Join Date: Jun 2008
Location: Moraine, OH, USA
The starter running with the bike turned off is a fairly common K issue. If the battery is low the starter relay contacts can weld together. Sometimes you can fix it with a good rap to knock it loose (it's under the tank, in a covered box, the relay has 2 heavy lugs going into it)
Don't know about the other problems, could be a dead battery or I think the starter has a shed circut that cuts out the headlight when the starter engages.
1987 RED K75S