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Start ShoppingAthena P400270100002 Cylinder Kit - High-Performance Piston Kit for Powersports Engines
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Description
Elevate your engine's performance with the Athena P400270100002 Cylinder Kit, engineered for powersports enthusiasts who demand peak power, durability, and precision. This premium piston kit is designed to deliver superior combustion efficiency and long-term reliability for high-output engines.
Key Features
- Forged Aluminum Pistons: Enhanced strength and heat resistance for extreme performance conditions.
- Precision Machining: Tight tolerances ensure optimal engine efficiency and reduced wear.
- Compatibility: Specifically engineered for Athena-powered engines to fit seamlessly without modifications.
- Durable Coatings: Advanced surface treatments protect against corrosion and thermal stress.
- Easy Installation: Designed for straightforward replacement of worn or damaged cylinder components.
Why Choose This Product
Whether you're racing, off-roading, or pushing your powersports vehicle to its limits, the Athena Cylinder Kit offers a reliable solution for maximizing power output while maintaining engine longevity. Its advanced materials and precise engineering make it an ideal upgrade for riders seeking enhanced performance without compromising durability. The kit's compatibility with Athena engines ensures hassle-free installation, making it a smart investment for serious riders.
SKU:
GM63B70B4C
MPN:
P400270100002
Category:
Piston kits & Components
Brand:
Athena
Stock:
Out of Stock
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Elevate your engine's performance with the Athena P400270100002 Cylinder Kit, engineered for powersports enthusiasts who demand peak power, durability, and precision. This premium piston kit is designed to deliver superior combustion efficiency and long-term reliability for high-output engines.
Key Features
- Forged Aluminum Pistons: Enhanced strength and heat resistance for extreme performance conditions.
- Precision Machining: Tight tolerances ensure optimal engine efficiency and reduced wear.
- Compatibility: Specifically engineered for Athena-powered engines to fit seamlessly without modifications.
- Durable Coatings: Advanced surface treatments protect against corrosion and thermal stress.
- Easy Installation: Designed for straightforward replacement of worn or damaged cylinder components.
Why Choose This Product
Whether you're racing, off-roading, or pushing your powersports vehicle to its limits, the Athena Cylinder Kit offers a reliable solution for maximizing power output while maintaining engine longevity. Its advanced materials and precise engineering make it an ideal upgrade for riders seeking enhanced performance without compromising durability. The kit's compatibility with Athena engines ensures hassle-free installation, making it a smart investment for serious riders.
| SKU | GM63B70B4C |
|---|---|
| MPN | P400270100002 |
| Brand | Athena |
| Category | Piston kits & Components |
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Featured Review
| Make | Model | Years |
|---|---|---|
| KTM | 65 SX | 2001-2008 |
| KTM | 65 XC | 2008-2008 |
Frequently Asked Questions
According to RevZilla’s fitment chart, it fits KTM 65 SX models from 2001 through 2008 and KTM 65 XC models in the same range.[1] Always confirm with your VIN and a parts fiche before ordering.
Yes. Increasing displacement from 65cc to about 80cc generally requires richer jetting and sometimes ignition setup changes to avoid a lean condition and engine damage. Consult your tuner or reference jetting guidelines specific to this kit.
The kit includes the big bore cylinder, piston, rings, pin, circlips, and a top-end gasket set as listed by retailer descriptions.[1] You will still need coolant, 2‑stroke oil, and basic shop supplies.
The kit is designed to work with the OEM head on specified KTM 65 SX/XC models, unless otherwise specified in Athena’s documentation. For race applications, some riders use modified or aftermarket heads; verify combustion chamber volume if you do.
Many youth 65cc race classes do not allow big bore kits. Check your sanctioning body’s rulebook (AMA, local series, etc.) before installing this kit for competition use.
Installation Guide
Difficulty
Medium
Est. Time
2 hr 0 min
Tools Required
- metric socket set
- torque wrench
- feeler gauges
- piston pin circlip pliers or small pick
- gasket scraper or plastic scraper
- coolant drain pan
- service manual for torque specs and torque pattern
Pro Tips
- Lay out and compare all supplied gaskets with OEM pieces before disassembly to ensure correct placement
- Lightly oil piston, rings, and cylinder wall during assembly to prevent dry start
- Rotate engine slowly by hand after assembly to confirm smooth movement and correct ring installation before first start
- Bleed cooling system thoroughly after refill to avoid hot spots in the new big bore cylinder
Common Mistakes to Avoid
- Installing piston with arrow not facing exhaust port
- Failing to properly seat piston ring locating pins before sliding cylinder on
- Not using a torque wrench on cylinder and head nuts
- Reusing old base/head gaskets instead of those supplied in the kit
- Insufficient cleaning of gasket surfaces leading to coolant or compression leaks
Comparison vs Stock/OEM
This Athena kit increases displacement from the stock 65cc to approximately 80cc, providing significantly more torque and power than the OEM cylinder and piston assembly.[1]
Improvements
- Larger displacement for stronger low‑end and mid‑range power
- Nickel‑silicon carbide coated aluminum cylinder for improved heat dissipation and wear resistance compared to many OEM plated cylinders
- Complete matched piston and gasket set engineered for the big bore cylinder
Considerations
- May not be legal in stock 65cc racing classes
- Requires carburetor re‑jetting and potentially other tuning changes
- Increased performance can marginally reduce overall engine longevity if not maintained properly
Durability & Warranty
Warranty
Standard Athena product warranty (length and terms vary by region; check Athena’s official documentation or the retailer’s listing for specific coverage).
Maintenance
Follow normal 2‑stroke top‑end practices: frequent air filter service, correct premix ratio, and periodic piston/ring inspection intervals based on race or recreational use.
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