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
-
On Sale
COMETIC Head Gasket - .03" - 3 13/16" C9692
COMETIC
MSRP: $61.90Now: $55.71Was: $61.90A head gasket failure can compromise your engine's integrity and leave you stranded. The COMETIC C9692 uses multi-layer steel construction with load control embossments to maintain consistent sealing...09341355- SKU:
- 09341355
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.8125'
- PRODUCT NAME:
- GASKET
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,76 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- BORE SIZE:
- 3,8125'
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
MSRP: $61.90Now: $55.71Was: $61.90 -
On Sale
COMETIC Cam Service Gasket Kit C9623F
COMETIC
MSRP: $26.20Now: $23.58Was: $26.20A cam change demands precision—and using OEM-spec gaskets, seals, and O-rings is non-negotiable if you want to avoid oil leaks and timing inconsistencies down the line. The COMETIC Cam Service Gasket...09341357- SKU:
- 09341357
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
- TYPE:
- CAM CHANGE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
MSRP: $26.20Now: $23.58Was: $26.20 -
On Sale
COMETIC Starter Motor Mount Gasket C9330F
COMETIC
Now: $5.76Was: $6.40A leaking starter motor mount gasket compromises engine sealing and can lead to oil weepage and potential starter issues. COMETIC's C9330F gasket delivers reliable sealing with precision engineering,...09341371- SKU:
- 09341371
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 10 PACK
- THICKNESS:
- 1,52 MM (0,060')
- RIDING STYLE:
- STREET
- TYPE:
- STARTER HOUSING
- THICKNESS METRIC:
- 1.52 MM
Now: $5.76Was: $6.40Qty in Cart: 0Quantity:Price:Now: $5.76Was: $6.40Subtotal: -
On Sale
COMETIC Starter Seal - Twin Cam C9201F1
COMETIC
MSRP: $4.95Now: $4.46Was: $4.95Starter seal failures lead to oil leaks, reduced engine efficiency, and costly repairs down the line. The COMETIC Starter Seal for Twin Cam engines delivers long-term reliability with a...09350849- SKU:
- 09350849
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- STARTER
- UNITS:
- EACH
- MATERIAL:
- BUNA RUBBER
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
MSRP: $4.95Now: $4.46Was: $4.95Qty in Cart: 0Quantity:Price:MSRP: $4.95Now: $4.46Was: $4.95Subtotal: -
On Sale
COMETIC Output Gear Seal C9200
COMETIC
Now: $48.33Was: $53.70Transmission output seals are critical wear items that prevent fluid loss and contamination in your Twin Cam drivetrain. A failed seal compromises lubrication, accelerates internal wear, and can...09341392- SKU:
- 09341392
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- MATERIAL:
- VITON
- PRODUCT NAME:
- GASKET
- TYPE:
- OUTPUT GEAR
- UNITS:
- 10 PACK
Now: $48.33Was: $53.70 -
On Sale
COMETIC Oil Pan Gasket - Twin Cam C9646F1
COMETIC
MSRP: $13.60Now: $12.24Was: $13.60A failing oil pan gasket will cost you far more in engine damage than the price of prevention. This COMETIC gasket eliminates weeping leaks and maintains consistent oil pressure without requiring...09344810- SKU:
- 09344810
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- EACH
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- OIL PAN
- RIDING STYLE:
- STREET
MSRP: $13.60Now: $12.24Was: $13.60 -
On Sale
COMETIC Cam Cover Gasket - Twin Cam C9575F5
COMETIC
Now: $39.06Was: $43.40Cam cover gaskets are a critical seal that prevents oil leakage and contamination from reaching your engine's most precision-critical components. A failing gasket forces oil past the cam cover,...20111500- SKU:
- 20111500
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- UNITS:
- 5 PACK
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- CAM COVER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
