BMW K bikes (Bricks)

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1Back to top Go down   Coughing k100 Empty Coughing k100 Wed Oct 23, 2013 5:23 pm

thumperslaw

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Dudes

Help needed Sad
My k100 is got a "cough" in the rev range :/

So far I've checked all spark plugs and they are fine also ht leads

New fuel filter and good battery
New fuel lines.
Still there tho!
Getting small flames out the pipes on all four

    

2Back to top Go down   Coughing k100 Empty Re: Coughing k100 Wed Oct 23, 2013 5:31 pm

Rob Roy Mcgregor

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@thumperslaw wrote:Dudes

Help needed Sad
My k100 is got a "cough" in the rev range :/

So far I've checked all spark plugs and they are fine also ht leads

New fuel filter and good battery
New fuel lines.
Still there tho!
Getting small flames out the pipes on all four
Could it be the timing needs adjusting slightly ?

    

3Back to top Go down   Coughing k100 Empty Re: Coughing k100 Wed Oct 23, 2013 5:49 pm

thumperslaw

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Seem fine for the last 1500 miles and then it started acting up and not charging. I've since sorted charging up this miss fire is getting right on my you no what.


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

4Back to top Go down   Coughing k100 Empty .. Wed Oct 23, 2013 5:52 pm

Rob Roy Mcgregor

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what rev range is it playing up at ?

    

5Back to top Go down   Coughing k100 Empty Re: Coughing k100 Wed Oct 23, 2013 10:24 pm

RicK G

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You say checked plugs but have you replaced them as a low battery can cause plugs to foul and never recover.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

6Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 4:55 am

thumperslaw

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Not got the standard clocks no more
But 55mph in 5 gear it's doing it then.

Checked the gap on the plugs and they where spot on
I've not replace them yet tho

What is a good plugs to go for? I've got nkg d8 at the moment


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

7Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 6:44 am

rosskko

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D7EA
Not 16v?
D7EA

yay. think I got one right


__________________________________________________
1986 K100RT VIN 0093801K100RT with summer fairing for a northern visitor

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321
    

8Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 6:48 am

thumperslaw

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Just looked and it's got d8ea nkg


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

9Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 6:48 am

thumperslaw

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It's k100 lt 8v


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

10Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 6:58 am

rosskko

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I know you have been here for a while but it is a good memory jogger to have a look at THIS page.
So you just bought a K. And thought I had better check it and it says nothing about the plugs.
NGK D7EA are teh ones you want.
Make sure they have the stud on top.
Coughing k100 Spark_plug_diagram
Coughing k100 Url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&docid=sb22mXiwf5YBAM&tbnid=iaUpGZJrxfz2KM:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.oregonproducts.com%2Fpro%2Fproducts%2Foep%2FsparkPlugs.htm&ei=4O5oUs32GIvHkAXZvoDgAw&bvm=bv.55123115,d


__________________________________________________
1986 K100RT VIN 0093801K100RT with summer fairing for a northern visitor

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321
    

11Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 3:17 pm

Rob Roy Mcgregor

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@thumperslaw wrote:Not got the standard clocks no more
But 55mph in 5 gear it's doing it then.

Checked the gap on the plugs and they where spot on
I've not replace them yet tho

What is a good plugs to go for? I've got nkg d8 at the moment

Only at that speed or coughing from that speed upwards ?

    

12Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 4:47 pm

Comberjohn

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Seem to recall a recent thread about having to connect certain wires together when you remove the original clocks or you may get charging problems(?)
Too lazy to find it for you.Coughing k100 Icon_smile


__________________________________________________
Life is not a rehearsal.
2010 VFR 1200F DCT 
2010 R1200GS(gone)
1986 K100 Silver(gone)
2012 K1600GT(gone)
1984 K100RT Madison Silver(gone)
1989 K100LT Stratus Grey(gone)
1984 K100 Red(gone)
http://www.johnsdrivingschool.co
    

13Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 5:13 pm

thumperslaw

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Got nothing to do with clocks
Been running spot on for 1500 miles and not one fault.

It's coughing when in idle and you rev it say 1/4 throttle then it starts doing it.

Changed plugs and still the same and also air flow meter with no joy


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

14Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 5:25 pm

Rob Roy Mcgregor

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does it run with the choke on ok ?

and are you running without the TPS disconected

    

15Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 5:51 pm

thumperslaw

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Tps got set tonight and is all plugge in.
Not tried the choke on yet.

Doing my head in lol. Chasing the around and around


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

16Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 5:59 pm

Rob Roy Mcgregor

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unplug the TPS

    

17Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 6:37 pm

thumperslaw

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Will try that next.


Also my pipes are very very short.
And when I give it some there is yellow flames (very small) comin out. Never has it done it before


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

18Back to top Go down   Coughing k100 Empty Re: Coughing k100 Thu Oct 24, 2013 6:47 pm

Rob Roy Mcgregor

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if it was a gas torch yellow flame would be a non efficient flame sooty but if it was a blue flame then that would be hotter . .do you think its getting to much fuel and not burning it off properly ? and the plugs are deffo not black and sooty/wet ?

