Almost forgot, your throttle cables are binding as you turn your handlebars to the right, which is the surge you heard in your motor. Make sure those cables are properly routed. The problem can also be rectified by re-routing those cables to the right side of the frame.

2004 TA/19'slash cuts/150/45/N3RF TBS needles,no shims/2 1/2 turns out/FZ1 springs/clean balanced carbs/pods/18/44/EK chain/TBS cush drive/Commander IIs/Armstrong GG pads/TTP firestarter/TTP safe start/green springs/Pretech 6 pot/Ricors