In its latest generation, the Yamaha YZ 125 stands out for its remarkable engine power and agile riding, delivering swift acceleration response and impeccable curve control. The power delivery is finely balanced, providing significant power thrust without compromising maneuverability. The transmission ensures smooth gear changes, allowing the rider to maintain control in every situation.
Respecting and enhancing these features, Athena introduces the new Standard Bore Cylinder Kit, a replacement solution for the OEM components, applying the expertise and know-how that have made it an industry leader.
Excellence in Construction Technology
Meticulous attention to construction details begins with careful material selection, preserving the cylinder kit's lightweight and robust qualities. Designed, tested, and produced in-house at Athena's facilities, this cylinder kit promises impeccable performance and superior reliability over time.
The Choice of Motocross Mechanics
The Athena Standard Bore Cylinder Kit 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 Resilient Heart
The cylinder, the heart of this kit, is the result of Athena's experience in creating cylinders for tracks worldwide. Crafted with a high-quality aluminum alloy, the cylinder offers strength, durability, and solidity. Engineered to ensure an effective cooling system, the Athena cylinder guarantees optimal performance and prevents overheating during intensive use. The cylinder's design carefully studies geometry to optimize gas flow, resulting in quick acceleration response and uniform power distribution across the entire usage range. Rigorous testing sessions have determined the balance and fluidity of Athena's cylinder at all RPMs.
The Piston: Maximizing Efficiency
Athena's piston is meticulously designed for weight and balance, maximizing engine efficiency. The advanced profile design contributes to consistent power, quick gas response, and extended durability. The lightweight of the piston reduces inertia, enabling faster accelerations and enhanced motorcycle agility. Precision in piston manufacturing is crucial, with tight tolerances ensuring proper sealing in Athena cylinders, maximizing combustion efficiency, and reducing compression losses.
Gaskets: Extreme Reliability
The Athena cylinder kit includes a complete gasket kit for a hassle-free installation. Material quality and production techniques are crucial to maintaining engine integrity and preventing fluid leaks. Reliable and durable sealing significantly contributes to engine performance and reliability. In the extreme environment experienced by motocross bikes, Athena gaskets withstand thermal stress and all types of vibrations, ensuring optimal integrity and functionality for all engine components.
The new Standard Bore Cylinder Kit 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.
Confirm the exact year, make, model and trim before ordering. Send us SKU 227210 with your vehicle info and we can help verify fitment.
Shipping services and final delivery cost are shown at checkout. Returns are confirmed before an RMA is issued — parts generally need to be uninstalled, unused and in original packaging. Full policy.
