POLINI Thermal Group D.63 stroke 54.8 170cc cast iron cylinder

The POLINI D.63 cylinder kit is designed to offer high performance and reliability for motorcycles. With a bore of 63 mm and a stroke of 54.8 mm, this cast iron cylinder reaches a displacement of 170 cc, capable of delivering a maximum power of 15.5 HP at 7,500 RPM.

This component is compatible with 2-valve heads and carburetors, ensuring optimized airflow and efficient combustion. The aluminum piston, with a diameter of 63 mm, features a chrome ring and a spheroidal cast iron ring, designed to ensure long-lasting durability and consistent performance.

The cylinder kit comes with detailed assembly instructions, which recommend paying particular attention to the assembly phase and initial break-in. By following the guidelines, optimal performance and increased engine longevity can be achieved. It is essential to use only original POLINI spare parts to maintain the efficiency and power of the vehicle.

• Bore: 63 mm
• Stroke: 54.8 mm
• Displacement: 170 cc
• Maximum power: 15.5 HP at 7,500 RPM
• Compatibility: 2-valve heads and carburetors
• Piston: aluminum with a diameter of 63 mm
• Piston ring: chrome and spheroidal cast iron
• Detailed assembly instructions included
• Importance of original POLINI spare parts