Harley Seals/Orings and Kits
Harley Bike Engine Seals, O-Rings & Kits at JJ Motorsports
Keep your Harley leak-free with premium Cometic seals and O-rings from JJ Motorsports, featuring Viton valve stem seals, pushrod tube O-rings, and crankcase seals for reliable performance on Twin Cam, Evo, Sportster, and Big Twin engines. These high-temp, oil-resistant components ensure perfect sealing and long-term durability.
Shop Cometic for race-proven quality. Explore related categories such as Harley engine for gaskets and rebuild kits, or Harley for cams and oil pumps to complete your engine refresh.
Top Harley Engine Seals & O-Rings
- Cometic Engine Crankcase Seal C9682 – High-quality main seal for Twin Cam and Evo crankcases; prevents oil leaks at the mainshaft.
- Cometic Valve Stem Seal Viton C9166 – Viton valve stem seals; heat- and oil-resistant for Big Twin and Sportster heads.
- Cometic Pushrod Tube O-Ring C9584 – Pushrod tube O-ring set; perfect seal between cylinder and rocker box on Evo and Twin Cam.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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On Sale
COMETIC Pushrod Cover Seals C9369
COMETIC
Now: $10.44Was: $11.60Pushrod cover leaks are a common source of oil seepage that compounds over time, potentially contaminating spark plug wells and compromising ignition reliability. The COMETIC C9369 Pushrod Cover...09350832- SKU:
- 09350832
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- PUSHROD COVER
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
Now: $10.44Was: $11.60Qty in Cart: 0Quantity:Price:Now: $10.44Was: $11.60Subtotal: -
On Sale
COMETIC Shifter Lever Shaft Seal C9370-1
COMETIC
MSRP: $4.95Now: $4.46Was: $4.95Shifter lever shaft seals endure extreme heat cycles and fluid exposure in high-performance transmissions—component failure here means slippage, leakage, and potential drivetrain damage. The COMETIC...09350833- SKU:
- 09350833
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- MATERIAL:
- VITON
- APPLICATION:
- SHIFTER SHAFT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $4.95Now: $4.46Was: $4.95 -
On Sale
COMETIC Valve Stem Seal C9424-1
COMETIC
MSRP: $4.95Now: $4.46Was: $4.95Valve stem seals are critical components that prevent oil from leaking past the valve guides and into the combustion chamber—a problem that leads to blue smoke, increased oil consumption, and...09350835- SKU:
- 09350835
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- MATERIAL:
- VITON
- OUTSIDE DIAMETER IMPERIAL:
- 0.625'
- TYPE:
- VALVE STEM
- RIDING STYLE:
- STREET
MSRP: $4.95Now: $4.46Was: $4.95 -
On Sale
COMETIC Carb Backplate O-Ring C9686
COMETIC
MSRP: $6.25Now: $5.63Was: $6.25A worn or deteriorated carb backplate O-ring can cause fuel leaks, air leaks, and performance inconsistencies that compromise your engine's tuning. The COMETIC C9686 is engineered from premium...09350373- SKU:
- 09350373
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- CARBURETOR BACKING PLATE
- RIDING STYLE:
- STREET
- MATERIAL:
- NITRILE
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
MSRP: $6.25Now: $5.63Was: $6.25Qty in Cart: 0Quantity:Price:MSRP: $6.25Now: $5.63Was: $6.25Subtotal: -
On Sale
COMETIC Valve Stem Seal C9153
COMETIC
Now: $68.40Was: $76.00Valve stem seals are critical to preventing oil from seeping into your combustion chambers—a problem that degrades performance, increases emissions, and accelerates engine wear. The COMETIC C9153 is...09350137- SKU:
- 09350137
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- TYPE:
- VALVE STEM
- MATERIAL:
- VITON
- UNITS:
- 25 PACK
- PRODUCT NAME:
- SEAL
Now: $68.40Was: $76.00 -
On Sale
COMETIC Valve Stem Seal - Viton C9166
COMETIC
Now: $21.78Was: $24.20Valve stem seals are critical to preventing oil from seeping into your combustion chambers—a problem that degrades performance, increases emissions, and accelerates wear. The COMETIC Viton C9166...09350138- SKU:
- 09350138
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- TYPE:
- VALVE STEM
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
Now: $21.78Was: $24.20 -
On Sale
COMETIC Oil Pump Inner Small O-Ring C9449
COMETIC
Now: $6.66Was: $7.40A failing oil pump seal compromises lubrication pressure across your entire engine, risking catastrophic bearing wear and sudden failure. The COMETIC Oil Pump Inner Small O-Ring (C9449) is engineered...09350159- SKU:
- 09350159
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- APPLICATION:
- OIL PUMP
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
Now: $6.66Was: $7.40 -
