08 1200c. Had warranty work in last few weeks. Ran too lean so they removed top end to inspect and all was ok. They used Supertuner to retune the bike. Now from time to time it misses and sputters when first take off from a redlight. Doesnt do it all the time. First showed up as a stumble and now it actualy pops and sputters. Not aware of any smoke or at least no one has commented on it. Plugs are both clean. Is this a tuning problem or could it be a sensor issue. I did check all the easy to get to connectors, all installed properly and all clean inside.