Description
2019-2026 Yamaha YZ250F 80mm Big Bore 14.6:1 High Compression Piston Kit. Custom designed and engineered by us; this high-quality 80mm big bore piston kit delivers a significant increase in horsepower and torque across the entire power curve compared to the stock piston. It is the perfect upgrade for serious riders and racers. The piston works excellent with both stock and modified engines.
Key Features:
- Performance Gains: Noticeable increase in horsepower and torque throughout the entire RPM range.
- Horizontal Gas Ports: Specially designed and tested horizontal gas ports that drastically improve ring seal, greatly reduce blow-by, and eliminate the oil migration out of the valve cover that the YZ250F is known for. The superior ring seal also significantly extends piston service life.
- DLC Coated Wrist Pin: Reduces friction, improves performance, and extends service life.
- Drop-In Design: Direct bolt-on installation with no machining required.
- Fuel Requirement: Minimum 91–93 octane (RON). Race fuel (such as C12, VP100, VP U4.2, T4, Pro6, MR12, ETS MX18, or MX21) is highly recommended for maximum performance and reliability.
- Premium Manufacturing: Produced by JE Pistons from high-strength 2618 aluminum alloy for superior durability under high-performance conditions.
- Maximum Performance: For best results, we recommend pairing this piston kit with our Vortex ECU and custom fuel/ignition maps.
Kit Includes:
- 14.6:1 High Compression Piston
- DLC Coated Wrist Pin
- Titanium Nitride Coated Ring Pack
- Circlips
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