Force Master is the innovative CDI which allows to change the injection in order to fit perfectly the Malossi 4-stroke cylinder kit. This CDI has been scheduled with different maps so as to be coupled perfectly with your vehicle whatever its setting is! Complete cylinder I-TECH 4 STROKE 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. CDI Force Master Carburation adjusting ± 6% at min/medium/max RPM limiter : + 1000 RPM 4 different maps 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 Special rings with high sliding ease and very high mechanical resistance. I° ring compression in nitrided and chromium steel. II° special cast iron ring. Three piece scraper ring made of chromiumplated special steel alloy. Technical data Complete cylinders I-TECH 4 STROKE Cylinder+CDI Bore Ø Stroke mm Displacement cc Compression ratio CDI MAPS 3117561 61 57.9 169.2 12.2:1 5517567 0 - 125cc with kit Malossi ø61 + Original exhaust system 1 - 125cc with kit Malossi ø61 + Malossi exhaust system with db killer 2 - CDI excluded 3 - CDI excluded