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 Right Mainshaft O-Ring C9495
COMETIC
Now: $4.77Was: $5.30A compromised mainshaft seal is a fast track to fluid leakage and catastrophic drivetrain failure. The COMETIC Right Mainshaft O-Ring (C9495) replaces worn or damaged seals with a...09350188- SKU:
- 09350188
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- 25 PACK
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- APPLICATION:
- TRANSMISSION
Now: $4.77Was: $5.30Qty in Cart: 0Quantity:Price:Now: $4.77Was: $5.30Subtotal: -
On Sale
COMETIC Mainshaft Quad Seal C9361
COMETIC
Now: $9.54Was: $10.60Mainshaft seals are critical to preventing internal transmission fluid leakage and maintaining hydraulic pressure—especially under high-performance driving conditions where vibration and heat...09350189- SKU:
- 09350189
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- APPLICATION:
- TRANSMISSION
Now: $9.54Was: $10.60Qty in Cart: 0Quantity:Price:Now: $9.54Was: $10.60Subtotal: -
On Sale
COMETIC Filler Plug O-Ring C9263
COMETIC
MSRP: $4.15Now: $3.78Was: $4.20A leaking filler plug can compromise your entire cooling system's integrity and lead to catastrophic engine damage. The COMETIC Filler Plug O-Ring C9263 delivers a reliable, OEM-quality seal that...09350191- SKU:
- 09350191
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- APPLICATION:
- FILLER PLUG
MSRP: $4.15Now: $3.78Was: $4.20 -
On Sale
COMETIC Clutch Cable O-Ring C9447
COMETIC
MSRP: $2.95Now: $2.88Was: $3.20A worn or degraded clutch cable O-ring compromises shift precision and can lead to cable binding or premature failure—especially under sustained track conditions. The COMETIC C9447 replaces that...09350192- SKU:
- 09350192
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- VITON
- APPLICATION:
- CLUTCH CABLE
- RIDING STYLE:
- STREET
- 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 Tappet Screw O-Ring C9448
COMETIC
MSRP: $4.15Now: $3.78Was: $4.20Valve cover gasket leaks are a common culprit behind oil seepage and engine bay mess. The COMETIC Tappet Screw O-Ring (C9448) provides a precision seal at the critical junction where fasteners pass...09350225- SKU:
- 09350225
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- APPLICATION:
- TAPPET GUIDE
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
MSRP: $4.15Now: $3.78Was: $4.20 -
On Sale
COMETIC Upper Tappet Block O-Ring C9443
COMETIC
Now: $7.56Was: $8.40The upper tappet block o-ring is a critical seal in your engine's valve train system—when it fails, oil leakage and compromised cylinder head pressure follow immediately. Cometic's C9443 is...09350226- SKU:
- 09350226
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- APPLICATION:
- UPPER TAPPET BLOCK
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
Now: $7.56Was: $8.40Qty in Cart: 0Quantity:Price:Now: $7.56Was: $8.40Subtotal: -
On Sale
COMETIC Lower Pushrod O-Ring C9295
COMETIC
Now: $12.69Was: $14.10Pushrod sealing integrity is critical to maintaining proper oil pressure and preventing catastrophic engine leakage. The COMETIC Lower Pushrod O-Ring C9295 delivers the precision engineering and...09350228- SKU:
- 09350228
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- NITRILE RUBBER
- UNITS:
- 10 PACK
- APPLICATION:
- PUSHROD COVER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
Now: $12.69Was: $14.10Qty in Cart: 0Quantity:Price:Now: $12.69Was: $14.10Subtotal: -
On Sale
COMETIC Tappet Pin Cover O-Ring C9296
COMETIC
MSRP: $3.95Now: $3.56Was: $3.95A failing tappet pin cover O-ring will compromise your engine's seal integrity and lead to oil leakage that degrades performance and creates messy maintenance headaches. The COMETIC C9296 delivers...09350229- SKU:
- 09350229
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- TAPPET COVER
- MATERIAL:
- NITRILE
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
MSRP: $3.95Now: $3.56Was: $3.95 -
On Sale
COMETIC Point Cover Seal C9355
COMETIC
Now: $7.38Was: $8.20A failing point cover seal leads to oil leaks, contamination of ignition components, and potential engine damage—problems that compound quickly on the track or in the shop. The COMETIC C9355...09350230- SKU:
- 09350230
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- UNITS:
- 5 PACK
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- APPLICATION:
- CAM COVER
- PRODUCT NAME:
- SEAL
Now: $7.38Was: $8.20 -
On Sale
COMETIC Inspection Cover O-Ring C9439
COMETIC
Now: $5.76Was: $6.40Inspection cover o-rings are critical sealing components that prevent oil leakage and contamination in high-performance engines. The COMETIC C9439 is engineered with fuel-resistant materials that...09350232- SKU:
