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External
Since: Feb 25, 2004
Posts: 6
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(Msg. 1) Posted: Wed Feb 25, 2004 6:14 am
Post subject: BMW K 75 Problem: mysterioes loss of power
Archived from groups: rec>motorcycles>tech (more info?)
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I recently have a strange problem with my girlfriends BMW K75 from
1985 (yup, you got it right, she owns the bike, I have the problem 
The bike starts fine, usaually runs well but sometimes it seems to
experience a sudden loss of power while driving. I then still can
shift gears in the normal way but no matter which gear I use, no
matter which speed I'm at, the engine won't go over 5000 rpm (or so,
at least not even close to the "red area")!
This behaviour doesn't seem to follow any pattern: rain, heat, warm or
cold engine,lights on/off ... all that doesn't seem to have an impact.
Once I stop the enigne(sometimes for a minute, sometimes for hours)
the engine works fine again until ...hups, there she goes again.
A friend told me, this problem could be connected to the "failure
memory" which, once it gets a signal about e.g. a broken sensor,
limits the maximum power of the engine. This way you are able to reach
the next garage, though with limited power only.
Does this problem mean anything to anybody? Experiences?
Thanks for any input! |
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External
Since: Oct 27, 2003
Posts: 83
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(Msg. 2) Posted: Wed Feb 25, 2004 4:56 pm
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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External
Since: Dec 28, 2003
Posts: 19
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(Msg. 3) Posted: Wed Feb 25, 2004 7:33 pm
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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markus.alt DeleteThis @gmx.de (Markus Alt) wrote in
news:920cd5b7.0402250514.e681db6@posting.google.com:
> Once I stop the enigne(sometimes for a minute, sometimes for
> hours) the engine works fine again until ...hups, there she goes
> again.
It could be a plugged vent in the fuel tank. When it does this, try
opening the fill cap; if there's a sudden inrush of air and the
engine then runs fine, your tank vent may be plugged and you're
getting a vacuum in the tank.
-Keith<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Sep 11, 2003
Posts: 23
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(Msg. 4) Posted: Wed Feb 25, 2004 7:41 pm
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
s,Coils,Coils,Coils,Coils,Coils,Coils,Coils,
Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
s,Coils,Coils,Coils,
Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
s,Coils,Coils,Coils,
Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
s,Coils,Coils,Coils,
Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
s,Coils,Coils,Coils,
Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
s,Coils,Coils,Coils,
"Markus Alt" <markus.alt RemoveThis @gmx.de> wrote in message
news:920cd5b7.0402250514.e681db6@posting.google.com...
> I recently have a strange problem with my girlfriends BMW K75 from
> 1985 (yup, you got it right, she owns the bike, I have the problem
>
> The bike starts fine, usaually runs well but sometimes it seems to
> experience a sudden loss of power while driving. I then still can
> shift gears in the normal way but no matter which gear I use, no
> matter which speed I'm at, the engine won't go over 5000 rpm (or so,
> at least not even close to the "red area")!
>
> This behaviour doesn't seem to follow any pattern: rain, heat, warm or
> cold engine,lights on/off ... all that doesn't seem to have an impact.
>
> Once I stop the enigne(sometimes for a minute, sometimes for hours)
> the engine works fine again until ...hups, there she goes again.
>
> A friend told me, this problem could be connected to the "failure
> memory" which, once it gets a signal about e.g. a broken sensor,
> limits the maximum power of the engine. This way you are able to reach
> the next garage, though with limited power only.
>
> Does this problem mean anything to anybody? Experiences?
>
> Thanks for any input!<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Nov 16, 2003
Posts: 3479
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(Msg. 5) Posted: Wed Feb 25, 2004 9:02 pm
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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AkaZilla <akazilla.RemoveThis@aol.com> wrote:
> Aloha,
> Is this an injectd bike? If so check the injection computer to see if it is
> flashing an error codes.
> If this is a bike with carbs, check to see if fuel lines are
> kinked/blocked/restricted in any way.
