I bough 99 hayabusa. Since I bought the bike when I ride it after 20 mins the bike will start cutting in and out on me like my throttle cables got cut. Let off gas and got back on and it was fine until a bit later when it happend again at about 4k. Maintained throttle position this time and after 3 seconds it power surges back on. Engine never shut off though. Just acted like i closed the throttle. I changed spark plugs and it didn't help. Bought power commander and it didn't work. Put the factory mufflers back on and it didn't work. I changed the ECU and still doing the same thing. I checked all the cables and the fuel pump and everything seems fine. What should I do?