Hello, I bought the Hurric Pro 2 exhaust for my Kawasaki Z750 R and installed it myself. Since the installation I have problems with the gas train. As soon as I give too much gas (almost full gas ) and from a turn of 6000/min the gas train flies away. As if I did not get any gas at all. However, if I turn slowly up to over 6000 I can drive relatively normal. Had also the error code F1, but only if I take out the DB Killer. Can you help me further? Here is the link from the exhaust http://www.ebay.de/itm/381499486967?… LG Matthias