>
Jeez..... when ignoramuses offer help )
--
Trophy 1200 750SS CB400F CD200 ST70 YTC#3
GAGARPHOF#30 GHPOTHUF#1 IHABWTJ#1 BOTAFOT#60 ANORAK#06
BOF#30 WUSS#5 <a style='text-decoration: underline;' href="http://www.chateau.murray.dsl.pipex.com/" target="_blank">http://www.chateau.murray.dsl.pipex.com/</a><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Jul 21, 2003
Posts: 45
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(Msg. 6) Posted: Wed Feb 25, 2004 11:29 pm
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Keith Winter <TrumpetRider.RemoveThis@do.not.spam.me.hotmail.com> wrote:
>markus.alt@gmx.de (Markus Alt) wrote in
>news:920cd5b7.0402250514.e681db6@posting.google.com:
>
>> Once I stop the enigne(sometimes for a minute, sometimes for
>> hours) the engine works fine again until ...hups, there she goes
>> again.
>
>It could be a plugged vent in the fuel tank. When it does this, try
>opening the fill cap; if there's a sudden inrush of air and the
>engine then runs fine, your tank vent may be plugged and you're
>getting a vacuum in the tank.
Don't forget the fuel filter, particularly if the bike sat for a
considerable length of time at some point (since the filter was last
changed).
Mark Hickey<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Dec 07, 2003
Posts: 219
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(Msg. 7) Posted: Thu Feb 26, 2004 12:19 am
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Markus Alt" <markus.alt.TakeThisOut@gmx.de> wrote in
news:920cd5b7.0402250514.e681db6@posting.google.com...
> I recently have a strange problem with my girlfriends BMW K75 from
> 1985 (yup, you got it right, she owns the bike, I have the problem
>
> The bike starts fine, usaually runs well but sometimes it seems to
> experience a sudden loss of power while driving. I then still can
> shift gears in the normal way but no matter which gear I use, no
> matter which speed I'm at, the engine won't go over 5000 rpm (or so,
> at least not even close to the "red area")!
>
> This behaviour doesn't seem to follow any pattern: rain, heat, warm or
> cold engine,lights on/off ... all that doesn't seem to have an impact.
>
> Once I stop the enigne(sometimes for a minute, sometimes for hours)
> the engine works fine again until ...hups, there she goes again.
>
> A friend told me, this problem could be connected to the "failure
> memory" which, once it gets a signal about e.g. a broken sensor,
> limits the maximum power of the engine. This way you are able to reach
> the next garage, though with limited power only.
>
> Does this problem mean anything to anybody? Experiences?
>
> Thanks for any input!
Probably useless information but a friend of mine had somewhat
similar problems. His got so bad that it would not idle or start.
In his case the cause was one injector that was bad and the
pressure control valve (a kickback that opens back to the tank)
was faulty and dumped the injection pressure.
--
Ole Holmblad - Göteborgs Prima MCK
TDM850 / XT600 FL#44 UKRMSBC#08
SGFPTH#00 Remove hat to answer by mail<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Feb 25, 2004
Posts: 6
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(Msg. 8) Posted: Thu Feb 26, 2004 1:24 am
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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>
> Probably useless information but a friend of mine had somewhat
> similar problems. His got so bad that it would not idle or start.
>
> In his case the cause was one injector that was bad and the
> pressure control valve (a kickback that opens back to the tank)
> was faulty and dumped the injection pressure.
Taking into account, how many cables and stuff I checked on this bike,
no idea/ information is useless for me  So I will definately check
this next weekend, thanks!<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Feb 25, 2004
Posts: 6
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(Msg. 9) Posted: Thu Feb 26, 2004 1:26 am
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"David" <noemail.DeleteThis@abc.com> wrote in message news:<koa%b.8591$ee3.398147@news20.bellglobal.com>...
> Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
> s,Coils,Coils,Coils,Coils,Coils,Coils,Coils,
> Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
> s,Coils,Coils,Coils,
> Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
> s,Coils,Coils,Coils,
> Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
> s,Coils,Coils,Coils,
> Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
> s,Coils,Coils,Coils,
> Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coils,Coil
> s,Coils,Coils,Coils,
>
Hmmmmm, looks important. Can you detail this for me?<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Sep 12, 2003
Posts: 1192
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(Msg. 10) Posted: Thu Feb 26, 2004 1:51 am
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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markus.alt.TakeThisOut@gmx.de (Markus Alt) wrote in message
<920cd5b7.0402250514.e681db6.TakeThisOut@posting.google.com>:
>I recently have a strange problem with my girlfriends BMW K75 from
>1985 (yup, you got it right, she owns the bike, I have the problem
<snip>
>Does this problem mean anything to anybody? Experiences?
