HONDA CRF 250 R (2004-2009) Forged Pistons. Piston kit of the extra class 81.00 mm

This reduces friction and leads to even higher heat resistance. The internal bracing minimizes piston deformation in order to achieve maximum ring support and deliver more force. The additional oil can lubricate the piston pin through the inner windows.These windows together with the CP standard `` Double - Pin - Oiler '' promote a longer life and more usable horsepower. The inner bracing additionally strengthens the part in the most critical area of the bolt hole. It maximizes the durability by reducing the friction in the piston pin bore. New Nikasil cylinder required. For year of construction 2009.