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 Cylinder Base Gasket C9207
COMETIC
$33.55A failed cylinder base gasket compromises compression, invites coolant and oil contamination, and can leave you stranded mid-season. The COMETIC C9207 is engineered to seal reliably under the extreme...09344665- SKU:
- 09344665
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.625'
- THICKNESS IMPERIAL:
- 0,020'
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS METRIC:
- 0.51 MM
$33.55 -
COMETIC Timing Cover Gasket C9306
COMETIC
$8.90A failing timing cover gasket compromises your engine's oil containment and invites contamination into critical engine components. The COMETIC C9306 is precision-engineered to seal reliably under...09344666- SKU:
- 09344666
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- THICKNESS IMPERIAL:
- 0,031'
- TYPE:
- POINT COVER
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.79 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- MATERIAL:
- FIBER
- TYPE:
- IGNITION COVER
$8.90 -
COMETIC Starter Motor Gasket C9312
COMETIC
$6.10A leaking starter motor gasket compromises engine sealing integrity and can lead to oil weepage that damages electrical components. The COMETIC C9312 delivers OEM-equivalent sealing performance with...09344667- SKU:
- 09344667
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- MOTOR
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- FIBER
- TYPE:
- STATOR
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
$6.10 -
COMETIC Cam Gear Gasket - XL C9316F1
COMETIC
$18.85A failing cam gear gasket compromises oil sealing at one of the most critical junctures in your engine—leading to oil seepage, contamination, and potential bearing damage. The COMETIC Cam Gear Gasket...09344668- SKU:
- 09344668
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.060'
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- CAM COVER
- UNITS:
- EACH
$18.85 -
COMETIC Circuit Breaker Gasket C9337
COMETIC
$4.20Gasket failure can sideline your engine faster than any other component—and racing demands zero tolerance for leaks. The COMETIC Circuit Breaker Gasket C9337 delivers a proven solution with its...09344685- SKU:
- 09344685
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- THICKNESS IMPERIAL:
- 0,032'
- UNITS:
- 10 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CIRCUIT BREAKER COVER
$4.20 -
COMETIC Rocker Cover Gasket - Big Twin C9342-125F
COMETIC
$81.85A leaking rocker cover gasket compromises engine performance and creates maintenance headaches. This COMETIC gasket delivers a reliable, lasting seal using premium materials engineered to withstand...09344686- SKU:
- 09344686
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- THICKNESS:
- 3,20 MM (0,125')
- TYPE:
- ROCKER ARM
- UNITS:
- PAIR
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,125'
- MATERIAL:
- FIBER
- THICKNESS METRIC:
- 3.20 MM
$81.85 -
COMETIC Rocker Cover Gasket - Big Twin C9346
COMETIC
$17.90A leaking rocker cover gasket compromises engine sealing and invites oil contamination into your intake tract—exactly what your Big Twin doesn't need. The COMETIC C9346 delivers a precision seal...09344687- SKU:
- 09344687
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- FELT
- THICKNESS:
- 3,20 MM (0,125')
- TYPE:
- ROCKER COVER
- THICKNESS METRIC:
- 3.20 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,125'
- UNITS:
- 10 PACK
$17.90 -
COMETIC Oil Pump Cover Gasket C9385
COMETIC
$9.50Oil leaks at the pump cover can compromise engine cleanliness and cost you reliability on the track or street. The COMETIC Oil Pump Cover Gasket C9385 delivers a precision seal using advanced...09344688- SKU:
- 09344688
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MOUNTING POSITION:
- OUTER
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- FIBER
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS METRIC:
- 0.25 MM
- THICKNESS IMPERIAL:
- 0,010'
$9.50 -
COMETIC Oil Pump Cover Gasket C9388
COMETIC
$10.60An oil pump cover gasket is critical to maintaining system integrity—any leak here compromises oil pressure, circulation, and engine longevity. The COMETIC C9388 delivers factory-grade sealing with...09344690- SKU:
- 09344690
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MOUNTING POSITION:
- INNER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- FIBER
- THICKNESS METRIC:
- 0.25 MM
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- THICKNESS:
- 0,25 MM (0,010')
$10.60Qty in Cart: 0Quantity:Price:$10.60Subtotal: -
COMETIC Oil Pump Cover Gasket C9389
COMETIC
$9.50An oil pump cover gasket is a critical sealing component that prevents oil leakage at the pump cover interface, protecting your engine from loss of lubrication and contamination. COMETIC's C9389...09344691- SKU:
- 09344691
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- FIBER
