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 Main Drive Gear Seal 35230-39DL
JAMES GASKET
$9.95A failing main drive gear seal is a silent killer—it allows oil to seep past the shaft, leading to inadequate lubrication, gear wear, and catastrophic drivetrain failure. The JAMES GASKET Main Drive...DS174538- SKU:
- DS174538
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
$9.95 -
JAMES GASKET Rubber Pushrod Kit - Big Twin 17955-48-FLR
JAMES GASKET
$13.95A cam change or engine rebuild demands precision—using mismatched or worn pushrod seals compromises oil containment and engine reliability. The JAMES GASKET Rubber Pushrod Kit eliminates guesswork by...DS174536- SKU:
- DS174536
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- APPLICATION:
- PUSHROD COVER
- MATERIAL:
- RUBBER
$13.95 -
JAMES GASKET Large Pushrod Rubber 17955-48-A
JAMES GASKET
$82.30Pushrod sealing integrity directly impacts your engine's oil pressure and performance consistency. A worn or damaged pushrod rubber compromises gasket effectiveness, leading to leaks that can degrade...DS174535- SKU:
- DS174535
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- PUSHROD COVER
- RIDING STYLE:
- STREET
- UNITS:
- 100 PACK
$82.30 -
JAMES GASKET Oil Tank Line Seal - XLH 63529-50
JAMES GASKET
$24.40Oil tank line seals are critical to preventing leaks that compromise both performance and engine cleanliness on XLH models. A degraded or missing seal allows oil seepage into the crankcase breather...DS174525- SKU:
- DS174525
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- OIL LINE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
$24.40 -
JAMES GASKET Oil Line Feed Tube Rubber Seal 63525-92
JAMES GASKET
$26.10A compromised oil line seal can lead to costly leaks, reduced system pressure, and potential engine damage—making a quality replacement essential for any serious build or maintenance routine. The...DS174524- SKU:
- DS174524
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- OIL LINE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
$26.10 -
JAMES GASKET Gas Cap O-Ring 61109-85-C
JAMES GASKET
$28.50A degraded gas cap seal compromises fuel system integrity and invites fuel vapor leaks that can trigger check engine lights and failed emissions tests. The JAMES GASKET Gas Cap O-Ring restores a...DS174515- SKU:
- DS174515
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- FUEL CAP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- O-RING
$28.50 -
JAMES GASKET Shifter Shaft Seal 11148
JAMES GASKET
$19.81A leaking shifter shaft seal compromises your transmission's integrity and can lead to costly fluid loss and internal damage. The JAMES GASKET Shifter Shaft Seal 11148 delivers OEM-grade sealing...DS174489- SKU:
- DS174489
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- GEAR SHIFT LEVER
- TYPE:
- QUAD SEAL
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- X-RING
- UNITS:
- 25 PACK
$19.81 -
JAMES GASKET Starter Shaft Oil Seal - Big Twin 31341-80DL
JAMES GASKET
$14.50The starter shaft oil seal is a critical component that prevents oil leakage from your Big Twin engine's crankcase—a common failure point that can lead to messy garage floors and potential engine...DS174486- SKU:
- DS174486
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- APPLICATION:
- STARTER SHAFT
- UNITS:
- 5 PACK
$14.50 -
JAMES GASKET Kick Shaft Oil Seal - XL/Big Twin 33076-37
JAMES GASKET
$11.80A failing crankshaft oil seal is a silent threat to your engine's longevity—once it starts weeping, internal lubrication fails and bearing damage accelerates. The JAMES GASKET Kick Shaft Oil Seal is...DS174478- SKU:
- DS174478
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- APPLICATION:
- CRANKSHAFT
- APPLICATION:
- KICKSTARTER
- RIDING STYLE:
- STREET
$11.80 -
JAMES GASKET Shifter Cam Shaft Seal 34036-36
JAMES GASKET
$11.10A leaking shifter cam shaft seal compromises transmission reliability and creates costly fluid loss on the track and street. The JAMES GASKET Shifter Cam Shaft Seal 34036-36 delivers OEM-quality...DS174477- SKU:
- DS174477
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- APPLICATION:
- SHIFTER SHAFT
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
$11.10 -
JAMES GASKET Mainshaft Seal - Big Twin 12044-A
JAMES GASKET
