YZF750R 1996 after 4,000 RPM no power HELP

[santos performance]

--------------------------------------------------------------------------------<br> Hi <br>I am from Puerto Rico My Yzf 750 is 96 and the bike start fine but when you need to start a ride and you push the throttle you lost the power and the engine stop ,start again whit little trouble , i removed the tank and see that the gas coming out of the carbs ,we change the pick-up coil ,the ECU and syncronuize the carbs but the problem persist ,Does anyone have this before ?<br><br>Help ASAP<br><!--EZCODE EMOTICON START :evil --><img src=http://www.ezboard.com/images/emoticons/devil.gif ALT=":evil"><!--EZCODE EMOTICON END--> <p></p><i></i>

[creed12r]

It sounds like it could be a problem with the EXUP motor or wiring to it, I do know that if you disconnect the EXUP motor wiring at the ECU the bike will not rev past 4-5000 and sometimes dies.<br> good luck<br> chris <p></p><i></i>