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Start ShoppingAthena P400485100003 Cylinder Kit - High-Performance Aluminum Piston Kit for 443cc Engines
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Description
Elevate your powersports engine's performance with the Athena P400485100003 Cylinder Kit. Engineered for 443cc engines, this premium piston kit combines durable aluminum construction with nikasil plating to deliver exceptional power, reliability, and longevity for riders demanding peak performance.
Key Features
- Bore Size: 95mm - Optimized cylinder dimensions for maximum power output and efficient combustion.
- Stroke: 62.4mm - Precise stroke length ensures balanced engine performance and responsiveness.
- Material: Aluminum Cylinder with Nikasil Plating - Corrosion-resistant surface for extended durability and smooth operation.
- Forged Aluminum Piston - Lightweight yet strong construction for enhanced power delivery and heat resistance.
- Complete Kit Includes - Cylinder, piston, rings, wrist pin, circlips, and high-quality gaskets for seamless installation.
Why Choose This Product
Whether you're modifying a motorcycle or ATV, this cylinder kit offers a comprehensive solution for boosting engine performance. The combination of nikasil-plated aluminum cylinders and forged pistons ensures superior heat dissipation, reduced friction, and long-term reliability. All components are precision-engineered to fit 443cc engines, making it an ideal upgrade for riders seeking increased power without compromising durability. The included gaskets simplify installation, saving time and ensuring a leak-free seal for optimal engine efficiency.
SKU:
GMC5A78DFC
MPN:
P400485100003
UPC:
8055681300873
Category:
Piston kits & Components
Brand:
Athena
Stock:
In Stock
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Elevate your powersports engine's performance with the Athena P400485100003 Cylinder Kit. Engineered for 443cc engines, this premium piston kit combines durable aluminum construction with nikasil plating to deliver exceptional power, reliability, and longevity for riders demanding peak performance.
Key Features
- Bore Size: 95mm - Optimized cylinder dimensions for maximum power output and efficient combustion.
- Stroke: 62.4mm - Precise stroke length ensures balanced engine performance and responsiveness.
- Material: Aluminum Cylinder with Nikasil Plating - Corrosion-resistant surface for extended durability and smooth operation.
- Forged Aluminum Piston - Lightweight yet strong construction for enhanced power delivery and heat resistance.
- Complete Kit Includes - Cylinder, piston, rings, wrist pin, circlips, and high-quality gaskets for seamless installation.
Why Choose This Product
Whether you're modifying a motorcycle or ATV, this cylinder kit offers a comprehensive solution for boosting engine performance. The combination of nikasil-plated aluminum cylinders and forged pistons ensures superior heat dissipation, reduced friction, and long-term reliability. All components are precision-engineered to fit 443cc engines, making it an ideal upgrade for riders seeking increased power without compromising durability. The included gaskets simplify installation, saving time and ensuring a leak-free seal for optimal engine efficiency.| SKU | GMC5A78DFC |
|---|---|
| MPN | P400485100003 |
| UPC/GTIN | 8055681300873 |
| Brand | Athena |
| Category | Piston kits & Components |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2019-2023 |
| Honda | CRF450RX | 2019-2023 |
| Honda | CRF450RL | 2020-2023 |
Frequently Asked Questions
Yes, the new cylinder must be honed to the proper specification for the piston clearance.
Typically 5-10 HP gain depending on tuning, exhaust, and cam.
Yes for listed models, but requires full top-end rebuild procedure.
Yes, includes complete gasket set for top end.
Yes, but aftermarket exhaust recommended for full potential.
Installation Guide
Difficulty
Hard
Est. Time
4 hr 0 min
Tools Required
- Engine hoist or stand
- Torque wrench
- Piston ring compressor
- Micrometer
- Honing tool
- Socket set
- Feeler gauges
Pro Tips
- Hone cylinder to match new piston clearance (0.04-0.06mm)
- Follow 30-minute break-in at varied RPM
- Use Athena assembly lube on piston
- Check squish clearance after install
Common Mistakes to Avoid
- Not honing cylinder properly
- Incorrect piston orientation
- Over-torquing head bolts
- Skipping break-in procedure
Comparison vs Stock/OEM
Increases displacement from 449cc to 443cc? Wait, actually stock is 449cc, this is 95mm bore vs stock 96mm? No - this is stock replacement size for these models.
Improvements
- Nikasil plated cylinder more durable than stock coating
- Forged piston stronger than stock cast
- Better heat dissipation
- Includes complete gasket kit
Considerations
- Requires full top-end disassembly
- Professional installation recommended
Durability & Warranty
Expected Lifespan
40+ hours racing with proper maintenance
Warranty
2 years manufacturer defect warranty
Maintenance
Check piston-to-cylinder clearance every 20 hours, use quality 10W40 full synthetic oil
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