$14.95The mainshaft seal is a critical component that prevents transmission fluid from leaking into your primary case, a common failure point on Big Twin engines. A worn or degraded seal will cause oil...DS174476- SKU:
- DS174476
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
- APPLICATION:
- MAIN DRIVE GEAR
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
$14.95 -
JAMES GASKET Main Drive Gear Seal 12013-A
JAMES GASKET
$9.50A leaking main drive gear seal can compromise your entire drivetrain, allowing oil loss and contamination that degrades performance and shortens component life. The JAMES GASKET Main Drive Gear Seal...DS174475- SKU:
- DS174475
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- APPLICATION:
- MAIN DRIVE GEAR
- APPLICATION:
- MAINSHAFT
$9.50 -
JAMES GASKET Pushrod Cork - Big Twin 37337-36
JAMES GASKET
$24.40A worn or failing pushrod cork gasket compromises engine sealing and can lead to oil leakage, increased blowby, and potential internal damage. JAMES GASKET's pushrod cork delivers reliable sealing...DS174474- SKU:
- DS174474
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- CLUTCH PUSHROD
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
$24.40 -
JAMES GASKET Oil Seal for Supernut 35211-85-DL
JAMES GASKET
$24.70Transmission fluid leaks compromise performance and accelerate internal wear—a quality oil seal is your first line of defense. The JAMES GASKET Oil Seal for Supernut is engineered to maintain a...DS174458- SKU:
- DS174458
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- STYLE:
- 4-SPEED
- PRODUCT NAME:
- SEAL
- TYPE:
- SUPER NUT
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$24.70 -
JAMES GASKET Trans Mainshaft Seal Kit - 4 Speed 37741-67-K
JAMES GASKET
$24.95Transmission seal degradation is one of the most common sources of fluid leaks on Big Twin engines, leading to costly damage if left unaddressed. The JAMES GASKET Trans Mainshaft Seal Kit gives you...DS174456- SKU:
- DS174456
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- TRANSMISSION
- STYLE:
- 4-SPEED
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$24.95 -
JAMES GASKET Main Drive Gear Double Lip Seal 37741-82DL
JAMES GASKET
$13.95A worn main drive gear seal is an open invitation to oil leakage, reduced efficiency, and potential drivetrain damage. The JAMES GASKET Double Lip Seal 37741-82DL delivers OEM-grade sealing...DS174455- SKU:
- DS174455
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- MAIN DRIVE GEAR
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$13.95 -
JAMES GASKET Shift Fork Shaft - Big Twin 34036-80
JAMES GASKET
$7.80A worn or damaged shift fork shaft compromises your transmission's reliability and shifts—exactly what you can't afford during competition or spirited riding. The JAMES GASKET Shift Fork Shaft is...DS174454- SKU:
- DS174454
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- TYPE:
- SHIFTER SHAFT
- UNITS:
- 10 PACK
$7.80Qty in Cart: 0Quantity:Price:$7.80Subtotal: -
JAMES GASKET Float Bowl O-Ring - XL,F 27889-78
JAMES GASKET
$21.00A properly sealed float bowl is critical to consistent fuel delivery and carburetor performance—any leak or degradation directly impacts your engine's tuning stability and fuel economy. The JAMES...DS174448- SKU:
- DS174448
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- FLOAT BOWL
- PRODUCT NAME:
- O-RING
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- APPLICATION:
- CARBURETOR
$21.00 -
JAMES GASKET Magneto Plate Oil Seal - XLCH 12023
JAMES GASKET
$22.10The magneto plate oil seal is a critical component that prevents crankcase oil from leaking past your ignition system—a common failure point on vintage Harley engines. A compromised seal forces you...DS174421- SKU:
- DS174421
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
- APPLICATION:
- MAGNETO MOUNTING
- APPLICATION:
- PUSHROD COVER
$22.10 -
JAMES GASKET Rocker Cover Seal 17475-38
JAMES GASKET
$23.70A failing rocker cover seal leads to oil seepage, engine bay contamination, and potential internal damage that compounds over time. The JAMES GASKET Rocker Cover Seal 17475-38 delivers reliable,...DS174414- SKU:
- DS174414
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- ROCKER COVER
- PRODUCT NAME:
- SEAL
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$23.70
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.
