no spark all of a sudden

[vista461]

So I had my forks off to put new seals on. The bike ran before I took them off. But when I went to go for a test ride it wouldn't start. It has no spark. Battery voltage is good. Is there anything in the handlebar controls like the kill switch or clutch interlock switch that may have had the wires pulled that would allow the engine to turn but not allow the plugs to fire?
I hope to check out the ignitor and signal generator tomorrow. Just looking for other options.

 

[tlepac]

Have you checked the wires under the tank for any loose ones? Did you have to pull on the harness when taking off the forks? Check the wiring diagram for clues would be my first step. Hopefully something as simple as a disconnect

Good Luck

 

[Suzuki_Don]

Is there anything in the handlebar controls like the kill switch or clutch interlock switch that may have had the wires pulled that would allow the engine to turn but not allow the plugs to fire?

There is usually a three way plug from the kill sw and starter button from RH switchgear that joins the loom wiring inside the headlight bucket. Check it has not come unplugged. Check your wiring diagram and you will see what I mean.

 

[vista461]

Have you checked the wires under the tank for any loose ones? Did you have to pull on the harness when taking off the forks? Check the wiring diagram for clues would be my first step. Hopefully something as simple as a disconnect

Good Luck

I didn't notice pulling on anything on the right/throttle side. But I did have to snake the left side stuff back under/through the fork since it ended up on the wrong side. lol I am pretty sure I have the clutch interlock switch back on correctly. It only lets the starter spin with the clutch lever in. I have the tank off and the fairing back off, and didn't see anything disconnected. But I can look again, just seems like an odd coincidence that one of the igition parts would flake out right now.

Hopefully I find a loose connection ,but that isn't my kind of luck.

 

[vista461]

There is usually a three way plug from the kill sw and starter button from RH switchgear that joins the loom wiring inside the headlight bucket. Check it has not come unplugged. Check your wiring diagram and you will see what I mean.

I will check that out , thanks

 

[Suzuki_Don]

Check for voltage at the coils while the tank is off and the ignition on.

 

[vista461]

Check for voltage at the coils while the tank is off and the ignition on.

Have 11.5-12volts at coils.

 

[vista461]

signal generator ohms out good, ht wires ohm out good, coils ohm out good, coils getting voltage. Ignitor on coil side has voltage. Multimeter on ohms on the sig gen side of the ignitor does not make spark .

Which leads me to think my Ignitor is shot, which of course is not a cheap part

Anything I missed to check? Or is that everyone else's conclusion as well?

 

[Guest]

signal generator ohms out good, ht wires ohm out good, coils ohm out good, coils getting voltage. Ignitor on coil side has voltage. Multimeter on ohms on the sig gen side of the ignitor does not make spark .

Which leads me to think my Ignitor is shot, which of course is not a cheap part

Anything I missed to check? Or is that everyone else's conclusion as well?

If you're sure you didn't knock something loose doing the forks? This makes the most sense if it ran before.
If not get a Dyna S.

 

[rustybronco]

signal generator ohms out good, ht wires ohm out good, coils ohm out good, coils getting voltage. Ignitor on coil side has voltage. Multimeter on ohms on the sig gen side of the ignitor does not make spark .

Which leads me to think my Ignitor is shot, which of course is not a cheap part

Anything I missed to check? Or is that everyone else's conclusion as well?

Your multimeter may not supply enough current when it's in the ohms position. try it again in the diode checking position.

 

[vista461]

Your multimeter may not supply enough current when it's in the ohms position. try it again in the diode checking position.

Same thing, nothing

 

[vista461]

If you're sure you didn't knock something loose doing the forks? This makes the most sense if it ran before.
If not get a Dyna S.

Didn't see anything disconnected or pulled out

 

[vista461]

Anyone know what other gs ignitors may interchange?

Maybe I'll try that HEI conversion

 

[rustybronco]

Does anything else not work like it has a missing ground connection. looking in the wiring diagram I didn't see a disconnect in the igniter circuit. can you check the voltage drop between the battery negative and the negative wire at the igniter.

inspect for a broken ground wire at the igniter...

link to wiring diag. http://www.mtsac.edu/~cliff/storage/gs/GS700_supplementary_service_manual.pdf

 

[vista461]

I'll recheck for a broken wire at the ignitor. Everything else seems to work, lights,blinkers,starter spins.

I'll check the voltage drop too.