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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COMETIC Copper Base Gasket - XL C9025
COMETIC
$17.80A quality head gasket is the foundation of reliable cylinder sealing—without it, you're risking compression loss, coolant leaks, and catastrophic engine failure. The COMETIC Copper Base Gasket delivers precision engineering with MLS (Multi-Layer Steel)...DS172050- SKU:
- DS172050
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- CYLINDER BASE
- MATERIAL:
- COPPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$17.80 -
COMETIC Left Rocker Box Gasket - Big Twin C9562
COMETIC
$20.10Rocker box gasket failures can lead to oil seepage, engine contamination, and costly downtime. The COMETIC Left Rocker Box Gasket (C9562) is engineered with a stainless steel core and precision Viton rubber coating to provide a reliable, long-lasting...DS172048- SKU:
- DS172048
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- ROCKER COVER
- UNITS:
- 5 PACK
- MATERIAL:
- VITON
- MOUNTING POSITION:
- LEFT
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS METRIC:
- 0.25 MM
$20.10 -
COMETIC Derby O-Ring C9442
COMETIC
$13.70Seal integrity is everything when you're pushing your engine to the limit. The COMETIC Derby O-Ring C9442 delivers the durability and chemical resistance your high-performance application demands, eliminating the risk of fuel degradation that can...DS172019- SKU:
- DS172019
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- NITRILE RUBBER
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- APPLICATION:
- DERBY COVER
$13.70 -
COMETIC Rocker Box Gasket Kit - Twin Cam C9588
COMETIC
$46.15When you're servicing your Twin Cam rocker boxes, using OEM gaskets leaves you vulnerable to repeat failures and costly downtime. The COMETIC Rocker Box Gasket Kit C9588 eliminates guesswork by providing every seal, gasket, and O-ring you need in a...DS172013- SKU:
- DS172013
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- TYPE:
- ROCKER BOX
- MODEL:
- EST
- UNITS:
- KIT
$46.15 -
COMETIC Right Lower Rocker Box Gasket C9560
COMETIC
$16.90Rocker box gasket failure leads to oil leakage, increased blowby, and potential engine damage—especially critical in high-performance applications where seal integrity directly impacts reliability. The COMETIC C9560 Right Lower Rocker Box Gasket uses a...DS172004- SKU:
- DS172004
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- ROCKER COVER
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- MOUNTING POSITION:
- LOWER
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS METRIC:
- 0.25 MM
$16.90 -
JAMES GASKET Mainshaft Seal - XL 35169-52
JAMES GASKET
$15.60A leaking mainshaft seal compromises transmission efficiency and creates messy fluid loss that signals deeper drivetrain problems. The JAMES GASKET Mainshaft Seal XL 35169-52 delivers OEM-equivalent sealing performance with precision manufacturing that...78081033- SKU:
- 78081033
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
$15.60 -
JAMES GASKET Oil Seal Retainer Kit - XL 35150-52
JAMES GASKET
$12.95Oil seal retainers are critical for preventing costly leaks and maintaining consistent pressure throughout your engine's lubrication system. The JAMES GASKET Oil Seal Retainer Kit XL 35150-52 delivers OEM-equivalent performance with precision engineering...78081032- SKU:
- 78081032
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- SPROCKET SHAFT
- RIDING STYLE:
- STREET
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
$12.95 -
JAMES GASKET Inspection Gasket Metal/Rubber - Big Twin 60567-90-DL
JAMES GASKET
$9.95Inspection cover leaks compromise engine cleanliness and invite contaminant intrusion—a problem that compounds quickly in high-performance applications. The James Gasket Inspection Gasket delivers a factory-engineered seal with molded rubber construction...78081027- SKU:
- 78081027
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- FEATURES:
- BEADED
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- STYLE:
- PRIMARY
- THICKNESS METRIC:
- 2.50 MM
- TYPE:
- INSPECTION COVER
- THICKNESS:
- 2,50 MM (0,100')
- THICKNESS IMPERIAL:
- 0,100'
- MATERIAL:
- RUBBER
$9.95 -
Wiseco Ring Set 3.518in. for Harley-Davidson FLH Electra Glide 1970-1984 3517X
WISECO
$52.95Piston ring quality directly impacts combustion efficiency, oil control, and overall engine longevity—especially critical in high-mileage or heavily-modified engines. The Wiseco 3517X is precision-engineered to restore compression sealing and reduce...3517X- SKU:
- 3517X
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PISTON DIAMETER IMPERIAL:
- 3.518'
- MODEL:
- X SERIES
- RING MATERIAL:
- STEEL
- UNITS:
- SET
- BORE - OVERSIZE:
- +0,020'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON RING
$52.95 -
DRAG SPECIALTIES Oil Cooler Cover for Jagg 3511-0001
DRAG SPECIALTIES
$16.95Oil coolers are essential for maintaining optimal viscosity and engine protection during high-load riding, but they can work against you in cooler conditions by dropping oil temps below the efficient operating window. The DRAG SPECIALTIES Oil Cooler...35110001- SKU:
- 35110001
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- BLACK
- LENGTH IMPERIAL:
- 8'
- LENGTH METRIC:
- 203 MM
- PRODUCT NAME:
- COVER
- TYPE:
- OIL COOLER
- UNITS:
- EACH
- MATERIAL:
- VINYL
- MODEL:
- SLIMLINE
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
