Hey Texan Z
What mods have you done to your bike? I have a 07 C50SE with Hardcrome 21/2 DD's and I actually get an increase in my mileage. I can get a little over 162 miles to a tank
and that is pushing it almost to the limit of the tank and I still have no sputter. You may have debris or dirt in the tank. My suggestion to you is to purge the tank then try it and if that don't work definatly take it to a mechanic and have them look at it.