Whatever the level of tuning of your machine, you will find the Athena cylinder kit that suits you. Standard or big bore, these complete kits provide you performance and reliability. You will find below some of the technical solutions adopted by these high quality products: Aluminum cylinder nickel-carbide treatedSpecial design increasing cooling liquid volumeHigh performance exhaust valvesBronze dome headForged piston, skirts coated with molybdenum disulfide treatmentSpare Parts : Piston 257009DA – Piston Rings : 271257 - Top engine gasket : 601289 Delivered with piston, piston rings, circlips, axis, seal and in some cases, cylinder head and exhaust valves. Pistons, rings and gaskets are also available as spare parts. Diameter: 76.8