Just put a new set of graphics on my '03 YZ450. Any advice for me on how to make them last longer without bubbling? Would it make any difference if I emptied the tank between rides? I put on a set of FX OEM ones so they have the vapor holes, but so did my last set and after a few months they began to bubble. Or are bubbles just the price of putting graphics on a gas tank instead of a shroud? Thanks for the help.