Static timing with test light


Information and questions on GL1100 Goldwings (1980-1983)
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Tipsy McStaggers
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Static timing with test light

Post by Tipsy McStaggers » Tue Oct 09, 2018 10:05 am



If you set the engine at f1 with the ignition on, will it trigger one or more of the coil lead wires to check and see if your poles are alligned? If so which wires?



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virgilmobile
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Re: Static timing with test light

Post by virgilmobile » Tue Oct 09, 2018 11:35 am

No.It has to rotate to trigger the pulse coil.
If you are unsure , the bikes wiring is color coded from the pulse coils all the way to the ignition coils.
The only other way is to use a timing light attached to the #1 plug wire and watch it flash at the f1 mark.
As far as the wiring.one of the pulse coils have a yellow wire...it goes to one spark unit..that spark unit harness also has a yellow wire...it feeds the ignition coil #1

Tipsy McStaggers
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Re: Static timing with test light

Post by Tipsy McStaggers » Tue Oct 09, 2018 11:51 am

10-4. Guess I'll try and rig a lens for the site hole.

Tipsy McStaggers
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Re: Static timing with test light

Post by Tipsy McStaggers » Tue Oct 09, 2018 12:03 pm

Just wanted to double-check timing, having carb issues after rebuild. Had to Frankenstein a rack from 2 w/ broken carbs. Found a full rack from an 83 that looked good on eBay for $100. Going to start over with that rack, also think I'm on the right track with charging system, reworked the stator to reg/rec and voltage went up to 13volts, going to do a direct solder on the rest of the connections, hopefully that gets it over 14v.

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virgilmobile
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Re: Static timing with test light

Post by virgilmobile » Tue Oct 09, 2018 12:18 pm

For timing..if you really wanted to check..drain a quart of oil out(so it won't splash in the hole so much)..just crank it with no intention of starting the bike.
If all the parts are secured,it should be on the money.Remember about the vacuum advance system too.
The timing,as I recall,is set to 10° BTDC..the mechanical advance moves it to (around )23° BTDC..and the vacuum maxes it out near 32° BTDC.
Also there's no vacuum on the line at a idle..it will pull about 5" at 3500 rpm.

Tipsy McStaggers
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Re: Static timing with test light

Post by Tipsy McStaggers » Tue Oct 09, 2018 12:48 pm

So, with the engine simply spinning and my test light attached to #1 I'll see the f1 mark line up in the hole? If I apply vacuum what mark lines up or will I just see it move? Guess I can run the fuel out of the bowls to keep it from firing, eh?

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virgilmobile
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Re: Static timing with test light

Post by virgilmobile » Tue Oct 09, 2018 1:30 pm

Not a test light (12 volt test light)..A ignition timing light..there usually a strobe lamp.
Yes just spinning the engine with spark it will show up at the f1 mark and should you apply 5" of vacuum it will,or should move it further off the mark changing at the vacuum changes.

Tipsy McStaggers
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Re: Static timing with test light

Post by Tipsy McStaggers » Tue Oct 09, 2018 1:38 pm

10-4, I meant to say timing lite. I have one. Thanks

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virgilmobile
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Re: Static timing with test light

Post by virgilmobile » Tue Oct 09, 2018 2:05 pm

If you have a hand vacuum pump like used for bleeding brakes,you can hook it to the vacuum advance canister...pull about 5" of vacuum and see if it will hold it for a minute or so without bleeding down.Mine did not..the diaphragm was bad...pain to replace.

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virgilmobile
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Re: Static timing with test light

Post by virgilmobile » Tue Oct 09, 2018 2:13 pm

I did get mine fixed and hand marked a "timing wheel marker" to one of the cam gears..checked the mechanical and vacuum advance against it.
They were white nail polish marks on the gear at 0° (tdc)..10°..20° ..and 30°..btdc
Pretty cool to watch when revving the engine.
I was boored.

Tipsy McStaggers
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Re: Static timing with test light

Post by Tipsy McStaggers » Tue Oct 09, 2018 2:18 pm

I have one and that was my plan. I can hear it advance when I unplug and plug in the vacuum hose when it's running. Am curious to see if it holds vacuum.

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Re: Static timing with test light

Post by Tipsy McStaggers » Sat Oct 13, 2018 1:33 pm

I checked my timing and with the timing light hooked up to #1 cylinder and the f is lining up below the engine marks and it's actually closer to lining up with the 1. I tried it with the vacuum line hooked up and disconnected and I applied some vacuum, all with the same result. This is with the engine just spinning, not running. Is this advanced or retarded?

Tipsy McStaggers
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Joined: Thu Jan 04, 2018 10:45 pm
Location: Atlanta, Ga.
Motorcycle: 1980 GL1100

Re: Static timing with test light

Post by Tipsy McStaggers » Sat Oct 13, 2018 6:47 pm

Ok, went ahead and pulled the engine again and figured out the problem. The poles were lined up perfectly, but the rotor wasn't seated completely into the weights. It was just riding on top, didn't think it felt right when I was putting it back together. You have a brain fart with this bike you pay the price! Put vacuum on the advance and it engages but doesn't hold. How long should it hold open?

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virgilmobile
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83 GL1100 I
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84 GL 1200 I

Re: Static timing with test light

Post by virgilmobile » Sat Oct 13, 2018 8:44 pm

The vacuum canister should hold forever when new..There's probably a crack or pinholes in the diaphragm.It may still work but won't last forever.
If you repair or replace it..first scribe a mark between the casting and the pulse coil plate for a timing marker.



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