Athena Big Bore Cylinder Kit P400250100007 — Kawasaki KX65 2002-2025

Athena Big Bore Cylinder Kit P400250100007 — Kawasaki KX65 2002-2025

Product Description

Take your Kawasaki KX65 to the next level with the Athena Big Bore Cylinder Kit. Engineered to boost your displacement to 80cc, this kit provides a significant performance increase that racers demand to stay at the front of the pack. By replacing your stock top end with this high-grade aluminum cylinder, you unlock increased torque and a broader powerband, perfect for pulling out of tight corners and clearing big obstacles.

Each cylinder is finished with a durable nickel carbide coating to ensure exceptional heat management and reduced friction. The kit includes a high-performance aluminum cylinder head featuring a removable bronze dome for optimized combustion, along with a precision-matched Cast Lite piston kit. Athena also includes a full top-end gasket set and specialized, hard-anodized power valves designed specifically for this cylinder's geometry, ensuring total reliability and professional-grade performance.

Top Features: Athena Big Bore Cylinder Kit

• Increases displacement to 80cc for enhanced competitive power
• Lightweight aluminum cylinder with nickel carbide coating for long-lasting durability
• Includes specialized, high-performance hard anodized power valves
• Aluminum cylinder head features a removable bronze dome for improved cooling
• Comprehensive kit includes Cast Lite piston, rings, clips, pin, and top-end gaskets

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Sub-Model
2002-2025	Kawasaki	KX65

Frequently Asked Questions

Q: Is this kit a direct bolt-on for my KX65?
A: Yes, it is designed as a performance bolt-on upgrade. However, increasing displacement changes the internal engine environment significantly, so it is required to re-jet your carburetor and verify your timing to get the best performance and avoid running lean.

Q: Why can't I reuse my original power valves?
A: This Athena big bore cylinder features modified port timing and combustion chamber geometry compared to the factory cylinder. The included Athena power valves are specifically shaped to match this new design for optimal flow and power delivery.

Expert Pro-Tip: When installing a big bore kit, don't rush the break-in period. Run your first tank of fuel with a slightly richer oil-to-gas ratio and avoid wide-open throttle for the first few heat cycles. This allows the ring set to properly seat against the new cylinder wall, ensuring you get the full life and compression potential out of your expensive new top end.

Recommended Pairings:
o Kawasaki KX65 Performance Parts & Upgrades
o Premium Motorcycle Chemicals
o Kawasaki 2-Stroke Performance Parts

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