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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JAMES GASKET Neutral Sensor O-Ring - Twin Cam 11290
JAMES GASKET
$15.70A worn or deteriorated neutral sensor O-ring can cause erratic neutral position reading, leading to shifting issues and potential transmission problems. This OEM-quality replacement from JAMES GASKET ensures a proper seal at the neutral sensor, restoring...DS173207- SKU:
- DS173207
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$15.70 -
JAMES GASKET Crank Sensor O-Ring - Twin Cam 11289
JAMES GASKET
$3.90A failing crank sensor o-ring compromises engine timing accuracy and fuel delivery precision, leading to rough idle, poor fuel economy, and potential ignition misfires. The JAMES GASKET Crank Sensor O-Ring is engineered to maintain a perfect seal on your...DS173206- SKU:
- DS173206
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- APPLICATION:
- CAM POSITION SENSOR
- UNITS:
- 10 PACK
$3.90 -
JAMES GASKET Cam Position Sensor O-Ring 11288
JAMES GASKET
$9.00A worn or degraded cam position sensor O-ring compromises engine timing accuracy and can trigger diagnostic trouble codes that affect performance and fuel economy. This genuine JAMES GASKET replacement ensures a reliable seal that maintains proper sensor...DS173205- SKU:
- DS173205
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- O-RING
- APPLICATION:
- CAM POSITION SENSOR
$9.00Qty in Cart: 0Quantity:Price:$9.00Subtotal: -
JAMES GASKET Case Dowel O-Ring - Twin Cam 11273
JAMES GASKET
$4.00A leaking gasket case dowel compromises engine sealing and invites oil seepage that degrades performance and reliability. The JAMES GASKET Case Dowel O-Ring provides a precision seal at the critical interface where your Twin Cam crankcase meets its...DS173203- SKU:
- DS173203
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- CYLINDER HEAD
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- RUBBER
- TYPE:
- DOWEL
- PRODUCT NAME:
- O-RING
$4.00 -
JAMES GASKET Rocker Arm Support O-Ring - Twin Cam 11270
JAMES GASKET
$6.30Rocker arm sealing failures can lead to oil leaks, increased wear, and costly engine damage—especially in high-performance Twin Cam applications where precision matters. The JAMES GASKET Rocker Arm Support O-Ring is engineered to maintain a reliable seal...DS173202- SKU:
- DS173202
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- CYLINDER HEAD
- APPLICATION:
- LOWER ROCKER COVER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- TYPE:
- SUPPORT
- UNITS:
- 10 PACK
$6.30 -
JAMES GASKET Cylinder Base O-Ring - Twin Cam 11256
JAMES GASKET
$20.10A leaking cylinder base gasket compromises engine seal integrity and can lead to oil seepage, reduced performance, and costly engine damage. The JAMES GASKET Cylinder Base O-Ring is engineered to maintain a reliable, leak-free seal on Twin Cam...DS173201- SKU:
- DS173201
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- APPLICATION:
- CYLINDER
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- O-RING
- APPLICATION:
- CRANKCASE
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- 10 PACK
$20.10 -
COMETIC Derby O-Ring C9442
COMETIC
$13.70Seal integrity is everything when you're pushing your engine to the limit. The COMETIC Derby O-Ring C9442 delivers the durability and chemical resistance your high-performance application demands, eliminating the risk of fuel degradation that can...DS172019- SKU:
- DS172019
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- NITRILE RUBBER
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
- RIDING STYLE:
- STREET
- APPLICATION:
- DERBY COVER
$13.70 -
JAMES GASKET Mainshaft Seal - XL 35169-52
JAMES GASKET
$15.60A leaking mainshaft seal compromises transmission efficiency and creates messy fluid loss that signals deeper drivetrain problems. The JAMES GASKET Mainshaft Seal XL 35169-52 delivers OEM-equivalent sealing performance with precision manufacturing that...78081033- SKU:
- 78081033
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
$15.60 -
JAMES GASKET Oil Seal Retainer Kit - XL 35150-52
JAMES GASKET
$12.95Oil seal retainers are critical for preventing costly leaks and maintaining consistent pressure throughout your engine's lubrication system. The JAMES GASKET Oil Seal Retainer Kit XL 35150-52 delivers OEM-equivalent performance with precision engineering...78081032- SKU:
- 78081032
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- SPROCKET SHAFT
- RIDING STYLE:
- STREET
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
$12.95 -
On Sale
JAMES GASKET Piston Liner O-Ring - 4 Pack ST-11900027
JAMES GASKET
MSRP: $20.95Now: $13.00Was: $20.95Piston liner O-rings are critical sealing components that prevent fluid leakage and maintain pressure integrity in high-performance engine applications. A compromised O-ring can lead to loss of boost pressure, coolant seepage, or oil bypass—all of which...09351071- SKU:
- 09351071
