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Start ShoppingCometic C9305F1 MLS Evo Big Twin Inspection Cover Gasket - Durable Seal for High-Performance Engines
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Description
Upgrade your engine's sealing integrity with Cometic's C9305F1 MLS gasket, engineered for flawless performance on Evo Big Twin inspection/derby covers. This durable solution combines multi-layer steel with silicone beading to create an airtight seal that withstands high temperatures and extreme pressures.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides exceptional durability and resistance to thermal cycling for long-lasting performance.
- Silicone Beading: Ensures a perfect seal around the 3-5/8 in. bore, preventing leaks and maintaining engine efficiency.
- 0.015 in. Thickness: Optimized for precise fitment without compromising structural integrity.
- Lightweight Design: Weighs just 0.1 lbs for easy installation and reduced engine component stress.
Why Choose This Product
Cometic's C9305F1 gasket is trusted by mechanics and riders alike for its ability to maintain optimal engine performance. The combination of MLS steel and silicone beading creates a seal that resists warping and degradation, even under demanding conditions. Its precision fit for Evo Big Twin inspection covers ensures compatibility with OEM specifications, while the lightweight design minimizes unnecessary strain on engine components. Whether you're modifying your bike or maintaining peak performance, this gasket delivers reliable sealing that keeps your engine running smoothly.
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Upgrade your engine's sealing integrity with Cometic's C9305F1 MLS gasket, engineered for flawless performance on Evo Big Twin inspection/derby covers. This durable solution combines multi-layer steel with silicone beading to create an airtight seal that withstands high temperatures and extreme pressures.
Key Features
- Multi-Layer Steel (MLS) Construction: Provides exceptional durability and resistance to thermal cycling for long-lasting performance.
- Silicone Beading: Ensures a perfect seal around the 3-5/8 in. bore, preventing leaks and maintaining engine efficiency.
- 0.015 in. Thickness: Optimized for precise fitment without compromising structural integrity.
- Lightweight Design: Weighs just 0.1 lbs for easy installation and reduced engine component stress.
Why Choose This Product
Cometic's C9305F1 gasket is trusted by mechanics and riders alike for its ability to maintain optimal engine performance. The combination of MLS steel and silicone beading creates a seal that resists warping and degradation, even under demanding conditions. Its precision fit for Evo Big Twin inspection covers ensures compatibility with OEM specifications, while the lightweight design minimizes unnecessary strain on engine components. Whether you're modifying your bike or maintaining peak performance, this gasket delivers reliable sealing that keeps your engine running smoothly.| SKU | GMF6388C67 |
|---|---|
| MPN | C9305F1 |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | Evolution Big Twin | 1986-1999 |
| Harley-Davidson | FXD Dyna | 1986-1999 |
| Harley-Davidson | FLH/FLT Touring | 1986-1999 |
Frequently Asked Questions
No, this is specifically for Evolution Big Twin engines (1986-1999). Sportsters use Sportster-specific gaskets like C5390.
0.015 in. MLS construction is comparable to stock fiber gasket thickness but more durable.
Yes, if in good condition. Inspect for stretching and apply thread locker.
Yes, as long as the cover matches stock 3-5/8 in. bore Evo Big Twin dimensions.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Socket set (1/4 in. drive)
- Torque wrench
- Scraper or gasket remover
- Thread locker
Pro Tips
- Clean all old gasket material with brake cleaner. Torque to 80-100 in-lbs in crisscross pattern. Use blue Loctite on bolts.
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Over-torquing bolts (can warp cover)
Comparison vs Stock/OEM
Replaces fragile stock fiber/paper gasket
Improvements
- Superior sealing under high heat/pressure
- Resists blowouts
- Longer service life
Considerations
- MLS may require perfectly flat surfaces unlike compressible stock
Durability & Warranty
Expected Lifespan
Engine rebuild duration (50,000+ miles)
Warranty
1 year Cometic manufacturer defect warranty
Maintenance
Inspect during oil changes; replace if leaking
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