27-05-15, 07:13 PM
Noggy, it could be the ignition switch which has 2 wires that supply an earth to the ECU, without this earth the ECU will not work. The earth is taken from the neutral switch and/or the side stand switch up through the ignition switch and back to the ECU..
The fact the engine turns over on the starter rules out the side stand switch as it also supplies the earth for the starter circuit.
A few questions to narrow it down
Does it happen with the bike in neutral?
Does the neutral light work?
Does the neutral light still work, when this happens?
Does it happen with the bike in gear side stand up and the clutch pulled in?
Check the wiring from the ignition switch to ensure there is no corrosion in the plug under the tank. It does not take much corrosion to cause the problem. Has anyone on the forum taken one of these switches apart? (I have not seen the inside of one) as it may have a resistor like the Suzukis have to prevent hot wiring. If not you could bypass it the next time it happens and if it starts change the switch.
How proficient are you in using a meter? you could test the wires of this circuit to ensure good continuity.
The fact the engine turns over on the starter rules out the side stand switch as it also supplies the earth for the starter circuit.
A few questions to narrow it down
Does it happen with the bike in neutral?
Does the neutral light work?
Does the neutral light still work, when this happens?
Does it happen with the bike in gear side stand up and the clutch pulled in?
Check the wiring from the ignition switch to ensure there is no corrosion in the plug under the tank. It does not take much corrosion to cause the problem. Has anyone on the forum taken one of these switches apart? (I have not seen the inside of one) as it may have a resistor like the Suzukis have to prevent hot wiring. If not you could bypass it the next time it happens and if it starts change the switch.
How proficient are you in using a meter? you could test the wires of this circuit to ensure good continuity.