Posted December 31, 200816 yr Recently got a 74 dt125a and no battery and cables not hooked up to anything. I have brand new battery fully charged and the negative or ground cable is easy--but the positive cable is my problem. I even have the original Yamaha factory service manual and wiring diagram but it's somewhat vague--at least for me.. There is the Starter Switch--to which the green wire from the starter dynamo (from the contact points) is attached at one of the studs with washer and nut.. The positive is actually split into two parts--one red wire going into the big wire harness but the second part is a connector looking to be connected to I think the starter switch. But Where? When I ground the negative cable, the neutral light comes on but no spark. Just wonder what the posive battery cable connector is supposed to do. Again--the battery is good. I have a tester. And what is the Main Switch that I see in the manual??
December 31, 200816 yr Recently got a 74 dt125a and no battery and cables not hooked up to anything. I have brand new battery fully charged and the negative or ground cable is easy--but the positive cable is my problem. I even have the original Yamaha factory service manual and wiring diagram but it's somewhat vague--at least for me.. There is the Starter Switch--to which the green wire from the starter dynamo (from the contact points) is attached at one of the studs with washer and nut.. The positive is actually split into two parts--one red wire going into the big wire harness but the second part is a connector looking to be connected to I think the starter switch. But Where? When I ground the negative cable, the neutral light comes on but no spark. Just wonder what the posive battery cable connector is supposed to do. Again--the battery is good. I have a tester. And what is the Main Switch that I see in the manual?? The main switch is the keyed switch. one of the positive wires go to the starter switch the other to the starter button.
December 31, 200816 yr I presume your problem is that the bike will not start? Have you checked for a spark?
January 1, 200916 yr Author The main switch is the keyed switch. one of the positive wires go to the starter switch the other to the starter button. Yes--but quite simply--where on the starter switch--there are two studs with nuts--which one do I hook the positive battery cable to???
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