Well thats me had my XTX for a year now after getting rid of the ZX9, after I bought the XTX I discovered it had a DNA filter and a PCIII fitted and then joined this site, the surging was bad but after reading about it on here i just put it down to the ECU. In a moment of technical genius lol, I decided to dig out a camera lead and plug the PCIII into the lap top to have a look. The map loaded in was for a standard bike and mine has the DNA filter, Quill pipes with baffles removed and also intake snorkel removed, I changed the map for something a bit more suited and the result is I have a new bike. WOW, the difference is amazing and this is what I expected it to be like a year ago. This along with my recently fitted maxxis supermaxx tyres mean I am going to have a good summer this year.