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- PISTON
- PRODUCT NAME:
- O-RING
- TYPE:
- PISTON LINER
- UNITS:
- KIT
MSRP: $20.95Now: $13.00Was: $20.95 -
JAMES GASKET Breather O-Ring - M8 JGI-11900116
JAMES GASKET
$13.10A properly sealed breather system is critical for maintaining crankcase pressure and preventing oil leakage in high-performance engines. This James Gasket O-Ring ensures a reliable, leak-free seal at the breather connection point, eliminating the risk of...09350985- SKU:
- 09350985
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- O-RING
- MATERIAL:
- RUBBER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$13.10 -
JAMES GASKET Sprocket Shaft Seal JGI-11000134
JAMES GASKET
$15.40A compromised sprocket shaft seal is a direct path to oil leakage, internal contamination, and premature drivetrain wear. The JAMES GASKET Sprocket Shaft Seal JGI-11000134 delivers OEM-grade sealing performance to keep oil where it belongs—inside your...09350984- SKU:
- 09350984
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- SPROCKET SHAFT
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$15.40 -
JAMES GASKET Engine Inner Primary Seal JGI-25600455
JAMES GASKET
$24.95An engine's inner primary seal is critical to preventing oil seepage that can compromise performance and create messy maintenance headaches. The JAMES GASKET Engine Inner Primary Seal JGI-25600455 delivers reliable, long-lasting sealing with precision...09350983- SKU:
- 09350983
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- APPLICATION:
- INNER PRIMARY
- UNITS:
- EACH
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
$24.95 -
JAMES GASKET Engine to Trans Seal - M8 JGI-24400215
JAMES GASKET
$13.95A leaking engine-to-transmission seal can silently compromise your entire drivetrain, causing fluid loss, contamination, and catastrophic failure. The JAMES GASKET M8 seal delivers OEM-grade reliability with precision manufacturing, keeping your power...09350982- SKU:
- 09350982
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- ENGINE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$13.95 -
JAMES GASKET Shifter Shaft Seal - M8 JGI-11000101
JAMES GASKET
$7.95A leaking shifter shaft seal compromises transmission fluid integrity and can lead to costly internal damage. The JAMES GASKET Shifter Shaft Seal M8 is engineered to eliminate seepage and maintain consistent hydraulic pressure, keeping your transmission...09350981- SKU:
- 09350981
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- SHIFTER SHAFT
- UNITS:
- EACH
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
$7.95 -
JAMES GASKET Intake Manifold Seal - M8 JGI-27300087
JAMES GASKET
$18.00An intake manifold seal that fails will compromise your engine's air-fuel mixture and create vacuum leaks that tank performance and fuel economy. The JAMES GASKET M8 intake manifold seal is precision-engineered to maintain a reliable, repeatable seal...09350980- SKU:
- 09350980
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- INTAKE MANIFOLD
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$18.00 -
JAMES GASKET Valve Stem Seal - M8 JGI-18100044
JAMES GASKET
$7.80Valve stem seals are critical to preventing oil from leaking into your combustion chambers—a problem that causes blue smoke, fouled plugs, and lost compression. The JAMES GASKET M8 delivers OEM-grade sealing reliability with U.S.A. manufacturing...09350979- SKU:
- 09350979
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- TYPE:
- VALVE STEM
- PRODUCT NAME:
- SEAL
- UNITS:
- 8 PACK
$7.80 -
JAMES GASKET Cylinder Rocker Seal - M8 JGI-25700425
JAMES GASKET
$29.40Cylinder rocker seals are critical to maintaining oil containment and preventing leaks that compromise engine performance and longevity. A degraded or failed rocker seal allows oil to escape, reducing lubrication efficiency and creating mess under the...09350978- SKU:
- 09350978
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- APPLICATION:
- ROCKER COVER
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$29.40 -
COMETIC Module Kit O-Ring C10200
COMETIC
$8.35Precision sealing is non-negotiable in high-performance racing applications, and compromised gaskets mean lost boost, inconsistent fueling, and catastrophic engine damage. The COMETIC Module Kit O-Ring C10200 delivers the reliability demanded by...09350977- SKU:
- 09350977
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INDUCTION MODULE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- UNITS:
- 4 PACK
$8.35 -
COMETIC Drive Gear Seal - 5 Pack C9514
COMETIC
$24.20Drive gear seals are critical to maintaining proper fluid retention and preventing contamination in your differential or transmission housing. A failed seal can result in oil weeping, fluid loss, and catastrophic internal damage—making preventative...09350213- SKU:
- 09350213
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
$24.20
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.
