Got a new 2014 bx25 (17 hours) and the fuel gauge doesn't read fuel all the time. It's all the way to the top in the tank and it never reads true. If I lift the seat and pound on the tank it will raise the when I shut I off and turn it back on it sweeps then back down to 3/4 full again. Any ideas? I know it's under warranty but I thought if it's something stupid it would save me a trip 35-40 miles one way to get service work done. Thanks