- Replacement solution for the original, excellent construction technology for flawless performance.
- Uncompromising reliability and performance, advanced design, and superior materials.
- High-quality aluminum alloy cylinder, effective cooling, and optimal performance.
- Pistons and gaskets designed for maximum efficiency, durability, and reliable sealing.
The latest generation Yamaha YZ 125 stands out for its extraordinary engine power and agile chassis, offering responsive acceleration and impeccable cornering. Power delivery is well balanced, providing significant thrust without sacrificing maneuverability. The transmission offers smooth gear changes, allowing the rider to maintain control in all situations.
Respecting and enhancing these characteristics, Athena presents the new Standard Bore Engine, a replacement for the original, applying the expertise and know-how that have made it a leader in the sector.
Excellent Construction Technology
Attention to construction details starts with the careful selection of materials, preserving the lightness and strength of the thermal unit. Designed, tested, and manufactured in-house at Athena's facilities, this thermal unit promises flawless performance and superior reliability over time.
The Choice of Motocross Mechanics
The Athena Standard Bore Thermal Unit is the ideal solution for motocross mechanics looking to replace original components without compromising performance and reliability. Choosing Athena means relying on a leading brand, synonymous with innovation and quality in the industry.
The Cylinder: Powerful and Resistant Heart
The cylinder, the heart of this kit, is the result of Athena's experience in creating cylinders for tracks around the world. Made from high-quality aluminum alloy, the cylinder offers strength, durability, and solidity. Designed to ensure an effective cooling system, the Athena cylinder guarantees optimal performance and prevents overheating during intensive use.
During the design phase, the geometry of the cylinder is carefully studied to optimize gas flow and maximize combustion efficiency. This translates into a responsive acceleration and uniform power distribution across the entire range of use.
The rigorous testing sessions to which the Athena cylinder has been subjected have determined the balance and fluidity of power delivery at all speeds.
The Piston: Maximized Efficiency
The Athena piston is designed with meticulous attention to weight and balance, maximizing engine efficiency. The advanced profile design contributes to consistent power, responsive throttle response, and extended durability.
The Athena piston is designed with attention to weight and balance to maximize engine efficiency. The lightness of the piston helps reduce inertia, allowing for faster acceleration and greater agility of the motorcycle. Precision in the manufacture of the piston is essential. Tight tolerances ensure a proper seal in Athena cylinders, maximizing combustion efficiency and reducing compression losses.
Gaskets: Extreme Reliability
The Athena thermal unit includes a complete gasket kit for hassle-free installation. The quality of the materials and production techniques used for the gaskets are crucial for maintaining engine integrity and preventing fluid leaks. A reliable and durable seal contributes significantly to engine performance and reliability. In an extreme environment such as that experienced by motocross bikes, Athena gaskets withstand all thermal stresses and vibrations of all kinds, ensuring optimal integrity and functionality for all engine components.
The new Standard Bore Thermal Unit is much more than a component for the new Yamaha YZ 125; it is a commitment to technical perfection and an extraordinary option for those seeking excellent performance and absolute reliability.
Install the Athena kit and get ready to dominate every track and competition.
Technical Specifications
Bore (mm) 54.00
Displacement (cc) 125.00
Enduro Range
Net Weight (kg) 1.94
Compression Ratio 14.7:1
