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RPMs increase and decrease with blinker?

All things possible. Will be interesting to know, if not this, what cause is... Kentman, does anything happen different if twisting the throttle with brake on or brake off?
 
pdqford said:
Sorry, that’s not what I was trying to get at.
To use your terminology, I should have asked if the engine will “throttle up” when the brake light is on?

(Thinking you may have a marginal shared ground that is reducing current to the coils, but the ground improves with more current (i.e., brake light current) added to the ground. Any loose or cruddy grounds? Do you have the wiring diagram?)
Click to expand...

Yes. The engine does throttle up with either the front or rear brake engaged.

I’ve been combing through the service manuals for any type of wiring diagram. Not too much luck. I don’t know what I’m looking for, so it’s difficult.

that’s the thing. All the wiring is in great shape. Nothing has stuck out to me. Obviously I’m missing something.

can you post videos to this forum? Or just pictures?
 
I will check the voltage at all those points in the next few days.

I will check back here for the results.
 
Let ma ask this way, When you push the brake, does the eng. rpm. go up automatic, without turning the throttle? Or after pushing the brake do you got to turn the throttle to get the rpm's to go up? Also while pushing the brake, does turning the throttle work as it should, can you turn it and make rpm go to 3K or 4K rpm.?
 
rphillips said:
Let ma ask this way, When you push the brake, does the eng. rpm. go up automatic, without turning the throttle? Or after pushing the brake do you got to turn the throttle to get the rpm's to go up? Also while pushing the brake, does turning the throttle work as it should, can you turn it and make rpm go to 3K or 4K rpm.?
Click to expand...

Yes. When I engage any of the brakes, blinkers, high beams etc. the engine RPMs go up without engaging the throttle. As far as the blinkers ago, when the blinker flashes on the RPMs go up, I’m with the blinker flashes off the RPMs decrease.

At no point does the throttle on this bike work. At no point does the throttle increase the RPMs, No matter if the brake system is engaged or not.


The bike will idle perfectly.
 
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I am fascinated with this thread. Cant wait to find out how this is resolved.
eVCYCZHm.jpg
 
Kentman7 said:
I will check the voltage at all those points in the next few days.

I will check back here for the results.
Click to expand...

Looking forward to seeing your results.

Is the charging system all stock still? Maybe any load on the electrical system causes the voltage regulator to let too much current through overloading the system. It is common for the regulatorsto fail, but usually results in a cooked stator and overcharged battery, not what you're describing.
 
Kentman7 said:
Yes. When I engage any of the brakes, blinkers, high beams etc. the engine RPMs go up without engaging the throttle. As far as the blinkers ago, when the blinker flashes on the RPMs go up, I’m with the blinker flashes off the RPMs decrease.

At no point does the throttle on this bike work. At no point does the throttle increase the RPMs, No matter if the brake system is engaged or not.


The bike will idle perfectly.
Click to expand...

Find the grounds and clean them. pg 224 of the FSM Wires amy also be damaged. There's a section in some harnesses used on GS bikes that have several wires spliced roughly with steel ( by now rusted ) clips.

Also is the airbox filter and exhaust installed? not directly related to the weird electrical issue but a much needed reality.

manual is here https://gsarchive.bwringer.com/
the wiring diagram is inside and yes they are had to follow but it seems the bike is using the signals presumably sufficient ground when the circuit is closed.
 
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Kentman7 said:
Yes. When I engage any of the brakes, blinkers, high beams etc. the engine RPMs go up without engaging the throttle. As far as the blinkers ago, when the blinker flashes on the RPMs go up, I’m with the blinker flashes off the RPMs decrease.
.
Click to expand...
How about if you press the horn button
Do the engine RPMs go up?

(The black and white wiring diagram makes my eyes hurt,
but I think we are chasing two separate issues.)

Why is there what I would call a "jumper wire" between the headlight ground wire and the front turn signal lights ground wire, since those two ground circuits already meet up after they pick up the ground side of the horn switch?

Interestingly enough the R/R and the Ignitor box are spliced into this same ground wire!

AND this ground wire is spliced into a wire, of which EACH end goes to a ground!

I gotta rest my eyes, but one more question:
What is the difference between a ground symbol where the little dash lines of the ground signal form a triangle and those that form a rectangle?
 
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It was a bad voltage regulator!

Fucking Christ.

I switched the voltage regulator to a new one and it solve all the problems on this thread. Even the supposed “carb problems”.

the bike is idling and throttling great now!
 
Great Kentman, Glad you're up and going and pretty sure if any of us confront these problems in future, we'll remember what you've shared with us... Congrats and thanks... Though I still don't see how spark has anything to do with raising rpm,
 
I’m hesitant, but I’ll ask before anyone else does. What new voltage regulator did you use?
 
Burque73 said:
Looking forward to seeing your results.

Is the charging system all stock still? Maybe any load on the electrical system causes the voltage regulator to let too much current through overloading the system. It is common for the regulatorsto fail, but usually results in a cooked stator and overcharged battery, not what you're describing.
Click to expand...

You were right!

thank you for your help.

I really appreciate everyone’s help in this issue. Thank you all!
 
That's great, Kentman, how weird though. Like Rich asked, which regulator did you use? There are a few that will work, some (or one in particular), are better than others.

So glad you got it running!!
 
So basically what was happening is the voltage regulator was not working. Yes. But why were the RPMs going up every time I engaged and electrical system on the bike?

I think what was happening was when I tried to throttle up the bike, the coils and spark plugs weren’t receiving enough voltage to increase the RPMs. But, at the same time, the bike was still getting adequate fuel and air through the carb.

When I engaged the brakes or the blinkers the voltage would increase to my coils and spark plugs and cause RPMs to increase and the engine to rev up ( or in case of the blinkers, rev up and down).

But it wasn’t just the coils and spark plugs receiving the extra voltage that increased my RPMs, it was also because my carb throttle valves were adjusted to idle in high RPMs.

so, when the voltage increased, the system had enough fuel and air mixture to increase the RPMs.

does that make sense?
 
You need a bigger explosion in the cyl. to make the piston go down faster, to increase the rpm. I've always thought all the spark does is ignite the fuel, once the fuel is ignited, neither a weaker nor stronger spark would affect the speed nor power of the combustion of the fuel air mixture... Heck, you could put 5 spark plugs in a cyl. to ignite the fuel but I don't think it would affect the speed nor power of the combustion... Kind'f like putting 4 blasting caps in a stick of dynamite, the explosion would be the exact same as when using only one.
 
Kentman7 said:
So basically what was happening is the voltage regulator was not working. Yes. But why were the RPMs going up every time I engaged and electrical system on the bike?

I think what was happening was when I tried to throttle up the bike, the coils and spark plugs weren’t receiving enough voltage to increase the RPMs. But, at the same time, the bike was still getting adequate fuel and air through the carb.

When I engaged the brakes or the blinkers the voltage would increase to my coils and spark plugs and cause RPMs to increase and the engine to rev up ( or in case of the blinkers, rev up and down).

But it wasn’t just the coils and spark plugs receiving the extra voltage that increased my RPMs, it was also because my carb throttle valves were adjusted to idle in high RPMs.

so, when the voltage increased, the system had enough fuel and air mixture to increase the RPMs.

does that make sense?
Click to expand...

No.................
 
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