Sam, I can appreciate the fact you are trying to diag this as much on your own to save money. I do the same thing. If I can fix it myself I will. I feel like you are going to keep spinning your wheels and become exhausted in trying to remedy the problem. Spend $50.00 and take the bike to a local dyno with a good working wide band and get some A/F readings in the trouble areas. Hell I would ask the owner of the dyno to let you ride the bike so you can show him where the problem is. Unfortunately I am not aware of a data logging solution for you to watch timing when this problem is occurring. Take Mango's advice and get a TRE on the bike. Then report back to us with some A/F readings. I swear if you were closer I would consider strapping down the bike free of charge just to get some A/F readings. It is a possibility we may not see anything wrong with fueling in the troubled areas. Then again wouldn't it be nice to know if fuel delivery is the problem???? I guess is amazes me at times what people are willing to spend on various accessories for a bike or even the cost of a bike. However when it comes to tuning they would rather have poor ridability or performance then to spend a little more money in getting their bike to run correctly. Not trying to sound like a salesman here and get you in the door. Sport bike owners are smallest customer base these days. I may be lucky to see 1 to 2 a month. I would like to do more of them simply for the fact that I like them. Harleys make up for 90% of my business now on the bike dyno. However the bike dyno does less then 20% a year of the car dyno. Like I said not trying to sell you on your tune to get your business. I am trying to help you get your bike issues resolved. I am not telling you that you need to come see me and me only to get your bike fixed. Find a good dyno shop that can get you some solid info to what is going on with your bike. Mango has said several times how a tune has made his bike run better then it has ever ran before. Do a search for me on the forum and you will see a number of people reporting back with noticable differences after a tune from me. So go spend $50.00 bucks on some pulls and think of it as a diag fee to help you find out what the problem is.
