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
-
COMETIC Oil Pump Rebuild Gasket C9168
COMETIC
$28.30A compromised oil pump gasket kit doesn't just leak—it starves your engine of critical lubrication and invites catastrophic damage. The COMETIC C9168 rebuild gasket kit restores a complete seal with OEM-quality materials, ensuring consistent oil delivery...09341218- SKU:
- 09341218
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$28.30 -
COMETIC Complete Gasket Kit - 3-5/8" C9164
COMETIC
$356.95A complete gasket kit eliminates the guesswork and potential for leaks across your engine bay—every critical seal is engineered from the ground up to handle racing demands and extended engine life. COMETIC's layered approach to gasket design means you're...09341216- SKU:
- 09341216
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,625'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$356.95Qty in Cart: 0Quantity:Price:$356.95Subtotal: -
COMETIC Complete Gasket Kit - Twin Cam - .030" C9161
COMETIC
$209.95A complete gasket kit is the foundation of a reliable, leak-free engine—especially critical for Twin Cam applications where precision sealing directly impacts performance and longevity. COMETIC's complete kit eliminates the guesswork of sourcing...09341215- SKU:
- 09341215
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- BORE SIZE:
- 3,875'
- TYPE:
- COMPLETE
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
$209.95 -
JAMES GASKET Cam Cover Gasket - XL 25263-86-X
JAMES GASKET
$37.30Cam cover gaskets are critical sealing components that prevent oil leakage from your engine's top end—a common failure point that can lead to messy drips and potential internal damage if left unaddressed. The JAMES GASKET XL 25263-86-X is engineered to...09341185- SKU:
- 09341185
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- UNITS:
- 5 PACK
$37.30 -
JAMES GASKET Cam Cover Gasket - Big Twin 25225-36-CX
JAMES GASKET
$21.10Cam cover gasket failures lead to oil seepage, reduced engine efficiency, and costly secondary damage if left unaddressed. The JAMES GASKET Cam Cover Gasket is engineered for precise fitment and reliable sealing, restoring your Big Twin's cam chest...09341184- SKU:
- 09341184
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- MATERIAL:
- PAPER
- UNITS:
- 5 PACK
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- CAM COVER
- PRODUCT NAME:
- GASKET
$21.10 -
COMETIC Base Gasket - 3-5/8" - .010" C9532
COMETIC
$33.55A head gasket failure can cost you an entire race weekend or months of engine downtime. The COMETIC Base Gasket delivers the reliability and sealing integrity that high-performance engines demand, with MLS construction that maintains cylinder pressure...09340780- SKU:
- 09340780
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD
- MATERIAL:
- STEEL
- THICKNESS METRIC:
- 0.25 MM
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
$33.55 -
COMETIC Base Gasket - Twin Cam 4" - .020" C9738
COMETIC
$33.55A quality head gasket is the foundation of engine reliability—it seals combustion pressure and maintains compression under extreme heat and load. The COMETIC Base Gasket for Twin Cam engines uses multi-layer steel construction with load control...09340776- SKU:
- 09340776
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- STYLE:
- STANDARD
- THICKNESS METRIC:
- 0.51 MM
- PRODUCT NAME:
- GASKET
- MATERIAL:
- STEEL
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
$33.55 -
COMETIC Top End Gasket - Standard - .030" C9845
COMETIC
$150.10A failed top end gasket can sideline your engine and derail your season. The COMETIC C9845 uses Extreme Sealing Technology to eliminate hot spots and prevent gasket failure through superior heat dissipation—keeping your combustion seal reliable under...09340771- SKU:
- 09340771
- Availability:
- Ships Same Business Day
- Weight:
- 0.83 LBS
- BORE SIZE:
- 3,750'
- DISPLACEMENT:
- 88'
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,030'
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- THICKNESS METRIC:
- 0.76 MM
$150.10 -
COMETIC Top End Gasket - FL/FLH C9968
COMETIC
$135.40A top-end rebuild demands precision—and the wrong gaskets will compromise your seal integrity, allowing combustion pressure to escape and coolant to breach critical areas. COMETIC's EST (Extreme Sealing Technology) gasket kit eliminates guesswork with...09340770- SKU:
- 09340770
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- VITON
- BORE SIZE IMPERIAL:
- 3.437'
- MATERIAL:
- FOAM
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE:
- 3,437'
- UNITS:
- KIT
$135.40 -
JAMES GASKET Intake Seal - XL/Buell 26995-98
JAMES GASKET
$37.70A properly sealed intake manifold is critical for maintaining fuel atomization and preventing vacuum leaks that compromise throttle response and fuel economy. The JAMES GASKET Intake Seal delivers OEM-grade sealing performance with the durability...09340549- SKU:
- 09340549
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE MANIFOLD
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
$37.70 -
JAMES GASKET Gasket Kit - Flathead 17027-36
JAMES GASKET
$90.95A complete engine rebuild demands precision sealing—and this James Gasket kit eliminates the guesswork by bundling every gasket, oil seal, and O-ring your Panhead engine needs in one factory-engineered package. U.S.A.-made quality ensures consistent...09340546- SKU:
- 09340546
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- UNITS:
- KIT
$90.95 -
JAMES GASKET Carb Back Plate Gasket 29583-01
JAMES GASKET
$15.30A worn or damaged carb back plate gasket compromises fuel atomization and can introduce vacuum leaks that throw off your air-fuel ratio. The JAMES GASKET Carb Back Plate Gasket 29583-01 seals the critical interface between your carburetor and intake...09340324- SKU:
- 09340324
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- MOUNTING POSITION:
- CARBURETOR/THROTTLE BODY TO BACK PLATE
- STYLE:
- CARBURETOR
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- BACKPLATE
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 10 PACK
$15.30 -
JAMES GASKET Derby Cover Paper Gasket 25416-99-X
JAMES GASKET
$36.80A leaking derby cover isn't just messy—it's a sign your engine seal has failed, and that means oil is finding its way where it shouldn't. The JAMES GASKET Derby Cover Paper Gasket delivers a reliable, OEM-quality seal that stops seepage before it starts,...09340289- SKU:
- 09340289
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- THICKNESS:
- 0,80 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- UNITS:
- 5 PACK
- TYPE:
- DERBY COVER
$36.80 -
JAMES GASKET Primary Gasket 34955-04
JAMES GASKET
$95.70A reliable primary gasket is non-negotiable for maintaining combustion chamber integrity and preventing oil seepage in high-stress engine environments. The JAMES GASKET Primary Gasket 34955-04 delivers OEM-equivalent performance with silicone beading...09340288- SKU:
- 09340288
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- UNITS:
- 5 PACK
- FEATURES:
- BEADED
- MATERIAL:
- PAPER
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- COVER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,031'
$95.70 -
DRAG SPECIALTIES Gasket Board - Big Twin 0934-0274
DRAG SPECIALTIES
$120.95If you're running a shop that rebuilds Big Twin motors, you need a system that keeps every gasket, seal, and O-ring organized and visible—so you're never caught unprepared mid-rebuild. This Drag Specialties display board does exactly that, giving you a...09340274- SKU:
- 09340274
- Availability:
- Ships Same Business Day
- Weight:
- 5.30 LBS
- TYPE:
- GASKET
- PRODUCT NAME:
- DISPLAY BOARD
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$120.95 -
JAMES GASKET Head Gasket - XL883 16664-86
JAMES GASKET
$48.30A proper head gasket seal is non-negotiable for reliable engine operation—any compromise here leads to coolant leaks, combustion blow-by, and catastrophic engine damage. The JAMES GASKET Head Gasket for XL883 engines delivers OEM-equivalent performance...09340260- SKU:
- 09340260
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- -
- THICKNESS IMPERIAL:
- 0,045'
- UNITS:
- 5 PACK
- BORE SIZE:
- -
- BORE SIZE IMPERIAL:
- -
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- CYLINDER HEAD
- PRODUCT NAME:
- GASKET
$48.30 -
DRAG SPECIALTIES Rear Motor Mount - FLT 63266
DRAG SPECIALTIES
$69.91OEM motor mounts deteriorate under the stress of repeated acceleration and braking cycles, leading to excessive vibration, noise, and potential drivetrain misalignment. The DRAG SPECIALTIES Rear Motor Mount replaces that worn rubber with engineered...09330134- SKU:
- 09330134
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- UNITS:
- EACH
- PRODUCT NAME:
- MOUNT
$69.91Qty in Cart: 0Quantity:Price:$69.91Subtotal: -
CUSTOM CYCLE ENGINEERING Rear Motor Mount - Dyna DMM 2014-2
CUSTOM CYCLE ENGINEERING
$646.95Stock motor mounts on your Dyna are engineering compromises—designed for comfort over control, allowing excessive engine movement that kills power delivery and accelerates wear on surrounding components. The CUSTOM CYCLE ENGINEERING Rear Motor Mount...09330125- SKU:
- 09330125
- Availability:
- Ships Same Business Day
- Weight:
- 2.91 LBS
- COLOR/FINISH:
- BLACK
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- BASE COLOR:
- BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- MOUNT
$646.95 -
CUSTOM CYCLE ENGINEERING Front Motor Mount - Dyna DMM 2014-1E
CUSTOM CYCLE ENGINEERING
$559.95Stock motor mounts on your Dyna are engineered for comfort, not performance—allowing excessive powertrain movement that kills handling precision and accelerates wear on surrounding components. This Custom Cycle Engineering front motor mount system locks...09330123- SKU:
- 09330123
- Availability:
- Ships Same Business Day
- Weight:
- 3.51 LBS
- PRODUCT NAME:
- MOUNT
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
- MOUNTING POSITION:
- FRONT
- TYPE:
- ENGINE
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
$559.95Qty in Cart: 0Quantity:Price:$559.95Subtotal: -
CUSTOM CYCLE ENGINEERING Front Motor Mount - FLH CCE 2015-1
CUSTOM CYCLE ENGINEERING
$441.95Stock motor mounts on FLH Dressers often leave your powertrain fighting against chassis misalignment, robbing you of smooth operation and creating unnecessary stress on engine components. The CCE Front Motor Mount solves this by giving you precise,...09330121- SKU:
- 09330121
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- PRODUCT NAME:
- MOUNT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- MOUNTING POSITION:
- FRONT
- MATERIAL:
- BILLET ALUMINUM
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
$441.95