On Sale
COMETIC Derby Cover O-Ring - Big Twin C9662
COMETIC
Now: $13.86Was: $15.40The COMETIC Derby Cover O-Ring is engineered to prevent oil leakage and maintain proper crankcase sealing on your Big Twin—critical for consistent engine performance and longevity. Built from premium...09350160- SKU:
- 09350160
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- DERBY COVER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- UNITS:
- 5 PACK
- MATERIAL:
- NITRILE RUBBER
Now: $13.86Was: $15.40Qty in Cart: 0Quantity:Price:Now: $13.86Was: $15.40Subtotal: -
On Sale
COMETIC Cam Support O-Ring C9631
COMETIC
MSRP: $2.95Now: $2.88Was: $3.20Cam support o-rings are critical sealing components that prevent oil leakage and maintain pressure integrity in your engine's cam cover assembly. A compromised o-ring leads to oil weeping, potential...09350165- SKU:
- 09350165
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CAM SUPPORT
- UNITS:
- 10 PACK
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
MSRP: $2.95Now: $2.88Was: $3.20 -
On Sale
COMETIC EFI Map Senser Seal - Twin Cam C9630
COMETIC
Now: $11.43Was: $12.70Engine gasket seals demand absolute reliability—even minor fuel leakage or pressure loss compromises performance and risks engine damage. The Cometic EFI Map Sensor Seal (C9630) is engineered...09350166- SKU:
- 09350166
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CAM MANIFOLD
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- SILICONE
Now: $11.43Was: $12.70Qty in Cart: 0Quantity:Price:Now: $11.43Was: $12.70Subtotal: -
On Sale
COMETIC Umbrella Seal C9481
COMETIC
Now: $7.56Was: $8.40Umbrella seals are critical for preventing oil seepage and maintaining pressure integrity in high-performance engines, especially under sustained boost and elevated operating temperatures. The...09350167- SKU:
- 09350167
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- APPLICATION:
- UMBRELLA VALVE
Now: $7.56Was: $8.40Qty in Cart: 0Quantity:Price:Now: $7.56Was: $8.40Subtotal: -
On Sale
COMETIC O-Ring C9459
COMETIC
MSRP: $2.95Now: $2.88Was: $3.20Cometic O-Ring seals are engineered to withstand extreme pressures and temperature fluctuations in high-performance applications where standard gaskets fail. Whether you're building a forced...09350170- SKU:
- 09350170
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- DIPSTICK COVER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
- APPLICATION:
- PUSHROD COVER
- MATERIAL:
- NITRILE RUBBER
MSRP: $2.95Now: $2.88Was: $3.20 -
On Sale
COMETIC Intake Manifold Seal Kit - Evolution C9131
COMETIC
MSRP: $14.95Now: $13.46Was: $14.95Intake manifold seal degradation creates vacuum leaks that compromise fuel mixture precision and reduce engine efficiency—problems that compound over time. The COMETIC Evolution C9131 kit delivers...09350172- SKU:
- 09350172
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INTAKE MANIFOLD TO CARBURETOR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- SEAL
MSRP: $14.95Now: $13.46Was: $14.95Qty in Cart: 0Quantity:Price:MSRP: $14.95Now: $13.46Was: $14.95Subtotal: -
On Sale
COMETIC Carb/Manifold Sealing Ring C9088
COMETIC
MSRP: $10.95Now: $9.86Was: $10.95Carburetor and manifold sealing rings are critical interfaces in your fuel system—a leak or deterioration here compromises air-fuel ratios and can cause fuel seepage into your engine bay. The COMETIC...09350173- SKU:
- 09350173
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- FIBER
- APPLICATION:
- INTAKE MANIFOLD TO CARBURETOR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- THICKNESS IMPERIAL:
- 0.031'
- UNITS:
- EACH
MSRP: $10.95Now: $9.86Was: $10.95Qty in Cart: 0Quantity:Price:MSRP: $10.95Now: $9.86Was: $10.95Subtotal: -
On Sale
COMETIC Derby Cover Bolt Washer C9363
COMETIC
MSRP: $5.20Now: $4.68Was: $5.20Derby cover bolt washers are a small but critical component that prevents fasteners from loosening due to vibration and thermal cycling—a common failure point in high-performance engines. The COMETIC...09350177- SKU:
- 09350177
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- WASHER
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- APPLICATION:
- DERBY COVER
MSRP: $5.20Now: $4.68Was: $5.20Qty in Cart: 0Quantity:Price:MSRP: $5.20Now: $4.68Was: $5.20Subtotal: -
On Sale
COMETIC Starter Housing O-Ring Pack C9433
COMETIC
Now: $4.77Was: $5.30A leaking starter housing can compromise engine reliability and create costly downtime in the garage or on the track. COMETIC's O-ring pack delivers OEM-spec sealing with the durability to handle...09350179- SKU:
