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Start ShoppingATHENA 485cc Big Bore Top End Gasket Kit - High-Quality Gaskets for 4-Stroke Engines
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Description
Upgrade your 4-stroke engine's sealing performance with the ATHENA P400485160021 Big Bore Top End Gasket Kit. Engineered for 485cc big bore cylinder kits, this comprehensive gasket set delivers reliable sealing, durability, and peak engine efficiency for riders demanding top-tier performance.
Key Features
- High-Quality Composite Paper Gaskets: Provide excellent thermal resistance and sealing integrity for long-lasting performance.
- Silicone Rubber Seals: Offer superior flexibility and resistance to oil and heat, ensuring leak-proof operation.
- Steel Base Gaskets: Deliver exceptional structural support and heat resistance for critical engine components.
- Complete Kit Includes: Cylinder head gasket, base gasket, exhaust gasket, crankcase gasket, and valve cover gasket for full coverage.
Why Choose This Product
Engineered for 485cc big bore cylinder kits, this gasket set combines advanced materials with precise engineering to prevent leaks, reduce maintenance, and enhance engine longevity. The composite paper and silicone rubber components ensure compatibility with high-performance engines, while the steel base gaskets provide robust sealing under extreme conditions. Perfect for riders seeking reliable, durable solutions for their 4-stroke powersports equipment.
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Upgrade your 4-stroke engine's sealing performance with the ATHENA P400485160021 Big Bore Top End Gasket Kit. Engineered for 485cc big bore cylinder kits, this comprehensive gasket set delivers reliable sealing, durability, and peak engine efficiency for riders demanding top-tier performance.
Key Features
- High-Quality Composite Paper Gaskets: Provide excellent thermal resistance and sealing integrity for long-lasting performance.
- Silicone Rubber Seals: Offer superior flexibility and resistance to oil and heat, ensuring leak-proof operation.
- Steel Base Gaskets: Deliver exceptional structural support and heat resistance for critical engine components.
- Complete Kit Includes: Cylinder head gasket, base gasket, exhaust gasket, crankcase gasket, and valve cover gasket for full coverage.
Why Choose This Product
Engineered for 485cc big bore cylinder kits, this gasket set combines advanced materials with precise engineering to prevent leaks, reduce maintenance, and enhance engine longevity. The composite paper and silicone rubber components ensure compatibility with high-performance engines, while the steel base gaskets provide robust sealing under extreme conditions. Perfect for riders seeking reliable, durable solutions for their 4-stroke powersports equipment.
| SKU | GM585A9E32 |
|---|---|
| MPN | P400485160021 |
| Brand | Athena |
| Category | Gaskets/Seals |
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Featured Review
| Make | Model | Years |
|---|---|---|
| KTM | 450 SX-F | 2019-2025 |
| KTM | 450 EXC-F | 2019-2025 |
| Husqvarna | FC 450 | 2019-2025 |
| Husqvarna | FE 450 | 2019-2025 |
Frequently Asked Questions
Yes, this is a complete top-end gasket kit including head gasket, base gasket, exhaust gasket, and all necessary seals for Athena 485cc big bore installations.
No, this kit is specifically designed for Athena's 485cc big bore cylinder kits only. It will not fit stock cylinders.
Fits KTM 450 SX-F/EXC-F and Husqvarna FC450/FE450 2019-2025 when using Athena 485cc big bore cylinder.
No, follow standard engine break-in procedures. The gaskets don't affect break-in but ensure proper torque during assembly.
Installation Guide
Difficulty
Medium
Est. Time
2 hr 0 min
Tools Required
- torque wrench
- socket set
- gasket scraper
- piston ring compressor
- feeler gauges
Pro Tips
- Clean all surfaces with brake cleaner before installation
- Follow factory torque specs and sequence
- Apply light engine oil to O-rings and seals
Common Mistakes to Avoid
- Not cleaning mating surfaces thoroughly
- Incorrect torque sequence on cylinder head bolts
- Overlooking O-ring lubrication
Comparison vs Stock/OEM
Designed specifically for aftermarket big bore cylinder - OEM gaskets won't fit 485cc bore size
Improvements
- Higher compression sealing capability
- Improved material durability for racing applications
- Exact fit for Athena performance cylinders
Considerations
- Requires big bore cylinder kit purchase
Durability & Warranty
Expected Lifespan
Matches engine rebuild interval (40-100 hours racing)
Warranty
2 year manufacturer defect warranty
Maintenance
Inspect during regular top-end services
What Others Are Saying
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