We have a 2006 750 Katana with 1,409 mile. purchased used from a local dealer in California. The bike appeared as new and everything functioned at the dealer. We picked up the bike and trailered it to Alaska, trip to 8 days. When we took it out to ride it, it has a ruff idle below 2500 rpm, almost sounds as if it is running with the choke on or on 3 cylinders. Above 3000 rpm it seems to run fine. Plesae help, I am very mechanically inclined and have performed all my own break in tune-ups in the past and am not sure if this bike has had its break in service ?