A power transmission casing apparatus in a motorized two wheeled vehicle which comprises {HEAD ~ a case main body} extending from one lateral side of {TAIL ~ an internal combustion engine} to one lateral side of a rear wheel in rear thereof and supporting rotatably a wheel axle of the rear wheel 
A power transmission casing apparatus in a motorized two wheeled vehicle which comprises { HEAD ~ a case main body } extending from one lateral side of { TAIL ~ an internal combustion engine } to one lateral side of a rear wheel in rear thereof and supporting rotatably a wheel axle of the rear wheel
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