What you need is someone that works on jet engines to tell you about flames and efficency . . look what comes out of a jet on afterbuner its like blue pure hot burned gas with no sooty smoke

maybe because you got them fancy pipes you need a colder set of plugs someone here will tell you the direction to go dont take my word for it but i think it would be a step down to a "7"

    

19Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Oct 27, 2013 4:05 pm

thumperslaw

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Right after long day at my workshop I've done the following

Swapped plugs,coil pack,leads
Fuel injection rail and injectors
Cdi box and injector box
Air flow meter
Tps

Still no joy :/


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

20Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Oct 27, 2013 4:22 pm

K-BIKE

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Work through the troubleshooting ladder diagram and also check your fuel pressure.
Regards,
K-BIKE

    

21Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Oct 27, 2013 5:58 pm

Inge K.

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Could also be a idea to check the water temp sensor.

Measure the resistance between contact #10 & 13 at the Jetronic
multiconnector and compare with the temp/resistance chart in the
troubleshooting diagram at the portal.

For multiconnector numbering, look at reply 13 in this link.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

22Back to top Go down   Coughing k100 Empty Re: Coughing k100 Fri Nov 01, 2013 10:06 am

thumperslaw

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The ingition thing (at the front of the engine) is that in a oil bath?


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

23Back to top Go down   Coughing k100 Empty Re: Coughing k100 Fri Nov 01, 2013 10:36 am

RicK G

RicK G
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No it's dry


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

24Back to top Go down   Coughing k100 Empty Re: Coughing k100 Fri Nov 01, 2013 6:03 pm

thumperslaw

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Well it wasn't that!

Next....


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

25Back to top Go down   Coughing k100 Empty Re: Coughing k100 Fri Nov 01, 2013 6:38 pm

Rob Roy Mcgregor

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Sticking cam bucket ?

    

26Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sat Nov 02, 2013 6:09 am

thumperslaw

thumperslaw
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That's next Sad


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

27Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sat Nov 16, 2013 5:42 pm

thumperslaw

thumperslaw
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So I've still not got this sorted

I'll roll off what I've done.

Exhaust
Full loom
Leak down test
Compression check
Temp sensor
Fuel pump
Fuel filter
Switch
Battery
Fuel injection system
Fuel lines
Air flow meter
Air box
Air filter
Balanced throttle bodies

What next


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

28Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Nov 17, 2013 4:15 am

Comberjohn

Comberjohn
Life time member
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Long shot. Someone on the forum had a problem with a slight hesitation.
Turned out to be some metal swarf behind the 'T' shaped cover on the front of the engine where the ignition trigger lives.
Might be worth checking the if ignition timing while you are there, if you haven't done that already.


__________________________________________________
Life is not a rehearsal.
2010 VFR 1200F DCT 
2010 R1200GS(gone)
1986 K100 Silver(gone)
2012 K1600GT(gone)
1984 K100RT Madison Silver(gone)
1989 K100LT Stratus Grey(gone)
1984 K100 Red(gone)
http://www.johnsdrivingschool.co
    

29Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Nov 17, 2013 5:39 am

thumperslaw

thumperslaw
Silver member
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Changed the ignition thingy got changed

Coils
Plugs
Ht leads
Caps
All changed


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

30Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Nov 17, 2013 4:29 pm

thumperslaw

thumperslaw
Silver member
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Also check tps is set right


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

31Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Nov 17, 2013 7:32 pm

charlie99

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how about throttle body rubbers
are there cracks in them ?

it can be hard to see this in any case ....the tell tale is a slight weeping around them



Last edited by charlie99 on Sun Nov 17, 2013 7:33 pm; edited 1 time in total


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OCoughing k100 Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

32Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Nov 17, 2013 7:33 pm

RicK G

RicK G
admin
admin
Have you checked the whole intake system for air leaks including the crankcase breather system?


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

33Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Nov 17, 2013 7:50 pm

thumperslaw

thumperslaw
Silver member
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Checked all of them
No leaks
Crank case breather pipe is brand new


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

34Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sun Nov 17, 2013 8:10 pm

RicK G

RicK G
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What I am thinking is leaks in the actual crankcase not just at the breather.
Remove the oil filler cap and see if it falters or even stalls. If there is a leak the ingoing air will prevent most of the tell tale oil leak that can occur.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

35Back to top Go down   Coughing k100 Empty Re: Coughing k100 Mon Nov 18, 2013 10:07 pm

ReneZ

ReneZ
Life time member
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Try this; have the bike running and open up the crank case filler plug. If the engine running doesn't change you've got a good air leak somewhere. With all the work you've done is the elbow between the air-filter housing and the plenum properly seated/sealed?


__________________________________________________
Greetings from Florida! Having a 'new' K  :cyclops:    Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Coughing k100 Rain
BMW K1200GT - 2003 (ZK01223)
    

36Back to top Go down   Coughing k100 Empty Re: Coughing k100 Tue Nov 19, 2013 6:04 am

thumperslaw

thumperslaw
Silver member
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Had the cam cover off last night and checked every thing

It seems to have jumped a tooth on the cam chain :/

Was there ever a problem with the tensioner going weak?


__________________________________________________
K100 "ratrod" , VTR firstorm, stunted up srad 750, gsxr 750m (sold) , '86 slabby (Sold)
    

37Back to top Go down   Coughing k100 Empty Re: Coughing k100 Tue Nov 19, 2013 6:54 am

RicK G

RicK G
admin
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If it has jumped a tooth then the chain has to be worn as well as tensioner problems. I would recommend replacing all the bits including the hydraulic piston as next time it might go a few more and destroy an engine.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

38Back to top Go down   Coughing k100 Empty Re: Coughing k100 Sat Aug 16, 2014 12:24 pm

stilbo

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Did you check voltage and connections TO coils?

    

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