Now: $39.06Was: $43.40 -
On Sale
COMETIC Top End Gasket Kit - Big Bore - Big Twin - EST C9766
COMETIC
MSRP: $142.75Now: $128.48Was: $142.75A top-end rebuild demands gasket integrity that matches your engine's demands—and thermal stress is the silent killer that takes down inferior seals. The COMETIC EST C9766 Gasket Kit solves this with...DS172078- SKU:
- DS172078
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- BORE SIZE:
- 3,625'
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.625'
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- RUBBER
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
MSRP: $142.75Now: $128.48Was: $142.75 -
On Sale
COMETIC Seal C10213
COMETIC
Now: $12.51Was: $13.90Engine seal integrity directly impacts compression, fuel efficiency, and longevity. The COMETIC Seal C10213 is engineered with premium fuel-resistant materials that resist creep, cracking, and...09351001- SKU:
- 09351001
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
- APPLICATION:
- SHIFTER SHAFT
Now: $12.51Was: $13.90Qty in Cart: 0Quantity:Price:Now: $12.51Was: $13.90Subtotal: -
On Sale
COMETIC Top End Gasket Kit - 883 C9192
COMETIC
MSRP: $229.90Now: $206.91Was: $229.90A top-end gasket failure can sideline your engine at the worst possible moment—and replacing individual gaskets is a false economy. The COMETIC C9192 kit eliminates guesswork by bundling all...09344803- SKU:
- 09344803
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE IMPERIAL:
- 3.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE:
- 3,000'
- DISPLACEMENT:
- 883 CC
- MATERIAL:
- RUBBER
- TYPE:
- TOP END
- UNITS:
- KIT
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
MSRP: $229.90Now: $206.91Was: $229.90Qty in Cart: 0Quantity:Price:MSRP: $229.90Now: $206.91Was: $229.90Subtotal: -
On Sale
COMETIC Transmission/Engine Gasket - FL C9190
COMETIC
MSRP: $25.15Now: $22.64Was: $25.15Transmission and engine gasket integrity directly impacts your engine's reliability and performance—a failed gasket means oil leakage, potential overheating, and costly downtime. The COMETIC C9190...09341235- SKU:
- 09341235
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
MSRP: $25.15Now: $22.64Was: $25.15 -
On Sale
COMETIC Outer Rocker Gasket C9208
COMETIC
MSRP: $22.00Now: $19.80Was: $22.00Rocker cover gasket failure leads to oil seepage, contaminated spark plug wells, and potential engine damage—problems that compound quickly in high-performance applications. The COMETIC Outer Rocker...09341398- SKU:
- 09341398
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- MOUNTING POSITION:
- OUTER
- TYPE:
- ROCKER COVER
- UNITS:
- PAIR
- PRODUCT NAME:
- GASKET
- MOUNTING POSITION:
- UPPER
- RIDING STYLE:
- STREET
MSRP: $22.00Now: $19.80Was: $22.00Qty in Cart: 0Quantity:Price:MSRP: $22.00Now: $19.80Was: $22.00Subtotal: -
On Sale
COMETIC Head Gasket - .040" - 95" - Twin Cam C9722
COMETIC
MSRP: $61.90Now: $55.71Was: $61.90A properly sealed combustion chamber is non-negotiable for consistent power output and engine longevity. The COMETIC C9722 head gasket uses multi-layer steel construction with load control...DS172105- SKU:
- DS172105
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 1,02 MM (0,040')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- MATERIAL:
- LAYERED STEEL
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
MSRP: $61.90Now: $55.71Was: $61.90 -
On Sale
EASTERN MOTORCYCLE PARTS Flywheel Thrust Washers A-23973-41
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $26.95Flywheel thrust washers are critical wear items that take direct mechanical stress every time your engine fires. The EASTERN MOTORCYCLE PARTS A-23973-41 is a direct replacement built to OEM...DS194042- SKU:
