I have a 2003 WR450 supermoto. Right now it has mostly stock seat/tank/plastics, with a cut down front fender and a YZ rear fender with DRC Edge light. I'd like to get longer range on a tank, 2.6 gallons doesn't get me all that far if I'm having fun. I found a 4.1 gallon tank on CL, the guy said it was on his 2006 WR450. Will it fit my 2003? I know I've read that the shrouds are different, but is there anything else I need to replace to make it work?