Let me start with: BigGun full exh., 165/55 jets, 13/48 on the sprockets, foam filter in the box which is opened up. I have not ground off the stop on the air/fuel screw so the bike is running rich right now, not enough to foul plugs, just smells really strong. Now. If I start off running it hard it will smoke like a freight train, but if I start off on an easy ride, taking it through the gears without high revs, it won't smoke. I'm stumped as to if i burnt the rings being too rich, or beat the hell outta the valves/seats. I have no loss of power. I run 10w30 oil. Honda filters. No engine noise, valves or otherwise. Throttle response is a little sluggish, maybe due to not drilling slide to 5/32, but nothing to whine about. The bike is used weekdays 50miles a day on secondary roads to work, 50 to 70mph. Weekends, tight woods riding. It started smoking one day so bad I could hardly see the cars behind me! Then other days none at all, or maybe a little on decel.