gt80 no spark

75 Yamaha GT80 B discussion forum:


gt80 no spark

gt80 no spark 
herman said 2017-10-23 18:03 
 
Trying to fix up my old Yamaha gt80 for my Grandson. Worked great when I parked it 25 years ago. Replaced battery, coil plug and Diode but still no spark. It´s driving me crazy. Pulled the kill wire, no help. Wiring harnesses in really good shape so doubt the problem is there. Had to open a couple to trace wires and wiring was in perfect condition. Hoping not to have to tear into the switch. Horn works with key on. Is there a way I can track it down by voltage? I have a wiring diagram but it doesn´t have voltages I can confirm? Any suggestions would surely be welcome! 
 
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