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Start ShoppingCOMETIC C9490F MLS Transmission Gasket for Evo Big Twin - High-Performance Sealing Solution
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Description
Upgrade your Evo Big Twin's transmission system with this precision-engineered COMETIC C9490F gasket. Designed for 5-speed main drive gear bearing retainers, this MLS gasket delivers superior sealing performance to prevent leaks and ensure smooth gear operation.
Key Features
- Multi-Layer Steel (MLS) Construction: Durable, heat-resistant material withstands extreme engine temperatures and pressure for long-term reliability.
- Silicone Beading: Reinforced sealing edges prevent fluid leakage and maintain optimal transmission efficiency.
- 0.030" Thickness: Precise dimensional specifications ensure perfect fitment and proper compression for leak-free performance.
- 5-Speed Big Twin Compatibility: Specifically engineered for Harley-Davidson Evo Big Twin transmissions with main drive gear bearing retainers.
Why Choose This Product
Enhance your motorcycle's reliability with a gasket that combines heavy-duty materials with precise engineering. The COMETIC C9490F's MLS design reduces maintenance intervals and prevents costly transmission failures. Its lightweight construction (0.1 lbs) simplifies installation while maintaining structural integrity under high-stress conditions. This gasket is essential for riders seeking maximum performance and durability in their Big Twin transmissions.
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Upgrade your Evo Big Twin's transmission system with this precision-engineered COMETIC C9490F gasket. Designed for 5-speed main drive gear bearing retainers, this MLS gasket delivers superior sealing performance to prevent leaks and ensure smooth gear operation.
Key Features
- Multi-Layer Steel (MLS) Construction: Durable, heat-resistant material withstands extreme engine temperatures and pressure for long-term reliability.
- Silicone Beading: Reinforced sealing edges prevent fluid leakage and maintain optimal transmission efficiency.
- 0.030" Thickness: Precise dimensional specifications ensure perfect fitment and proper compression for leak-free performance.
- 5-Speed Big Twin Compatibility: Specifically engineered for Harley-Davidson Evo Big Twin transmissions with main drive gear bearing retainers.
Why Choose This Product
Enhance your motorcycle's reliability with a gasket that combines heavy-duty materials with precise engineering. The COMETIC C9490F's MLS design reduces maintenance intervals and prevents costly transmission failures. Its lightweight construction (0.1 lbs) simplifies installation while maintaining structural integrity under high-stress conditions. This gasket is essential for riders seeking maximum performance and durability in their Big Twin transmissions.| SKU | GM3549AF37 |
|---|---|
| MPN | C9490F |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | FX/FXWG/FXSB/FXR/FLH/FLT Big Twin 5-Speed | 1980-1985 |
| Harley-Davidson | FXD/FXST/FLH/FLT Big Twin 5-Speed | 1986-1999 |
Frequently Asked Questions
Yes, it fits 1980-1985 Evo Big Twin 5-speed models including FXWG.
Yes, direct fit for the transmission main drive gear bearing retainer gasket.
This is a multi-layer steel (MLS) gasket for superior sealing and durability.
No, the silicone beading provides sealing; RTV not required but can be used sparingly on corners.
Installation Guide
Difficulty
Medium
Est. Time
45 min
Tools Required
- socket set (3/8" drive)
- torque wrench
- gasket scraper
- Harley transmission cover gasket sealant (optional)
Pro Tips
- Clean all old gasket material with plastic scraper. Torque bolts in crisscross pattern to spec (10-15 ft-lbs). Apply light oil to bolts.
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Over-torquing bolts leading to distortion
Comparison vs Stock/OEM
Upgraded MLS construction vs. stock paper/composite gasket
Improvements
- Better heat resistance
- Superior sealing on imperfect surfaces
- Longer service life
Considerations
- Slightly thicker (0.030") may require checking clearances
Durability & Warranty
Expected Lifespan
Engine rebuild lifespan (50,000+ miles with proper torque)
Warranty
1 year manufacturer defect warranty
Maintenance
Inspect during transmission service; reusable if undamaged
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