Honda CN 250 Big Bore Cylinder

TECHNICAL FEATURES 77mm Bore allum. H2O 4-stroke Cylinder Material: primary aluminium alloy with a high content of hardened and tempered silicon, cylinder liner with silicon carbide coating in a galvanic nickel die and crossed smoothing with two diamond passages with very limited tolerances. Machining: on machine tools with high precision numerical control. Cylinder-piston connection with an allowance of 0.05 mm. Recalculated and upgraded heat exchange surfaces. Piston Ultra compact with 3 rings. Material: special aluminium alloy with high silicon content, low thermal expansion and a tin facing on the sliding surfaces. Machining on machine tools with numerical control. Lightened and reinforced. Upgraded heat exchange surfaces. Piston rings Compression - special rings with high sliding ease and very high mechanical resistance, in chromium-plated S10 spheroidal cast-iron. 1st scraper - ring in chromium-plated S10 spheroidal cast iron. 2nd three - piece scraper ring made of chromium-plated steel alloy.