$16.95 -
Wiseco Ring Set 3.508in. 1998 Buell S1 White Lightning 3507X
WISECO
$52.95Ring blowby and combustion leakage kill horsepower and compromise engine reliability—especially in high-revving, high-compression builds like the S1 White Lightning. The Wiseco 3507X ring set delivers precision-engineered sealing that maintains cylinder...3507X- SKU:
- 3507X
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE - OVERSIZE:
- +0,010'
- PISTON DIAMETER IMPERIAL:
- 3.508'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- RIDING STYLE:
- STREET
- MODEL:
- X SERIES
- RING MATERIAL:
- STEEL
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
$52.95 -
Wiseco Ring Set 3.503in 1996-1998 Harley Davidson FLHTCI Electra Glide Classic 3504X
WISECO
$52.95Piston ring sets are critical to engine longevity and performance—they manage compression, control oil consumption, and directly impact power output and fuel efficiency. The Wiseco 3504X is precision-engineered for your 1996-1998 Harley Davidson FLHTCI...3504X- SKU:
- 3504X
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BORE SIZE IMPERIAL:
- 3.498'
- MODEL:
- X SERIES
- PISTON DIAMETER IMPERIAL:
- 3.503'
- PRODUCT NAME:
- PISTON RING
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- RING MATERIAL:
- STEEL
- UNITS:
- SET
- RIDING STYLE:
- STREET
$52.95 -
JAMES GASKET Top End Gasket Kit - 88" 17054-99
JAMES GASKET
$125.95A complete top-end gasket rebuild requires precision components that seal under extreme pressure and temperature cycles—inferior gaskets lead to oil leaks, combustion blow-by, and compromised engine integrity. JAMES GASKET's 88" Top End Gasket Kit...20112101- SKU:
- 20112101
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- THICKNESS IMPERIAL:
- 0,036'
- THICKNESS METRIC:
- 0.91 MM
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$125.95 -
JAMES GASKET Top End Gasket Kit - 95" 17054-99-X
JAMES GASKET
$125.95A complete top-end gasket kit is essential for any 95" engine rebuild—it ensures a proper seal across all critical combustion chamber surfaces and prevents oil leakage that compromises performance and reliability. JAMES GASKET delivers OEM-quality...20112100- SKU:
- 20112100
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.875'
- THICKNESS IMPERIAL:
- 0,036'
- THICKNESS METRIC:
- 0.91 MM
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$125.95 -
JAMES GASKET Motor Gasket Kit - 95" 17055-99-X
JAMES GASKET
$130.95A complete engine rebuild demands precision sealing—any compromise on gaskets, oil seals, or O-rings will cost you reliability and performance. The JAMES GASKET Motor Gasket Kit delivers all the critical sealing components your 95" Panhead needs in one...20112099- SKU:
- 20112099
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,036'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 0.91 MM
$130.95 -
JOKER MACHINE Timing Cover - M8 - Black 02-972-2
JOKER MACHINE
$71.95A timing cover serves as the protective barrier between your engine's internal timing components and the outside environment. The JOKER MACHINE Timing Cover for M8 engines delivers precision-engineered protection while maintaining a clean, finished...09402022- SKU:
- 09402022
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- STYLE:
- MILLED
- TYPE:
- TIMING
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$71.95 -
JOKER MACHINE Timing Cover - M8 - Chrome 02-971-3
JOKER MACHINE
$78.95The JOKER MACHINE Timing Cover for M8 engines delivers both protection and aesthetics without compromising engine bay functionality. This chrome-finished cover shields your timing components from debris and moisture while providing the polished...09402021- SKU:
- 09402021
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- BILLET ALUMINUM
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- TIMING
- STYLE:
- SMOOTH
$78.95 -
JOKER MACHINE Timing Cover - M8 - Black 02-971-1
JOKER MACHINE
$72.95A quality timing cover protects critical engine components from debris, oil leakage, and environmental contamination while maintaining a clean, finished appearance on your M8 engine bay. The JOKER MACHINE timing cover combines OEM-fit precision with a...09402020- SKU:
- 09402020
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- BILLET ALUMINUM
- TYPE:
- TIMING
- COLOR/FINISH:
- BLACK ANODIZED
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
$72.95 -
DRAG SPECIALTIES Points Cover - Black 78042B
DRAG SPECIALTIES
$32.81A points cover serves as both protective housing and aesthetic accent for your ignition system—keeping dirt and moisture away from critical components while maintaining that finished look. If you're running classic Harley-Davidson architecture, this...09401617- SKU:
- 09401617
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- STYLE:
- CHROME SKULL
- TYPE:
- POINTS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$32.81 -
DRAG SPECIALTIES Points Cover - Chrome 78042
DRAG SPECIALTIES
$26.45A points cover serves as both a protective barrier for your ignition system and a visual statement on your engine. The DRAG SPECIALTIES Points Cover in chrome delivers the durability of die-cast construction while maintaining that polished, finished look...09401616- SKU:
- 09401616
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- STYLE:
- BLACK SKULL
- TYPE:
- POINTS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- MATERIAL:
- DIE-CAST
$26.45
