POLINI Thermal Group D.40 cast iron cylinder

The POLINI D.40 thermal group is a cast iron cylinder designed to ensure high performance and long durability. With a bore of 40 mm, this cylinder is ideal for those looking to enhance their engine's performance. Its cast iron construction offers superior resistance and optimal heat dissipation, making it perfect for use on scooters and motorcycles.

Installation requires attention and precision: it is essential to disassemble the old thermal group and check that all mechanical parts, such as bearings and the crankshaft, are in perfect condition. A thorough cleaning of the cylinder and piston with gasoline, followed by proper lubrication, is essential to ensure correct operation.

During assembly, it is important to correctly position the new base gasket and the piston, ensuring that the arrow on the piston is oriented towards the exhaust. Checking that the piston moves freely within the cylinder is crucial to avoid unwanted friction.

The POLINI D.40 thermal group is designed for optimal break-in: during the first 500 km, it is advisable not to exceed 3/4 of the throttle opening and to avoid keeping the engine under prolonged stress. By following these guidelines, you will ensure a long life for the engine and high performance over time. It is recommended to use only original POLINI Motori spare parts to achieve the best results.

• Bore: 40 mm
• Material: Cast Iron
• Type: Cylinder
• Application: Scooter and motorcycle
• Resistance: Superior
• Heat dissipation: Optimal
• Installation: Requires attention and precision
• Mechanical parts check: Bearings and crankshaft
• Cleaning: Thorough with gasoline
• Lubrication: Necessary for correct operation
• Assembly: Correct positioning of the base gasket and piston
• Piston orientation: Arrow towards the exhaust
• Break-in: Optimal up to 500 km
• Throttle opening limitation: Do not exceed 3/4
• Avoid prolonged stress: During break-in
• Spares: Use only original POLINI Motori