- 09350179
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
- RIDING STYLE:
- STREET
- APPLICATION:
- STARTER HOUSING
- MATERIAL:
- NITRILE RUBBER
Now: $4.77Was: $5.30 -
On Sale
COMETIC Starter Shaft Seal C9379
COMETIC
Now: $13.32Was: $14.80A leaking starter shaft seal compromises engine oil integrity and increases the risk of costly internal damage. The COMETIC C9379 Starter Shaft Seal delivers OEM-quality sealing performance with...09350181- SKU:
- 09350181
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- STARTER SHAFT
- UNITS:
- 5 PACK
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
Now: $13.32Was: $14.80 -
On Sale
COMETIC Starter Shaft Seal C9509
COMETIC
Now: $15.21Was: $16.90A failing starter shaft seal compromises engine reliability and creates potential oil leakage at a critical junction. The COMETIC C9509 delivers precision sealing that prevents costly internal damage...09350182- SKU:
- 09350182
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- STARTER SHAFT
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
- MATERIAL:
- DUAL LIP VITON
- RIDING STYLE:
- STREET
Now: $15.21Was: $16.90Qty in Cart: 0Quantity:Price:Now: $15.21Was: $16.90Subtotal: -
On Sale
COMETIC Drain Plug Washer C9498
COMETIC
Now: $6.03Was: $6.70A worn or degraded drain plug washer is an often-overlooked source of slow oil leaks that compound maintenance headaches over time. The COMETIC C9498 eliminates this vulnerability with a premium,...09350185- SKU:
- 09350185
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- NYLON
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,063'
- THICKNESS IMPERIAL:
- 0.063'
- UNITS:
- 10 PACK
- APPLICATION:
- DRAIN PLUG
- PRODUCT NAME:
- WASHER
Now: $6.03Was: $6.70 -
On Sale
COMETIC Counter Shaft O-Ring C9529
COMETIC
Now: $5.76Was: $6.40Counter shaft seals are critical to maintaining proper engine pressurization and preventing fuel leakage in high-performance applications. The COMETIC C9529 O-Ring is engineered from premium,...09350187- SKU:
- 09350187
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- APPLICATION:
- COUNTERSHAFT
- MATERIAL:
- BUNA RUBBER
Now: $5.76Was: $6.40
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Engine Seals, O-Rings, and Kits
- Compatibility: Ensure seals and O-rings match your Harley's engine type (e.g., Big Twin, Twin Cam, Evo) and model specifics (e.g., FL/FLH, XL, Softail). Use the vehicle selector for year-specific fits (e.g., 1973-1983 for fork seals, 1990-up for drive gear seals) to prevent leaks or fit issues.
- Type of Use: For high-temperature or oil-exposed areas, opt for Viton seals for superior resistance; standard rebuilds benefit from nitrile or silicone O-rings for reliable sealing in street riding conditions.
- Components and Upgrades: Select individual seals (e.g., sprocket shaft, shifter lever) or packs (5-10 units); upgrade to fuel-resistant kits for comprehensive overhauls. Focus on materials that won't crack or become brittle.
- Brand and Quality: Choose James Gasket for top-quality seals like drive gear or solenoid types, or Cometic for premium Viton/silicone/nitrile options. Prioritize USA-made materials for durability and fuel resistance.
- Installation and Cost: Seals are straightforward replacements for DIY maintenance; prices range from $3.95 for individual seals to $35.95 for kits—factor in pack sizes (e.g., 5-10) and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models and engines do these seals and O-rings support? Parts support Big Twin, Evo, Twin Cam, and models like FL/FLH, XL, Softail—use the year/make/model filter for compatibility, including specific applications like oil pump or fork seals.
- How do Viton seals improve performance? Viton offers high-temp and oil resistance, preventing leaks in critical areas like sprocket shafts or pushrod covers for reliable engine operation.
- What materials are used in seals and O-rings? Common materials include Viton (for oil/cranks), Nitrile Rubber (neutral switch), Silicone (rocker breather), ensuring fuel resistance without cracking.
- Are these sold in packs or individually? Many are in packs (5-10 units) for convenience in rebuilds; some like fork seal kits include everything needed for installation.
- What if a part doesn't fit my Harley? Verify application (e.g., shifter shaft, fuel filter) and year before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related engine parts? Yes—explore gaskets, pistons, or full rebuild kits in the Harley engine category to complement your seals and O-rings for a complete overhaul.
