent oil leakage under sustained load. The JAMES GASKET Big Bore Top End Gasket Kit delivers the OEM-equivalent quality you need when...DS174982- SKU:
- DS174982
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$88.95 -
JAMES GASKET Metal Base Gasket - 3-5/8" - Big Twin 16777-66-SX
JAMES GASKET
$44.95A properly sealed engine base is fundamental to preventing oil leaks and maintaining consistent crankcase pressure in Big Twin applications. The JAMES GASKET Metal Base Gasket eliminates the guesswork of gasket sealer compatibility and application by...DS174980- SKU:
- DS174980
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- FEATURES:
- BEADED
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
$44.95 -
JAMES GASKET Top End Gasket Kit - E EL 17034-38
JAMES GASKET
$59.95A complete engine rebuild demands precision-engineered gaskets and seals that maintain compression and prevent oil leakage under sustained load. JAMES GASKET's top-end kit eliminates the guesswork by supplying OEM-quality gaskets, oil seals, and O-rings...DS174975- SKU:
- DS174975
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- KIT
$59.95 -
JAMES GASKET Top End Gasket Kit - FL/FLH 17034-66-X
JAMES GASKET
$113.95A complete top-end gasket rebuild demands precision-fit seals that won't compromise under sustained RPM. JAMES GASKET delivers OEM-grade gaskets, oil seals, and O-rings engineered to eliminate leaks and maintain compression integrity across the entire...DS174973- SKU:
- DS174973
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- KIT
$113.95 -
JAMES GASKET Top End Gasket Kit - 3-5/8" - EVO/Big Twin 17033-83-S
JAMES GASKET
$107.95A top-end gasket failure can sideline your engine and derail your season. This JAMES GASKET kit delivers all the sealing components you need for a complete, reliable rebuild—gaskets, oil seals, and O-rings engineered to factory specifications and made...DS174972- SKU:
- DS174972
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.625'
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- TOP END
- UNITS:
- KIT
$107.95 -
JAMES GASKET Complete Gasket Set - E-EL 17028-36
JAMES GASKET
$90.95A complete engine rebuild demands precision sealing at every junction—compromised gaskets lead to oil leaks, compression loss, and costly downtime. The JAMES GASKET Complete Gasket Set delivers all necessary sealing components for a full Panhead engine...DS174965- SKU:
- DS174965
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$90.95 -
JAMES GASKET Primary Gasket - .62" 34952-52-A
JAMES GASKET
$65.80A properly sealed primary case is non-negotiable for reliable engine performance and oil containment. The JAMES GASKET Primary Gasket delivers OEM-equivalent or superior sealing with silicone beading technology, ensuring your engine stays dry under...DS174963- SKU:
- DS174963
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- STYLE:
- PRIMARY
- THICKNESS METRIC:
- 1.60 MM
- RIDING STYLE:
- STREET
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.062'
- TYPE:
- COVER
- UNITS:
- 10 PACK
$65.80 -
JAMES GASKET Primary Cover Gasket - .030" 34955-67-A
JAMES GASKET
$49.50A failing primary cover gasket compromises engine sealing and invites oil leakage into your cases—exactly what you don't need mid-race or mid-ride. The JAMES GASKET Primary Cover Gasket delivers OEM-equivalent sealing performance with silicone beading...DS174962- SKU:
- DS174962
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- COVER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.80 MM
- STYLE:
- PRIMARY
$49.50 -
JAMES GASKET Primary Gasket - .030" 34955-75-X
JAMES GASKET
$66.90A properly sealed primary case is non-negotiable for engine reliability and oil retention. The JAMES GASKET Primary Gasket delivers OEM-equivalent or superior sealing performance with factory-grade silicone beading, eliminating leaks that can compromise...DS174961- SKU:
- DS174961
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- SILICONE
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
$66.90 -
JAMES GASKET Primary Gasket - .30" 34955-89-X
JAMES GASKET
$66.20A primary gasket failure doesn't just leak—it compromises your entire engine sealing system and can lead to costly internal damage. The JAMES GASKET Primary Gasket delivers OEM-equivalent performance with silicone beading for superior sealing integrity,...DS174960- SKU:
- DS174960
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FEATURES:
- BEADED
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- UNITS:
- 5 PACK
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$66.20
