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Given the piston skirt is the bit of the piston under the gudgeon pin on the piston/conrod, it seems this is a way of reducing drag and wear on the cylinder (i.e. less contact patch) and therefore making it more efficient. A similar principle is used in slipper pistons A slipper piston is a piston for a petrol engine, that has been reduced in size and ...


Engines with a single cylinder can be arranged at any angle but typically upright or inverted. In Gixxer they says, "An inverted triangle shaped piston skirt has also been utilised to increase bottom end torque, smaller and lightweight rocker arms and a reduced angle of the valves have all helped better combustion, aided by the good looking dual type ...

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