My '85 will grind away ob the starter. The situation; key ON, starter button NOT depressed, when I turn the emergency kill button ON the starter starts to run. The only way to stop it is to turn the emergency kill button OFF.
So I checked the starter button...no continuity when not depressed
Next I checked the starter relay...no continuity across the "power" contacts.
So the starter relay must be getting energized through the starter circuit cut-off relay?????(#42 on the Yamaha circuit diagram)
This should be easy to track down..Just where the hell is this relay located? I'm open to other ideas on what to track down. I was hoping that this would be easy....duh....
G'day Motofun,
I believe it's part of the flasher unit, which you can't repair but you could install another relay using those wires,
LHS just near the fuses.
I'd still be checking starter button.
Does it try and start without the clutch in ?
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Thanks, it was right there under my nose! Now is just need to fix my multimeter.... (Pulled a wire free from it's pin connector) :dash2:
Finally got my multimeter fixed....next question, Does anyone know if relay #42 (starting circuit cut-off relay) is normally open when not energized? It seems like it should be that way. I have continuity across those pins so I'm thinking that's the culprit.
The contacts are open until the coil is energized.When the key switch and kill switch are on the red/white wire to the coil has 12 volts . Then if the clutch switch or nuetral switch are closed the black/yellow wire to the coil has a path to ground energizing the coil and the contacts close.
Now when the starter switch is pushed 12volts is supplied to the stafter relay coil through the blue/white wires through the cut off relay contacts .
As above, normally open, diagram shows that too.
Another possibility is a Starter solenoid that has failed closed.
I recently diagnosed and repaired my brother's 1999 Suzuki TL1000R for the same starter issue.
Fred
Quote from: T Legg on November 11, 2025, 11:19:42 AMThe contacts are open until the coil is energized.When the key switch and kill switch are on the red/white wire to the coil has 12 volts . Then if the clutch switch or nuetral switch are closed the black/yellow wire to the coil has a path to ground energizing the coil and the contacts close.
I was wrong when I said this.
(Now when the starter switch is pushed 12volts is supplied to the stafter relay coil through the blue/white wires through the cut off relay contacts .)
The starter relay coil 12 volts comes straight from the battery so its always hot. the blue/white wire is connected to the ground side of the starter relay coil and then to the cut off relay contacts.When the cut off relay contacts close the blue/white wire connects to the starter switch which when pushed connects to ground and runs the starter. The fact that turning the kill switch off stops the starter shows the cut off relay is working. That means the problem is after the cutoff relay.
A nick in the wire insulation shorting to ground could cause the problem. The blue white wire goes to the starter switch but also goes to the diode block so a nick could be any where along the way.