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