Bad kill switch

[Guest]

Hello all I have a 1982 gs 750 I have a bad kill switch and I have by passed it. would that be the cause of why my bike only runs on cylinder 1&4
Thanks mike

[tom203]

Nope. The kill switch feeds positive 12 volt power to both ignition coils and then also feeds the ignitor, so if you bypass switch, the coils and ignitor should both still get the 12 volts. Your problem is at coil connections or in ignitor or connections from signal coils (these trigger the ignitor). Cylinder 1 and 4 fire together ,as do 2 and 3 .Have a look at this link

http://members.dslextreme.com/users/storagecliff/images/electrical_odd-n-ends.html#A17

[trucker]

That is what I thought thanks for the link

[seanarthurmachado]

Pardon my stupidity but why would you want to defeat a safety system (kill switch) instead of repairing it ?

[trucker]

Well cause I picked this bike out of a ditch from a friend house it is a project bike but i want to make sure she runs good before i put to much money and time into it there for why I have not bought a new one yet

[tom203]

Well cause I picked this bike out of a ditch from a friend house i.....

Ditch? Did you find a helmet too?
P.S. I haven't used my kill switch in four years
if bike fell on signal coil side, start looking there.

[trucker]

Lol helmet and body wait that is not even funny
So I switched coils from one side to other and got spark in the 2/3 cylinder so I am going to assume I have some bad wiring from coil to igniter

[JTGS850GL]

Or a bad connector, igniter or signal generator. Something downstream for sure.

[trucker]

I checked the generator and that checked in good but don't know how to check the igniter but I thought were I can get spark in one coil and then switch coil and get spark I figured I could rule that one out being bad but maybe not

[trucker]

I thought maybe running a straight wire from coil to the igniter would rule out bad wire do you think would rule it out

[JTGS850GL]

If you get ignition back, then that would do the trick. There are two connectors between the igniter and each of the coils.

[trucker]

So I tried running a straight wire to the igniter and I got nothing so I'm assuming I have a bad ignitor

[JTGS850GL]

Before you go out to buy another igniter, did you verify that you have +12V (O/W wire) at the other end of the coil? Just curious as to what procedure you used to verify the generators?

[trucker]

I watched how to do the test on YouTube don't remember exactly how I did it it ws done with my ohm meter how do I test the 12v from the Orange and white wires

[JTGS850GL]

Check for voltage at the coil end of the connector between the connector and ground. Check it with just the ignition on and then with the engine cranking over. Both coils should see close to battery voltage with ignition on and cranking. Expect the battery voltage to drop while cranking but should still be above ~9.5V.