How Motorcycles

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how motorcycles knowledge is power trochoid oil pump 3-d view gerotor driven gear either chain and sprocket or spur gear oil inlet hole oil outlet hole outer 5-lobe rotor inner 4-lobe rotor oil inlet area of expanding volume (oil pulled into inlet hole) rotation area of decreasing volume (oil pushed out outlet hole) driven sprocket gasket surface stacked aluminum pump housing bolted together splined or keyyed shaft inner 4-lobe rotor outer 5-lobe rotor rotor housing oil inlet oil bolt cap-screw