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 Crank Sensor O-Ring C9667
COMETIC
MSRP: $2.95Now: $2.88Was: $3.20Crank sensor O-rings fail silently, causing misfires, rough idle, and limp-mode diagnostics that waste hours of troubleshooting. The COMETIC C9667 replaces worn seals with a fuel-resistant design...09350153- SKU:
- 09350153
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- APPLICATION:
- CRANKSHAFT POSITION SENSOR
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
MSRP: $2.95Now: $2.88Was: $3.20Qty in Cart: 0Quantity:Price:MSRP: $2.95Now: $2.88Was: $3.20Subtotal: -
On Sale
COMETIC Case Dowel O-Ring C9287
COMETIC
Now: $8.55Was: $9.50Engine case dowel o-rings are critical sealing components that prevent oil weeping and maintain precise case alignment—failure here compromises both performance and engine longevity. The COMETIC...09350152- SKU:
- 09350152
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- ENGINE CASE DOWEL
- UNITS:
- 10 PACK
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
Now: $8.55Was: $9.50 -
On Sale
COMETIC Base Dowel O-Ring C9438
COMETIC
Now: $4.77Was: $5.30Proper base dowel sealing is critical to maintaining compression and preventing oil weeping at the block interface—especially under high boost or sustained RPM. The COMETIC Base Dowel O-Ring C9438...09350151- SKU:
- 09350151
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- ENGINE CASE DOWEL
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
Now: $4.77Was: $5.30 -
On Sale
COMETIC O-Ring C9292
COMETIC
Now: $14.58Was: $16.20Cometic O-Ring gaskets are engineered for critical sealing applications where leakage means lost performance and costly downtime. Whether you're building a high-boost engine or maintaining precision...09350149- SKU:
- 09350149
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- UPPER PUSHROD
- UNITS:
- 25 PACK
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
Now: $14.58Was: $16.20 -
On Sale
COMETIC Rocker Umbrella Seal C9633
COMETIC
Now: $27.99Was: $31.10Rocker cover seals take a beating from engine heat, oil exposure, and constant thermal cycling—premature failure means oil leaks, contamination, and potential engine bay damage. The COMETIC Rocker...09350146- SKU:
- 09350146
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- ROCKER COVER
- APPLICATION:
- UMBRELLA VALVE
- MATERIAL:
- VITON
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
Now: $27.99Was: $31.10Qty in Cart: 0Quantity:Price:Now: $27.99Was: $31.10Subtotal: -
On Sale
COMETIC Pushrod Tube O-Ring C9711-4
COMETIC
MSRP: $3.95Now: $3.56Was: $3.95Pushrod tube seals are critical to maintaining oil pressure and preventing leaks in high-performance engines—especially under sustained boost or sustained RPM. The COMETIC C9711-4 uses a...09344723- SKU:
- 09344723
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- O-RING
- APPLICATION:
- PUSHROD COVER
- MATERIAL:
- NITRILE RUBBER
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
MSRP: $3.95Now: $3.56Was: $3.95Qty in Cart: 0Quantity:Price:MSRP: $3.95Now: $3.56Was: $3.95Subtotal: -
On Sale
COMETIC Shift Lever O-Ring C9661
COMETIC
MSRP: $4.15Now: $3.74Was: $4.15Shift lever O-rings are critical sealing components that prevent fluid leakage and maintain consistent shifter performance under racing conditions. The COMETIC C9661 is engineered from premium,...09341374- SKU:
- 09341374
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
- APPLICATION:
- SHIFTER SHAFT
- RIDING STYLE:
- STREET
MSRP: $4.15Now: $3.74Was: $4.15 -
On Sale
COMETIC Wet Clutch Seal C9260
COMETIC
Now: $8.55Was: $9.50Wet clutch seals are critical to maintaining hydraulic integrity and preventing fluid loss in your transmission or engine case. A failed or degraded seal compromises performance, increases...09350162- SKU:
- 09350162
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- INNER PRIMARY
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
Now: $8.55Was: $9.50 -
On Sale
S&S CYCLE Oil Pump O-Ring Kit - Twin Cam 500-0326
S&S CYCLE
MSRP: $11.95Now: $10.99Was: $11.95Oil pump o-ring degradation is a common failure point in Twin Cam engines, leading to loss of oil pressure, internal leaks, and potential engine damage. The S&S Cycle Oil Pump O-Ring Kit provides...09351015- SKU:
- 09351015
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- UNITS:
- KIT
- APPLICATION:
- OIL PUMP
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL
MSRP: $11.95Now: $10.99Was: $11.95
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.
