Hi all, i dont come on here often except to help my friend with his mc21 nsr250.

Awhile ago he put it away after a ride and had trouble starting it the next morning.
We had a good look over it today but werent able to pin point the issue, heres what it is doing:
http://www.youtube.com/watch?v=b1iDz0SyPgc

Its also running really badly, really sluggish throttle and back firing on both cylinders.

Ive pulled the carbs apart and cleaned them up, replaced rectifier, tried a different battery and cleaned all of the coil connections.

Im starting to think there is an issue with the ecu or stator, can anyone point me in the right direction?