I have an '09 AVL deluxe with about 10K mileage. Except for a sprag and speedo failure I've had no issues in 5 years. Stock except for Goldstar exhaust (and one size upjet). Usually a one kick startup with no choke above 45 deg F. Recently, if shut down for a few minutes when the bike is hot, it is difficult to start. I've got it started by changing the plug on the spot, but the same symptom occurred within a week with the new plug. The plugs appear to be slightly on the lean side, but acceptable, and the bike runs great at all throttle positions. If left for more than 15 minutes, it starts fine. Also, it occasionally kicks back during the start process, so there appears to be spark. Any ideas on the cause are appreciated.