- DS194042
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- FLYWHEEL
- UNITS:
- PAIR
- MATERIAL:
- BRONZE
- PRODUCT NAME:
- THRUST WASHER
- SIZE IMPERIAL:
- STANDARD
MSRP: $26.95Now: $24.52Was: $26.95Qty in Cart: 0Quantity:Price:MSRP: $26.95Now: $24.52Was: $26.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Flywheel Thrust Washers A-6506
EASTERN MOTORCYCLE PARTS
MSRP: $35.95Now: $32.71Was: $35.95Flywheel thrust washers are critical wear components that manage axial load and prevent crankshaft movement in your engine. Over time, these bronze washers wear down, leading to increased play,...DS194043- SKU:
- DS194043
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- BRONZE
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- PRODUCT NAME:
- THRUST WASHER
- SIZE IMPERIAL:
- STANDARD
- TYPE:
- FLYWHEEL
MSRP: $35.95Now: $32.71Was: $35.95 -
On Sale
EASTERN MOTORCYCLE PARTS Flywheel Thrust Washer Set - 11 pack A-24100-SET
EASTERN MOTORCYCLE PARTS
MSRP: $68.95Now: $62.74Was: $68.95Flywheel end-play is critical to engine longevity—too much clearance causes damaging crankshaft movement, while too little creates binding that murders bearing life. This 11-piece thrust washer...DS194056- SKU:
- DS194056
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- TYPE:
- THRUST
- UNITS:
- SET OF 11
MSRP: $68.95Now: $62.74Was: $68.95 -
On Sale
EASTERN MOTORCYCLE PARTS Cam Shims - XL A-6771
EASTERN MOTORCYCLE PARTS
Now: $6.10Was: $6.70Proper cam shimming is non-negotiable when installing new cams—incorrect shim selection leads to valve timing issues, lost power, and potential engine damage. The EASTERN MOTORCYCLE PARTS Cam Shims...DS194072- SKU:
- DS194072
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- TYPE:
- 1ST GEAR
- TYPE:
- 4TH GEAR
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SHIM
- SIZE IMPERIAL:
- 0.015'
- TYPE:
- 3RD GEAR
- TYPE:
- CAM
Now: $6.10Was: $6.70 -
On Sale
EASTERN MOTORCYCLE PARTS Lock Tab Washer A-33362-52
EASTERN MOTORCYCLE PARTS
Now: $9.65Was: $10.60Transmission work demands precision hardware—overlooking lock tab washers during rebuild or service is a guaranteed path to fastener failure and catastrophic drivetrain damage. The Eastern Motorcycle...09500411- SKU:
- 09500411
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- PRODUCT NAME:
- WASHER
- TYPE:
- LOCK TAB
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
Now: $9.65Was: $10.60Qty in Cart: 0Quantity:Price:Now: $9.65Was: $10.60Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Crankcase Roller Bearings A-9263-12
EASTERN MOTORCYCLE PARTS
MSRP: $14.95Now: $13.60Was: $14.95Crankcase roller bearings are critical to engine longevity, reducing friction between rotating components and preventing catastrophic bearing failure under sustained load. Eastern Motorcycle Parts'...09500533- SKU:
- 09500533
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- SIZE:
- OVERSIZE (+0,0004')
- TYPE:
- ROLLER
- UNITS:
- 12 PACK
- PRODUCT NAME:
- BEARING
- SIZE IMPERIAL:
- OVERSIZE (+0.0004')
MSRP: $14.95Now: $13.60Was: $14.95 -
On Sale
EASTERN MOTORCYCLE PARTS Oil Line O-6-084
EASTERN MOTORCYCLE PARTS
MSRP: $75.95Now: $69.11Was: $75.95Reliable oil line routing is critical to maintaining proper lubrication pressure and preventing system degradation in high-performance applications. The EASTERN MOTORCYCLE PARTS Oil Line O-6-084...09500538- SKU:
- 09500538
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- MATERIAL:
- STEEL
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- STYLE:
- FEED LINE
- TYPE:
- OIL
- PRODUCT NAME:
- LINE KIT
- UNITS:
- EACH
MSRP: $75.95Now: $69.11Was: $75.95Qty in Cart: 0Quantity:Price:MSRP: $75.95Now: $69.11Was: $75.95Subtotal:
