Update and recap of problem: Bike has always run fine. Problem was with low fuel light. Warranty was getting ready to run in March 2010 so i took it to have this repaired under warranty and here starts the problem. March- replaced fuel pump module and this took car of fuel light. However notice bike was running lien so I took it back under warranty. THey confirmed lien and said it was due to the stage one download so they recommended race tuner and I agreed. They did have to dissassemble top end to confirm no damage due to lien running and all ck out ok. They tuned with race tuner. I picked it up and notice that it hesistated once in a while, I brought it back and they retuned it. Still noticed hesitation so they tuned it a 3rd time. Then hesitation became worse so they replaced injectors and no change, then map sensor and no change then crank position sensor and no change. They have never been able to reproduce the symptoms but are taking my word for it.--another story in itself. Problem is intermittent it will hesitate slightly on accelerating and struggle slightly here and there while riding. If you sit at traffic light for over 60 seconds and then accelerate at normal pace it will sometimes stumble very hard. When it is cold it is more consistent and less random. At 125 degrees I can get it to stumble everytime I stop and waite for 60 to 70 seconds. After 150 degrees it will become more random and only do it slightly. (cant figure why shop hasnt been able to replicate though) I believe it to be a problem with fuel pump module since that was a new part and it never ran bad prior to this but it could be an ECU issue also. Shop says however that fuel pressure is ok. Shop has it again and I gave mechanic explicit instructions how to replicate problem. Either way he is replacing the fuel pump assembly and I will pu again tonight. Here is my question, if it is not fuel pump then could there be an issue with the ECU from the Super Tuner? Or could there be some issue with the voltage to coil? Some other electrical issue since some of this had to be taken apart when they pulled top end? By the way I checked all fuses, ground and electrical connections and all were fine. I also put a spark tester and verified equivilent volts to each spark plug. Plugs are burning the same as well and plugs were new in march, bought from HD.