Hi i need some help brought nc30 for me to go to and from work. Bike went well. Then decided to take it for a 100 mile ride on way back died as soon as i put lights on . Found out battery was dry as a bone changed that and regulater. Still having same problems it keeps dying on me if i turn lights on but occasionally it works when they r on . Im not mechanically minded but will try is there any vfr mechanics in the southend area or any suggestions what could be wrong would be so greatfull for your help please thanks

"Found out battery was dry as a bone", some battery technologies are dry. An intermittent short in the lighting circuit could prove difficult to find, do you have a multimeter. One common wiring issue is pinched wires in the loom that runs to the handle bar switch. Is the problem more likely to occur when applying full lock.

It happens even when im going in a straight line but thank you

I assume lights on was low beam. If you press and hold the passing switch does it cause the engine running problem. Perhaps a relay fault, if a UK model NC30, you could try swapping the high beam relay for the low beam relay. If an import, check that the correct headlight bulbs are fitted, incorrect bulbs can damage the wiring/handle bar switch and cause problems.