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flybd5
Flying Brick Rider
Joined: 01 Jul 2019
Posts: 371
Location: Massachusetts, USA
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 Posted: Fri Oct 09, 2020 10:28 am Post subject: ABS quirk |
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On my bike, first ride of the day the ABS doesn't seem to kick in. The warning lights stay on until i stop at a light or sign, turn the bike completely off, turn the key again, start and get rolling. As soon as I get rolling the light finally extinguishes. Do I need to change the sensor on the rear wheel or ??
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To err once is human. To do so repeatedly is incompetence.
1995 K1100LT SE |
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Mike d
Mad Brick Rider
Joined: 19 Feb 2010
Posts: 130
Location: Daventry UK
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| Posted: Fri Oct 09, 2020 12:26 pm Post subject: |
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Are the two warning lights flashing - together or alternately.
If the latter then, it's a sign of low voltage to the ABS caused by the first start up. Usually cleared by riding a mile or so, then trying a restart as per your description.
Mike |
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flybd5
Flying Brick Rider
Joined: 01 Jul 2019
Posts: 371
Location: Massachusetts, USA
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| Posted: Fri Oct 09, 2020 2:23 pm Post subject: |
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Thanks. kinda weird since it only happens on the first start of the day.
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To err once is human. To do so repeatedly is incompetence.
1995 K1100LT SE |
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Grunter
Flying Brick Rider
Joined: 30 Sep 2015
Posts: 369
Location: North East England
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| Posted: Fri Oct 09, 2020 2:37 pm Post subject: ABS |
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Yes that is normally the way it happens.
With my last K1100 this started to take place and I just lived with it. Then after a lay off for 2 weeks I went back to the bike and the battery was almost lifeless. I replaced the battery and all was OK again.
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1997 K1100LT
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Jim
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Joined: 17 May 2003
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Location: WHERETHEFUNNEVERENDS
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| Posted: Fri Oct 09, 2020 3:09 pm Post subject: |
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Time for a new battery... or else get the current battery charged up.
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Jim
1997 K1100LTSE 94,000 - has gremlins!
1995 R100RT Classic 16,650 crashed - repairing
1992 K75RTP 46,000
"We shall not all die, but we shall all be changed." |
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flybd5
Flying Brick Rider
Joined: 01 Jul 2019
Posts: 371
Location: Massachusetts, USA
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| Posted: Fri Oct 09, 2020 3:34 pm Post subject: |
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| Jim wrote: | | Time for a new battery... or else get the current battery charged up. |
The battery is fully charged, and it has been doing it since before I bought this battery. I doubt it is a battery issue.
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1995 K1100LT SE |
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Scott_Anderson
Site Admin
Joined: 05 Sep 2006
Posts: 3121
Location: Central Iowa, USA
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| Posted: Fri Oct 09, 2020 4:26 pm Post subject: |
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Sounds like you may be having the beginnings of a starter issue.
When the battery is 'cold' at 1st start, the voltage could be dropping just enough to make the ABS unhappy. Then later as the battery is warm from being freshly recharged(and the heat of the bike), the voltage on restart stays just above the minimum threshold.
What is the AH rating of your battery.
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Ride safe.
1995 K1100LT 0302044
1997 R1100RT ZC62149
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.) |
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flybd5
Flying Brick Rider
Joined: 01 Jul 2019
Posts: 371
Location: Massachusetts, USA
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| Posted: Fri Oct 09, 2020 8:24 pm Post subject: |
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| Scott_Anderson wrote: | Sounds like you may be having the beginnings of a starter issue.
When the battery is 'cold' at 1st start, the voltage could be dropping just enough to make the ABS unhappy. Then later as the battery is warm from being freshly recharged(and the heat of the bike), the voltage on restart stays just above the minimum threshold.
What is the AH rating of your battery. |
The battery is 21AH and the German smart charger says it is completely healthy. The voltage is always low when you start -- the alternator and charging don't kick in until you rev to about 1400, which I always do right after starting. And this happens even when the charger has been connected and keeping the battery topped off all night. I hear what you are saying but I have my doubts this is the explanation for what I am seeing.
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To err once is human. To do so repeatedly is incompetence.
1995 K1100LT SE |
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Jim
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| Posted: Sat Oct 10, 2020 12:31 am Post subject: |
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Do you have LEDs in the instrument cluster?
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Jim
1997 K1100LTSE 94,000 - has gremlins!
1995 R100RT Classic 16,650 crashed - repairing
1992 K75RTP 46,000
"We shall not all die, but we shall all be changed." |
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flybd5
Flying Brick Rider
Joined: 01 Jul 2019
Posts: 371
Location: Massachusetts, USA
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| Posted: Sat Oct 10, 2020 12:33 am Post subject: |
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| Jim wrote: | | Do you have LEDs in the instrument cluster? |
Yes. Why?
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Mike d
Mad Brick Rider
Joined: 19 Feb 2010
Posts: 130
Location: Daventry UK
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| Posted: Sat Oct 10, 2020 5:45 am Post subject: |
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Because if you have one swapped out the charge light filament bulb for an LED version, the excitation current (to kick start the charging for the alternator) will be insufficient.
Having said that, on a lot of K bikes, if the bike is revved to 3-4k rpm it will self excite and start charging. It should then work as normal until you switch of the engine. The next time you start the same problem arises.
Mike |
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Scott_Anderson
Site Admin
Joined: 05 Sep 2006
Posts: 3121
Location: Central Iowa, USA
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| Posted: Sat Oct 10, 2020 7:18 am Post subject: |
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Well, for what it's worth, every now and then when I start my K, cold in the morning, if the bike doesn't fire off right away and I have to hit the starter a couple of times, I get the alternating ABS lights.
Yet after work when the bike has sat in the sun all day, I don't recall ever having the alternating ABS lights at startup.
I've got a 20ah gel battery that was new in '19.
YMMV.
Maybe it's a sign of the times... everything seems to be being made cheaper with lower quality standards than years ago.... I'd imagine that batteries are no different.
_________________
Ride safe.
1995 K1100LT 0302044
1997 R1100RT ZC62149
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.) |
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Acentistaha
Brick Rider
Joined: 28 Sep 2017
Posts: 48
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| Posted: Tue Dec 15, 2020 3:25 am Post subject: |
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| Usually cleared by riding a mile or so, then trying a restart as per your description. |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10092
Location: Bumf***, WA
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| Posted: Tue Dec 15, 2020 8:05 pm Post subject: |
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| Mike d wrote: | Because if you have one swapped out the charge light filament bulb for an LED version, the excitation current (to kick start the charging for the alternator) will be insufficient.
Having said that, on a lot of K bikes, if the bike is revved to 3-4k rpm it will self excite and start charging. It should then work as normal until you switch of the engine. The next time you start the same problem arises.
Mike |
I've been running LEDs in the clusters in all of my Ks for over a decade. Never caused any ABS issues.
Yeah, if you don't rev it enough (2,00-2,500) and the charge LED stays on you're running off of the battery but as soon as you give it enough revs to get the bike moving the LED goes out and all is good.
Example: https://youtu.be/w3mPLnfKDFk
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