I have an 06 Yamaha Roadliner that I bought used. The problem I am having is , at highway speeds between 60-70 mph, it seems to be flooding. It will start to spit and sputter causing to loose speed. If I slightly throttle or decellerate it goes away only to start doing it again when I hold throttle. The bike has after market exhaust and a power commander. I took it to the local Yamaha dealer and they told me that the power commander was bad. They replaced it and $650 later, it still does it. I disconected the exup servo motor and replaced with servo buddy. Didn't fix the problem. Anyone have any ideas? Usually the problem happens at a range of 2000-3000 rpms after the bike has warmed up for a bit.