There's a throttle switch which (apparently) sometimes becomes jammed-
this causes the injection unit to 'believe' that the throttle is shut.
Not sure if this is it and it's not a fault I've had. Just one I've
read about!<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Jun 26, 2003
Posts: 293
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(Msg. 11) Posted: Thu Feb 26, 2004 1:51 am
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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deadmail RemoveThis @burnt.org.uk wrote:
>
> markus.alt RemoveThis @gmx.de (Markus Alt) wrote in message
> <920cd5b7.0402250514.e681db6 RemoveThis @posting.google.com>:
>
> >I recently have a strange problem with my girlfriends BMW K75 from
> >1985 (yup, you got it right, she owns the bike, I have the problem
> <snip>
>
> >Does this problem mean anything to anybody? Experiences?
>
> There's a throttle switch which (apparently) sometimes becomes jammed-
> this causes the injection unit to 'believe' that the throttle is shut.
>
> Not sure if this is it and it's not a fault I've had. Just one I've
> read about!
That's thinking outside the boxer!
But near as I can tell, a stuck switch would prevent the engine from
exceeding 2000 rpm.<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Oct 27, 2003
Posts: 83
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(Msg. 12) Posted: Thu Feb 26, 2004 5:26 am
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Aloha,
clip from previous post..........Jeez..... when ignoramuses offer help
)...........end clip
Ignoramus or not, It sounded like bad fuel delivery to me, and I was unsure of
the bikes fueling system.
In other news, too damn busy to do much riding right now. How about you?
Larry >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Nov 16, 2003
Posts: 3479
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(Msg. 13) Posted: Thu Feb 26, 2004 8:18 am
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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AkaZilla <akazilla DeleteThis @aol.com> wrote:
> Aloha,
> clip from previous post..........Jeez..... when ignoramuses offer help
> )...........end clip
> Ignoramus or not, It sounded like bad fuel delivery to me, and I was unsure of
> the bikes fueling system.
Well, that's what I meant. every single K bike ever built has been fuel
injected, and they've been making them for over 20 years.
> In other news, too damn busy to do much riding right now. How about you?
>
Similar.....
--
Trophy 1200 750SS CB400F CD200 ST70 YTC#3
GAGARPHOF#30 GHPOTHUF#1 IHABWTJ#1 BOTAFOT#60 ANORAK#06
BOF#30 WUSS#5 <a style='text-decoration: underline;' href="http://www.chateau.murray.dsl.pipex.com/" target="_blank">http://www.chateau.murray.dsl.pipex.com/</a><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Feb 25, 2004
Posts: 6
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(Msg. 14) Posted: Fri Feb 27, 2004 1:52 am
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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> That's thinking outside the boxer!
>
> But near as I can tell, a stuck switch would prevent the engine from
> exceeding 2000 rpm.
Hmmm...it goes up higher in my case. But still - thanks - another
thing to check on my list.
I wonder if anybody has heared about this "failure memory", where all
problems get recorded (modern cars have that too, so that your garage
can hook it up to a laptop and see, where the problem(s) come from).
Apparently the K75 has such a thing. Question is: where, can you get
software/ cables to read the memory yourself and has anyone experience
with this kind of stuff?
If not, I will test all the hints given here.<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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External
Since: Oct 27, 2003
Posts: 83
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(Msg. 15) Posted: Fri Feb 27, 2004 3:56 pm
Post subject: Re: BMW K 75 Problem: mysterioes loss of power [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Aloha,
My old Kawasaki has the failure mode injection that allows you to limp home if
the system has the hiccups. I assume that my K1 also has it.
Get a Clymer manual or other good manual for the bike. In the injection section
there should be a section on trouble shooting the injection. (flashing LED,
etc) This will tell you (hopefully) what has gone wrong so you don't have to
replace a dozen things before finding the one that went bad.
Let us know what you find, and how har ($$$) it was to fix.
Take Care,
Larry >> Stay informed about: BMW K 75 Problem: mysterioes loss of power |
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