When I fill up the 900S, my gas gauge bars seems to be 1 down versus all lit? Then it knida pops on and off. Saw this on rides when the bars seem to go up and down. Assume thats due to incline and decline of the trails but when its on the driveway it should show true amount. Is it me or does the machine have an issue. Dont want to have to take it in and pay the service dept money to tell me its normal.