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Author Topic: 92 K75S turns over without key in  (Read 1821 times)

Offline boxer.randy

  • Motobrick Curious
  • Posts: 14
92 K75S turns over without key in
« on: July 07, 2020, 02:45:21 PM »
Left the bike for 7 months. Disconnected the negative. Returned and charged the old battery and tried to start. It almost caught but then died and made a strange sound. Put in a new battery and with the computer out and key off it sparks at the neg and the engine turns over. Before I drain the gas tank - it’s Full of course, am I right in assuming that the starter relay fried? I have a spare ready. Would love to have some advice. Thanks.
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  • Prescott, Arizona
  • K75S

Online The Mighty Gryphon

  • Administrator
  • ^ Quintessential Motobricker
  • Posts: 6658
Re: 92 K75S turns over without key in
« Reply #1 on: July 07, 2020, 03:32:35 PM »
Sounds like the contacts are welded on the starter relay. 

Does the starter spin as soon as you connect the battery even if you aren't pressing the start button?
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline boxer.randy

  • Motobrick Curious
  • Posts: 14
Re: 92 K75S turns over without key in
« Reply #2 on: July 07, 2020, 05:39:25 PM »
Yes it spins with everything off. Bought the bike 2 years ago. Was a garage queen with 9000 miles. An exact duplicate of my 92 S that I sold 25 years ago, so I had to have it. After charging the 2007 battery and it all died, I tested the voltage and it read 1.78 volts. I’m Sure I fried the starter relay. Thanks for the reply.
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  • Prescott, Arizona
  • K75S

Offline volador

  • ^ Quintessential Motobricker
  • Posts: 1165
  • NEEDS MORE CHROME
Re: 92 K75S turns over without key in
« Reply #3 on: July 07, 2020, 06:42:21 PM »
Take a breaker bar handle or something of the like and whack the right rear edge of the relay box. You might dis-lodge the contacts.
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  • NYC NY
  • 1991 K100RS 1993 K75S ABS
5 BOROUGHS SISYPHEAN SOCIETY  MAINTAINING THE OBSESSION

Offline Martin

  • ^ Quintessential Motobricker
  • Posts: 4440
Re: 92 K75S turns over without key in
« Reply #4 on: July 08, 2020, 03:39:48 AM »
If tapping it doesn't free it up the cover can be removed with a bit of effort. Once removed the stuck contacts can gently pried apart,
you can then file them with a pints file.
Regards Martin.
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  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline boxer.randy

  • Motobrick Curious
  • Posts: 14
Re: 92 K75S turns over without key in
« Reply #5 on: July 09, 2020, 03:14:21 PM »
Put a new relay in and all is fine. Took apart the old starter relay. Contacts were open but the inputs showed continuity. Must be a short somewhere.
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  • Prescott, Arizona
  • K75S
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