have a 09 450. bike was running perfectly fine all day. started feeling like it was losing power. and then about 45 min later it started bogging when holding it wide open. I know these bikes are know for fuel problems. anybody that has had fuel problems did it start like this? I was doing some research and if it is a fuel problem, its not the pump just the fuel filter? and when you replace it do you have any O-rings or gaskets to replace as well?