A little help here please. Have a 1995 KTM 620 RXC. bike has just over 4,000 original miles and runs great. Kick it over a couple times and ride. Gobs of power. but I have no lights. I have checked the blubs and all the bulbs are good. Nothing works, no horn, no signals, no headlight or tail light. What are the common problems with this bike that would cause none of the lights to work?