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TOPIC: 77 kz 1000A1 Loses spark and dies along with lights and button start after 20min

77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 27 Jun 2020 20:01 #829174

  • Colecarv
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My bike dies after 20 minutes.

Starts to lose spark, signal relay stops flicking, and headlight goes dimmer,
Then the bike dies at low rpm, kick starts again but sputters, dies after a minute of riding.
I put a new battery in it today

Same thing started happening after 15-20 minutes.

It has fresh 91 gas,
I had installed a new fuel filter which seems to have decent flow.

however the lighting issue and lack of cranking amps to the starter motor after Running for 15-20 monutes makes me think its the charging system.

Regulator Rectifuer, stator etc.

All the electrical works great when the battery is on the tender and significantly charged

Really hope for some help and insight,
Cheers

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77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 27 Jun 2020 21:58 #829180

  • F64
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Grab your volt meter.
Positive probe on postive battery terminal.
Negative probe on negative terminal.
Note the voltage.

Fire the bike up.
Note the voltage.

Raise the rpm to 2000.
Note the voltage.

Turn on your high beams
Note the voltage.

Raise rpm to 5k.
Note the voltage.

How did it do?
81-KZ440-D2. Louis Dudzik's GM HEI ignition module converted 2015--no issues, Motogadget m-unit blue.

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Last edit: by F64.

77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 28 Jun 2020 08:59 #829203

  • Colecarv
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Thanks, I will.
This Morning I made sure the regulator had a direct to frame ground connection because I had done a custom electrical mounting tray under the seat. Cleaned the plugs, started up No problem and everything worked strong. Rode it around the block until it started to sputter again and died just as i was pulling into the garage. Atleast i have eliminated one of t variables.

I have the Battery Charging now on the tender and i’ll check the voltages like/how you suggested this evening and post an update as soon as Possible.

Thanks !

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77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 29 Jun 2020 11:02 #829323

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Battery charges to 13.03 volts

BIKE OFF:
Battery Steadily declines in voltage if key is turned with lights off (gauge lights and neutral light on ofcourse) but rests at 12.15 volts.(regulator OK?)
Battery steadily (but more quickly) declines in voltage if the headlight is turned ON, (Normal for lights to drain the battery if the bike isnt running)

If starter is activated it will rapidly decline in voltage.

BIKE ON:
12.38 volts at idle (1100 rpm) with lights off
12.25 volts at idle with lights on
12.4 v at idle with high beam on
12.21-12.16 v at idle with signals on

Drops to 11.8 volts if revving, even at above 4,000 RPM

11.6 v with blue unplugged, while running
11.4 v with green unplugged, while running
11.5 v with white unplugged while running

Does not seem to change at 4000 RPM

I measured 12.85 Volts at the white wire going to the Rectifier (congruent with the Battery)

thanks for any suggestions and help.

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77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 29 Jun 2020 11:28 #829327

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Congratulations!
your battery is not charging.
Now we have to figure out why.

I'll see if I can find a schematic.
Some others will chime in as well.
81-KZ440-D2. Louis Dudzik's GM HEI ignition module converted 2015--no issues, Motogadget m-unit blue.

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Last edit: by F64.

77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 29 Jun 2020 11:51 #829334

  • Mikaw
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Here.
1976 KZ 900 A4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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The following user(s) said Thank You: F64

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77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 29 Jun 2020 11:52 #829335

  • Mikaw
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1976 KZ 900 A4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 29 Jun 2020 13:36 #829351

  • Colecarv
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So now that I have a schematic
And nailed down that the battery is definitely not charging; what is the first test I should make on the modules/wiring?

i know the blue plug feeds from the generator, mine is phase sensitive as its an early model A1 (pink blue yellow).
I had lengthened the wiring of the blue plug to snake up under the seat as I have hidden the electrical under t he seat. which wires can I probe in order to find out of the generator is in fact making electricity that (would) get to the regulator and rectifier ?

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77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 29 Jun 2020 14:14 #829355

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Did you check your battery acid Level??? Some battery cells need to refill with destilled water after "a full charge" on the battery tender.
A dead or dry cell can drop all the power you need and could be a pain in the a**!!!

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Last edit: by Scirocco.

77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 29 Jun 2020 14:20 #829356

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i bought a new dry cell and installed it the first time i noticed the dying lights/bike.
thanks for the note though

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77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 29 Jun 2020 15:21 #829374

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Did the battery charge before you relocated the regulator?
81-KZ440-D2. Louis Dudzik's GM HEI ignition module converted 2015--no issues, Motogadget m-unit blue.

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77 kz 1000A1 Loses spark and dies along with lights and button start after 20min 29 Jun 2020 15:28 #829379

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Test the battery... if its good you should be able to load it to drop the voltage... it needs to recover to 12.6 on its own or its suspect of being good... the problem is batteries especially if the are bought online are old before you get them... we have discussed this issue at length on this forum about Chinese batteries bought online...
1976 KZ 900 A4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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