That is a very good question and the answer is - you can't. One of the faults of the Majesty is it has no dipstick for the final drive oil.
You could make one when you change the oil - which is very easy to do, but Yamaha provides no method to check the level of the final drive oil.
You could make one when you change the oil - which is very easy to do, but Yamaha provides no method to check the level of the final drive oil.