I don't think it would be the regulator, because the lights work when it's running. That means it's charging.
umm..correct me if i'm wrong helmut..butttttt....the reg/ret only converts the ac voltage from the stator to dc..and recharges the battery if it's discharged..if his lights are working when he pull starts..or kick starts his bike..this only means his stator is putting out the volt to the reg/ret..then going to the lights and so forth..sounds like he's not getting power from the battery to the wires in his handle bar to me..all the bikes i've worked on..if i kick start or pull start..this tells me the stator and reg/ret is doing it's job..oh..in case your wondering..all stators on all atv's from what i've been told by my honda machanic..they put out ac current..and the reg/ret converts the power to dc..just thought i'd throw that out there

..he needs to check the power from the battery to key switch..then from there..to his kill switch...the stator is working from what he's telling us..and so is the reg/ret..i would trace the wires from the battery to the key switch..then trace it from there.
Yeah, the stator generates AC voltage and the rectifier rectifies it to DC and the voltage regulator keeps the voltage constant at around 14 volts. And yeah, if the lights are working when it is running, then it's charging and I don't think it would have anything to do with the regulator/rectifier.
I think he said he had power to the key switch, so I would start on that side of the key switch and go from there.