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Start ShoppingCometic C9193 Evo Sportster EST Gasket Kit - High-Performance Engine Sealing Solution
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Description
Ensure optimal engine performance and longevity with Cometic's premium gasket kit engineered for Evolution Sportster EST configurations. This specialized kit delivers advanced sealing technology to prevent leaks and maintain peak engine efficiency under demanding riding conditions.
Key Features
- Premium MLS & AFM Materials: Cometic's EST kits utilize multi-layer steel (MLS) and aluminum foam material (AFM) for enhanced sealing, reducing the risk of compression leaks and thermal stress.
- Comprehensive EST Configuration Coverage: Specifically designed for Evolution Sportster engines with upgraded material sets, this kit addresses critical sealing points for top-end and side-cover services.
- Durable Composite Seals: Advanced fiber/composite materials provide flexibility and resilience, ensuring reliable performance across temperature extremes and high-performance scenarios.
Why Choose This Product
Cometic's C9193 kit offers unmatched sealing reliability for riders who demand precision engineering. The combination of MLS, AFM, and composite materials creates a robust sealing system that withstands high temperatures, vibration, and pressure. This specialized kit is essential for maintaining engine integrity during aggressive riding and prolonged use, minimizing the risk of costly repairs from gasket failure.
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Ensure optimal engine performance and longevity with Cometic's premium gasket kit engineered for Evolution Sportster EST configurations. This specialized kit delivers advanced sealing technology to prevent leaks and maintain peak engine efficiency under demanding riding conditions.
Key Features
- Premium MLS & AFM Materials: Cometic's EST kits utilize multi-layer steel (MLS) and aluminum foam material (AFM) for enhanced sealing, reducing the risk of compression leaks and thermal stress.
- Comprehensive EST Configuration Coverage: Specifically designed for Evolution Sportster engines with upgraded material sets, this kit addresses critical sealing points for top-end and side-cover services.
- Durable Composite Seals: Advanced fiber/composite materials provide flexibility and resilience, ensuring reliable performance across temperature extremes and high-performance scenarios.
Why Choose This Product
Cometic's C9193 kit offers unmatched sealing reliability for riders who demand precision engineering. The combination of MLS, AFM, and composite materials creates a robust sealing system that withstands high temperatures, vibration, and pressure. This specialized kit is essential for maintaining engine integrity during aggressive riding and prolonged use, minimizing the risk of costly repairs from gasket failure.| SKU | GMC7BF5AF7 |
|---|---|
| MPN | C9193 |
| Brand | Cometic |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Harley-Davidson | Sportster (Evolution engine) | 1986-1990 |
Installation Guide
Difficulty
Medium
Pro Tips
- Lay out all gaskets from the C9193 kit on a clean bench and match them to each engine cover or component before disassembly.
- Take photos of each sealing surface and gasket orientation during teardown to ensure correct reassembly.
- Thoroughly clean and degrease all mating surfaces; use plastic or brass scrapers to avoid gouging aluminum.
- Chase threads and blow out blind holes so torque readings are accurate and gaskets clamp evenly.
- After the first heat cycle, inspect for oil seepage and re‑check fastener torque where the service manual allows re‑torquing.
Common Mistakes to Avoid
- Re‑using old, damaged, or contaminated gaskets when the kit is intended to replace them.
- Installing new gaskets on dirty or oil‑coated sealing surfaces, which can cause immediate leaks.
- Not following Harley‑Davidson torque specifications and tightening sequence for Sportster Evo engines.
- Using RTV or sealants where Cometic specifies a dry install, which can cause squeeze‑out and poor clamping.
- Mixing up very similar gaskets (bolt pattern or port shape off by 1–2 mm) and forcing fitment.
Comparison vs Stock/OEM
Designed as an upgraded replacement for OEM Harley-Davidson Evo Sportster gaskets, typically providing improved sealing and durability compared to factory paper or basic composite gaskets.
Improvements
- Use of advanced materials (e.g., MLS and AFM where applicable) to better tolerate heat cycles and minor surface imperfections.
- More consistent clamping and long-term oil-sealing performance on aged Evo Sportster cases and covers.
- Performance‑oriented design intended to support engines that see higher RPM, increased cylinder pressure, or frequent heat cycling.
Considerations
- Correct surface prep and torque procedures are more critical with performance gasket materials; improper installation can negate the benefits.
- Always verify that this specific kit (C9193) matches the exact year and configuration of the Evo Sportster engine; Harley changed details across years.
Durability & Warranty
Warranty
Typical Cometic limited manufacturer warranty against defects in materials and workmanship; terms vary by seller and region.
Maintenance
Inspect for oil or compression leaks during routine service intervals; no direct maintenance on the gaskets themselves once installed correctly.
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