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Low voltage- high ignitor current GS550T

  • Thread starter Thread starter autko
  • Start date Start date
A

autko

Guest
Hello

Have rather typical problem- low voltage on idle in my GS550T. Performed stator measurements and it seems pretty ok (as per manual). So decided to measure current flows to establish what is the main load. It turned out that it's ignitor unit- it draws ca. 3,3Adc when the motor is not even started. This explains why it's discharging so fast when ignition switch is on. Would like to mention that the same results were obtained with both ignitor devices that I have (one mounted and one spare).

Have anyone measured this before as with such a load (ca. 38W of const. power consumpion) it's no a surprise that baterry is dead when commuting in coty traffic (lots of idling when waiting for light change or slow ride in traffic....). Any solutio/proposal/upgrade?
 
That seems normal.

When the engine is not rotating the ignitor is grounding one of the coils as if it is just about to fire that coil and its holding that one transistor in the ignitor ON the whole time and that is what is drawing all the current. If the engine started rotating then it would release that one transistor and fire the plug.

But while its running its not going to be drawing that kind of current.
Its going to be turning on and off so fast that its effectively going to be drawing less than an amp.

Your problem is elsewhere I'd say.

At idle you should be able to charge the battery and power the entire bike with almost 3-4 amps to spare.

With the ignition OFF you should see what your bike is drawing from the battery. With it running and the regulator disconnected you can then measure the current the ignitor is drawing.

Also you can measure the current the regulator is outputting to see if its actually putting out more or less than the bike is drawing.
 
Last edited:
ok- checked few things based on the replies. One winding withing the stator is fault (delivering only 30Vac at 5k rpm with no load...) although it has correct resistance value.

So now either trying to rewind this or find another stator in good condition. Will see but option 1 is more probable due to very low number of those bikes here in Poland...

For a time being- must drive with at lest 3k RPMs and avoid long idling- otherwise, based on my measurements the battery is being discharged (at ca. 2200 I had a point of zero current flow at battery).
 
autko said:
Hello

Have rather typical problem- low voltage on idle in my GS550T. Performed stator measurements and it seems pretty ok (as per manual). So decided to measure current flows to establish what is the main load. It turned out that it's ignitor unit- it draws ca. 3,3Adc when the motor is not even started. This explains why it's discharging so fast when ignition switch is on. Would like to mention that the same results were obtained with both ignitor devices that I have (one mounted and one spare).

Have anyone measured this before as with such a load (ca. 38W of const. power consumpion) it's no a surprise that baterry is dead when commuting in coty traffic (lots of idling when waiting for light change or slow ride in traffic....). Any solutio/proposal/upgrade?
Click to expand...

yes that is correct, the headlamp and lights are much higher. At least 5 amps per circuit. Do as Tom said and run the tests in Quick Test and read the Link GS Stator both are in my Signature.
 
Send a PM to Steve on this forum. I saw the other day he is selling rewound stators for a very reasonable price, and backs them with a 1 year warranty.
 
Will try to mange this withing my own country first (lower shipping rate and other problems when there?s a border in between)- if will not succeed will post him. Thank you for info!

BTW
I do not think that this stator has some black magic inside- I've got at least few places around where they are rewinding electric engines etc. It should be enough for a skilled person to count windings and do it :)
 
Its not hard to do. Just time consuming. But if they can wind an armature, they can handle this.
There is even a how-to in the stator papers.
 
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