- MOUNTING POSITION:
- OUTER
- THICKNESS METRIC:
- 0.25 MM
$9.50Qty in Cart: 0Quantity:Price:$9.50Subtotal: -
COMETIC Oil Pump Cover Gasket C9390
COMETIC
$7.40An oil pump cover gasket is a critical sealing component that prevents pressurized oil from leaking past the pump housing, which can lead to catastrophic engine damage if left unchecked. COMETIC's...09344692- SKU:
- 09344692
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- THICKNESS IMPERIAL:
- 0,010'
- MATERIAL:
- FIBER
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS METRIC:
- 0.25 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$7.40Qty in Cart: 0Quantity:Price:$7.40Subtotal: -
COMETIC Oil Pump Cover Gasket C9391
COMETIC
$6.40An oil pump cover gasket is a critical seal that prevents pressurized oil leakage at the pump housing—a common failure point in high-performance engines running elevated RPMs and boost levels...09344693- SKU:
- 09344693
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- FIBER
- THICKNESS METRIC:
- 0.25 MM
$6.40 -
COMETIC Oil Pump Cover Gasket C9392
COMETIC
$10.60An oil pump cover gasket failure can quickly turn into catastrophic engine damage, making this component a critical maintenance item for any serious racer or mechanic. The COMETIC C9392 provides the...09344694- SKU:
- 09344694
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- THICKNESS IMPERIAL:
- 0,010'
- MATERIAL:
- FIBER
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS METRIC:
- 0.25 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$10.60 -
COMETIC Oil Pump Cover Gasket C9393
COMETIC
$6.70An oil pump cover gasket is critical to maintaining a sealed, leak-free oil system—any seepage compromises lubrication efficiency and can lead to costly engine damage. The COMETIC C9393 is engineered...09344695- SKU:
- 09344695
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- FIBER
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS METRIC:
- 0.25 MM
- THICKNESS IMPERIAL:
- 0,010'
$6.70 -
COMETIC Oil Pump Cover Gasket C9394
COMETIC
$6.40An oil pump cover gasket is critical for maintaining a sealed oil circulation system—any leak compromises lubrication efficiency and can lead to catastrophic engine damage. The COMETIC C9394 is...09344696- SKU:
- 09344696
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- THICKNESS:
- 0,25 MM (0,010')
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- FIBER
- THICKNESS METRIC:
- 0.25 MM
$6.40Qty in Cart: 0Quantity:Price:$6.40Subtotal: -
COMETIC Oil Pump Cover Gasket C9399
COMETIC
$7.40An oil pump cover gasket is a critical sealing component that prevents oil leakage at the pump housing, maintaining proper lubrication pressure and protecting your engine from costly internal damage...09344698- SKU:
- 09344698
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- THICKNESS IMPERIAL:
- 0,031'
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.79 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- FIBER
- THICKNESS:
- 0,79 MM (0,031')
$7.40Qty in Cart: 0Quantity:Price:$7.40Subtotal: -
COMETIC Pushrod Cover Seals C9408-25
COMETIC
$12.70A leaking pushrod cover gasket compromises oil containment and can lead to engine bay mess and potential performance issues. The COMETIC Pushrod Cover Seals C9408-25 delivers OEM-grade sealing...09344700- SKU:
- 09344700
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 25 PACK
- TYPE:
- PUSHROD COVER
$12.70 -
COMETIC Pushrod Cover Seals C9409-25
COMETIC
$12.70Pushrod cover seals are critical wear items that deteriorate over time, leading to oil seepage and potential engine damage if ignored. The COMETIC C9409-25 seal kit provides OEM-specification...09344701- SKU:
- 09344701
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- 25 PACK
- RIDING STYLE:
- STREET
- TYPE:
- PUSHROD COVER
- PRODUCT NAME:
- GASKET
$12.70Qty in Cart: 0Quantity:Price:$12.70Subtotal: -
COMETIC Valve Guide C9419-4
COMETIC
$8.90Valve guides are critical to maintaining proper valve stem clearance and preventing catastrophic engine wear. The COMETIC Valve Guide C9419-4 delivers precision-engineered tolerance control that...09344702- SKU:
- 09344702
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,79 MM (0,031')
- TYPE:
- VALVE GUIDE
- UNITS:
- 4 PACK
- MATERIAL:
- FIBER
- THICKNESS IMPERIAL:
- 0,031'
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
$8.90Qty in Cart: 0Quantity:Price:$8.90Subtotal: -
COMETIC O-Ring C9445
COMETIC
$5.30Proper sealing is non-negotiable in high-performance engine builds, and the COMETIC O-Ring C9445 delivers the reliability you need to prevent costly leaks and maintain consistent compression. Whether...09344703- SKU:
- 09344703
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- OIL PUMP
- MATERIAL:
- NITRILE RUBBER
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
$5.30
