GSX750ESD Getting Wierd

[Grumph]

There's a well known mod for elderly bikes with voltage drop problems. Simply insert a relay so that the switches - ignition and or kill switch - activate the relay and send 12v direct to the coils. Gets rid of the voltage drop through old switchgear.

[Dak S83]

There's a well known mod for elderly bikes with voltage drop problems. Simply insert a relay so that the switches - ignition and or kill switch - activate the relay and send 12v direct to the coils. Gets rid of the voltage drop through old switchgear.

Good idea and yup, done that before on cars.

[Dak S83]

Part of washing my bikes involves blowing out the switchgear with compressed air, followed by a ride of up to 100kmh for a few minutes.

Yea mate, that's what I usually do as well, as well as draining the carbs if it's going to sit for a long time, which I didn't bloody do on my other bike due to me getting real sick, ie nearly dying. So now have that bike to do a carb clean on as well, and that's a nightmare to pull the carbs on, 2006 S83

[SaferRides]

There's a well known mod for elderly bikes with voltage drop problems. Simply insert a relay so that the switches - ignition and or kill switch - activate the relay and send 12v direct to the coils. Gets rid of the voltage drop through old switchgear.

I've done that for the headlights on the R1. There was almost a 2 volt drop from the battery to the headlight relays. There is now 13.7 V at the bulb holders - I can actually see where I'm going at night!

Sent from my SM-G950F using Tapatalk

[sidecar bob]

I have to ask, did you use a voltmeter or ohms meter at any point during this diagnosis & repair?

[jellywrestler]

those blue connectors are for 2.5mm cable, red for 1.5, mistake right there. it's the old story, most electrical faults are mechanical faults.

[Dak S83]

I have to ask, did you use a voltmeter or ohms meter at any point during this diagnosis & repair?

Yea mate, I have 3 of the buggers, thats the wierd thing though you see, everything checked out, there was little resistance between the kill switch terminals, voltage shown at the igniter and coils was only down about .4 of a volt compared to actual battery voltage which I put down to wiring loom resistances, the only real wierd one which got me on track was the big voltage drop to the coils and igniter while cranking which put me on the track that the starter was stuffed, which it isn't, drawing to much current but, buggered if I know, it seems the kill switch clean did the trick. As long as it stays that way when I get the carbs back and assemble it all again.

[Dak S83]

Ahh, thats a bit better than the previous abortion. Now there is no resistance at all from the positive terminal all the way to the igniter, same with the earth. Just gotta get the carbs back now, they weren't ready for the weekend damn it.