How Motorcycles

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shaft drives throttle bodies engine wheel tire axle center point gear oil lubricant fill hole drain bolt 90 ninety degree gearset zoomed in ball bearing universal joint sometimes covered with rubber boot beveled gears another 90 ninety degree gearset on some motorcycles the front 90 ninety degree gearset is lubricated by the engine transmission oil on other motorcycles it is lubricated by its own separate lubricant usually a heavy weight 80w90 hypoid gear oil if it is separately lubricated it must be sealed from the transmission the rear 90 ninety degree gearset has its own 80w90 hypoid gear oil lubrication or similar lubricant