- 09350232
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- APPLICATION:
- CHAIN INSPECTION COVER
- UNITS:
- 10 PACK
- MATERIAL:
- NITRILE RUBBER
Now: $5.76Was: $6.40Qty in Cart: 0Quantity:Price:Now: $5.76Was: $6.40Subtotal: -
On Sale
COMETIC Motor Sprocket Seal C9353
COMETIC
Now: $15.48Was: $17.20A failing sprocket seal allows oil to migrate past your crankshaft, leading to contamination, reduced bearing protection, and potential catastrophic engine failure. The COMETIC Motor Sprocket Seal...09350234- SKU:
- 09350234
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- SEAL
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- 5 PACK
Now: $15.48Was: $17.20 -
On Sale
COMETIC Coolant Tube O-Ring Set C10139
COMETIC
MSRP: $31.45Now: $28.31Was: $31.45Proper O-ring seals are critical to preventing coolant leaks and maintaining system integrity during cylinder head service. The COMETIC C10139 O-ring set eliminates guesswork by providing all...09344838- SKU:
- 09344838
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- O-RING
- UNITS:
- KIT
- APPLICATION:
- COOLANT TUBE
- RIDING STYLE:
- STREET
MSRP: $31.45Now: $28.31Was: $31.45Qty in Cart: 0Quantity:Price:MSRP: $31.45Now: $28.31Was: $31.45Subtotal: -
On Sale
COMETIC O-Ring C9445
COMETIC
Now: $4.77Was: $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
Now: $4.77Was: $5.30 -
On Sale
COMETIC Valve Stem Seal - .625" C9998-1
COMETIC
MSRP: $4.95Now: $4.46Was: $4.95Valve stem seals are critical to preventing oil from seeping into your combustion chamber—a problem that degrades performance, increases emissions, and accelerates engine wear. The COMETIC C9998-1...09344726- SKU:
- 09344726
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- TYPE:
- VALVE STEM
- UNITS:
- EACH
MSRP: $4.95Now: $4.46Was: $4.95 -
On Sale
COMETIC Shift Sleeve O-Ring C9484
COMETIC
Now: $8.55Was: $9.50Shift sleeve o-rings endure extreme heat, pressure, and fuel exposure during performance driving—and failure means transmission fluid leakage, loss of shift precision, and costly downtime. The...09341372- SKU:
- 09341372
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- UNITS:
- 25 PACK
- PRODUCT NAME:
- O-RING
- APPLICATION:
- SHIFTER LEVER
Now: $8.55Was: $9.50 -
On Sale
COMETIC Double Lip Seal C9350
COMETIC
Now: $13.32Was: $14.80A quality crankshaft seal is the difference between a clean engine bay and catastrophic oil leakage under sustained load. The COMETIC Double Lip Seal C9350 delivers the reliability you need for...09350171- SKU:
- 09350171
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- APPLICATION:
- CAM COVER
- PRODUCT NAME:
- SEAL
Now: $13.32Was: $14.80 -
On Sale
COMETIC O-Ring C10201
COMETIC
Now: $10.71Was: $11.90Proper sealing is non-negotiable in high-performance engine builds, and a compromised O-ring can lead to costly leaks and catastrophic failures. The COMETIC C10201 delivers reliable, precision...09350990- SKU:
- 09350990
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- O-RING
- APPLICATION:
- CYLINDER
- RIDING STYLE:
- ATV
- UNITS:
- 10 PACK
Now: $10.71Was: $11.90 -
On Sale
COMETIC Primary Seal Kit C10248
COMETIC
MSRP: $86.05Now: $77.45Was: $86.05A primary seal kit is the foundation of a leak-free, reliable engine—and Cometic's AFM gasket material sets the standard for high-performance applications. Whether you're running a street engine or a...09351031- SKU:
- 09351031
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- SEAL
- UNITS:
- KIT
- TYPE:
- PRIMARY
MSRP: $86.05Now: $77.45Was: $86.05Qty in Cart: 0Quantity:Price:MSRP: $86.05Now: $77.45Was: $86.05Subtotal: -
On Sale
COMETIC Dip Stick O-Ring - Sportster C9961
COMETIC
MSRP: $2.95Now: $2.88Was: $3.20Oil level monitoring depends on a reliable seal, and a degraded dip stick O-ring compromises both accuracy and engine cleanliness. COMETIC's fuel-resistant O-ring maintains its integrity under...09340740- SKU:
- 09340740
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- DIPSTICK
- MATERIAL:
- BUNA
- PRODUCT NAME:
- O-RING
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
MSRP: $2.95Now: $2.88Was: $3.20 -
On Sale
COMETIC Lower Pushrod Tube Seal C9461
COMETIC
Now: $6.66Was: $7.40Pushrod tube seals are critical to preventing oil leakage and maintaining proper lubrication in high-performance engines—failure here can lead to catastrophic damage under racing conditions. The...09350259- SKU:
- 09350259
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- PUSHROD COVER
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- X-RING
- RIDING STYLE:
- STREET
- TYPE:
- QUAD SEAL
- UNITS:
- 10 PACK
Now: $6.66Was: $7.40
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.
