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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COMETIC Crank Sensor O-Ring C9667
COMETIC
$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 that maintains compression integrity and eliminates sensor...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
$3.20 -
COMETIC Case Dowel O-Ring C9287
COMETIC
$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 C9287 is engineered with premium, fuel-resistant elastomer...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
$9.50 -
COMETIC Base Dowel O-Ring C9438
COMETIC
$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 delivers the fuel-resistant elastomer durability you need...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
$5.30 -
COMETIC O-Ring C9292
COMETIC
$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 fuel system components, this O-ring delivers dependable...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
$16.20 -
COMETIC Rocker Umbrella Seal C9633
COMETIC
$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 Umbrella Seal C9633 eliminates this weak point with...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
$31.10 -
COMETIC Pushrod Tube O-Ring C9711-4
COMETIC
$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 precision-engineered Viton® gasket design that resists fuel...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
$3.95Qty in Cart: 0Quantity:Price:$3.95Subtotal: -
COMETIC Shift Lever O-Ring C9661
COMETIC
$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, fuel-resistant elastomer that resists degradation from heat...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
$4.15 -
COMETIC Wet Clutch Seal C9260
COMETIC
$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 maintenance costs, and risks catastrophic damage. The COMETIC...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
$9.50 -
On Sale
S&S CYCLE Oil Pump O-Ring Kit - Twin Cam 500-0326
S&S CYCLE
MSRP: $11.95Now: $10.76Was: $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 OEM-quality replacement seals that restore proper oil...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: $10.76Was: $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.
