ATHENA Big Bore Cylinder Kit P400485100039 112cc for Yamaha YZ 85

The Big Bore cylinder kit of 112cc is specifically designed for the Yamaha YZ 85, offering a significant performance boost and an exhilarating riding experience. Made from high-quality aluminum alloys, this cylinder is the result of over a decade of technological innovation, ensuring superior reliability and durability.

Thanks to an advanced manufacturing process, the cylinders are cast in steel molds and machined using CNC machines, ensuring millimeter tolerances at every stage of production. The special nickel-silicon alloy used for the coating helps improve the performance and longevity of the cylinder, while the water channels have been optimized to increase cooling capacity.

With a bore of 53 mm and a stroke of 51 mm, this cylinder offers a displacement of 112cc and a compression ratio of 13.8:1, allowing it to reach a maximum power of 23.1 HP at 10,840 RPM. The design includes five transfer ports and an oval exhaust system with two boosters, ensuring optimal gas flow and a responsive engine response.

Each cylinder undergoes rigorous quality control and is tested at optimal internal temperatures to ensure maximum precision in bore sizes and dimensions. The completely flat surfaces eliminate any mounting inaccuracies, making installation simple and straightforward.

The 112cc Big Bore cylinder kit represents the ideal choice for those looking to enhance their Yamaha YZ 85, combining high performance with excellent construction.

• Bore: 53 mm
• Stroke: 51 mm
• Displacement: 112cc
• Compression ratio: 13.8:1
• Maximum power: 23.1 HP at 10,840 RPM
• Number of transfer ports: 5
• Exhaust type: oval with two boosters
• Material: high-quality aluminum alloys
• Coating: nickel-silicon alloy
• Manufacturing process: cast in steel molds and machined with CNC machines
• Quality control: rigorous and tested at optimal internal temperatures
• Surfaces: completely flat for precise mounting