GPz Non starter....

[Chris45]

Really need help with this one guys, it's got me totally baffled. Posted the original question last week but here's a summary.

1997 GPz 500 S, 35k on the clock.
Driving along perfectly okay when the engine suddenly cut out. All lights, indicators, horn etc are FINE. No problems. Plenty of petrol.
When I press the starter button all I get is a rapid clicking noise from the starter relay.

Have replaced the starter relay with a new one AND replaced the regulator/rectifier thinking that was the problem. It isn't.

Have checked all the cables/connectors at the relay up to the main fuse box, all okay and I have also checked all the fuses, including the main fuse mounted on the relay.

So I'm rapidly running out of options. Any suggestions gratefully received.

Cheers

Chris.
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Honda CG125>Suzuki GT185>Honda CB 250N>Suzuki GSX400>Honda CX500B>Kawasaki GPZ305> Kawasaki GPZ550>Kawasaki GPZ500S+BMW 650GS

[pompousporcup...]

Assuming you've checked the battery voltage?

[Nobby the Bastard]

Have you tried a jump lead from the battery directly to the starter to discount all the wiring in between?

And have you tried jumping it from a car.

(And before anyone say it'll hurt it to use a jump from a car, thats bollocks. 12v DC is 12V DC.)
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[stinkwheel]

Shorting between the two terminals on the solenoid with a metal object should turn the starter motor over regardless.

Does it?
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Rogerborg]

I'm not seeing a confirmation that you've checked the main earth strap to the engine, so I'm sitting pat on that diagnosis.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Nobby the Bastard]

The sudden dying makes me think it's the clutch/stand switch causing the problem.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[Chris45]

[stinkwheel]

The ignition switches can partially fail on those bikes. I've had three go in such a way as it gives you all the dash lights and turns over the ignition but no spark.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Chris45]

Four weeks off the road with this problem and it's driving me insane

Have replaced the starter relay with a new one AND replaced the regulator/rectifier thinking that was the problem. It isn't.

Have checked all the cables/connectors at the relay up to the main fuse box, all okay and I have also checked all the fuses, including the main fuse mounted on the relay.

Installed a known good junction box (thinking it may be the relay diode, it isn't). Totally fucked at the moment, absolutely no closer to resolving this problem, exactly the same issue - Press the start button, starter motor turns over for about 2 seconds and then the starter relay makes a loud clicking noise. Battery is okay, electrics tested with a voltmeter and for circuit continuity, everything is fine. New rectifier, new starter relay, all lights etc work perfectly. What the fuck ???????
____________________
Honda CG125>Suzuki GT185>Honda CB 250N>Suzuki GSX400>Honda CX500B>Kawasaki GPZ305> Kawasaki GPZ550>Kawasaki GPZ500S+BMW 650GS

[Nobby the Bastard]

[Chris45]

Yes and yes

Battery also fully charged and checked, also did some further circuit tests this morning checking for short circuits between the battery, starter relay and starter motor. Everything is absolutely spot on, really good connections, strong signal from the circuit tester, bike is always dry stored etc. Methinks it will be going for spare parts soon...
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Honda CG125>Suzuki GT185>Honda CB 250N>Suzuki GSX400>Honda CX500B>Kawasaki GPZ305> Kawasaki GPZ550>Kawasaki GPZ500S+BMW 650GS

[Nobby the Bastard]

[Chris45]

Side stand switch. I had drained the battery below its minimum for cranking too. Rewired the switch, charged the battery and double checked all the wiring - engine burst into life first press of the button
____________________
Honda CG125>Suzuki GT185>Honda CB 250N>Suzuki GSX400>Honda CX500B>Kawasaki GPZ305> Kawasaki GPZ550>Kawasaki GPZ500S+BMW 650GS

[Nobby the Bastard]