BMW K bikes (Bricks)

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RT

RT
Life time member
Life time member
Hi gurus
just seem to be developing a narky problem, after having done many miles lately and the weather warming, but not too hot yet.
Yesterday I was punting along and thought I detected a couple of slight misses, or power loss, very brief, then when I dismounted to open my front gate, I turned her off and when I tried to restart, seemed to me like a vapour lock occuring. Lots of power through to the pump but no start. After about 10 cranks she started and purred away.
Today, similar, one sudden quick loss of power, then normal, then a hard start after parking on sidestand in the sun. If it was an old VW beetle I'd say vapour lock, then later no problem after being on centre stand in the shade.
So am I looking at a fuel filter replace?. The pump has been working really well. It has only been 26deg C so I shouldn't think that's a problem. Where to start.
Always use 98 Octane juice and it never sits for long in my tank.
Thanks for any thoughts.
RT



Last edited by RT on Thu Jan 03, 2013 10:06 pm; edited 1 time in total (Reason for editing : Missed a full stop..)


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2011 R1200RT
    

Inge K.

Inge K.
VIP
VIP
Sounds like a electric problem to me......

When the filter starts to be clogged, you hear/feel that the engine ain't get enough fuel, when you twist it wide open.... on the open road.

Could be a shoot in the dark.....but I would first have checked the L-jetronic connector (properly seated), and then the connector between the engine and chassis harness.



Last edited by Inge K. on Thu Jan 03, 2013 10:32 pm; edited 2 times in total (Reason for editing : Adding info.)


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

RicK G

RicK G
admin
admin
It could be a vapor lock but it sounds like fuel pump to me. The symptoms are very much the same as when mine went on me on the way home from Winton. Check the 4 pin connector that connects the tank to the harness, on the female part of the plug the sockets are prone to opening up and making intermittent connection.


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"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
    

rosskko

rosskko
VIP
VIP
Jinx.

That's what you get RT for saying how well it is going. "I know I should do xyz, but it is running so well at the moment I am reluctant to touch it"

Workshop coming up at Robertson. Pints of Coopers Pale at the pub, back to RT's to polish off the rest of Col's beer he never drank and sleep on the floor with a dog.

Sounds like a good weekend.

Oh. Fuel filter. Or the splines. Maybe a loose footpeg.


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

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321
    

klompy the grey brick

klompy the grey brick
VIP
VIP
Robertson is not that far...and they are mighty friendly....Very Happy


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KKlompy Intermittent loss of power and hard start 2854237993
"Grace" 1984 K100RS Silver VIN 0019026 Mitt eine Staintune Zorst.
"Olivia" 1997 K1100LT Dark Grey VIN WB1052600W0237453.









Chassis number0019026
Vehicle code0503
SeriesK589
ModelK 100 RS 83 (0502 ( 0503 )
Body typeK 100 RS 83 (0502
Catalog modelECE
Production date1984 / 07
Engine0513)

Intermittent loss of power and hard start Au-log10


    

RT

RT
Life time member
Life time member
Thanks everyone
I have a spare new pump and filter so may as well do the lot in one go. Just don't like being off the road too long and I am such a procrastinator that it'll take a week to decide to de pressurize the system. Maybe I'll check the connectors first, Inge has a pretty good track record and it is the easy option. Looking at 40 odd degree C today which is cooler than elsewhere in Oz, so not much fun on the road. (I see putty road claimed another one yesterday. Be careful out there).
RT


__________________________________________________
2011 R1200RT
    

RT

RT
Life time member
Life time member
Well now I am not sure what's going on. Took a leisurely 150k ride up hill and down dale etc, medium warm temperature, brekky at Kiama, back up the big pass near me, absolutely no trouble or sign of a miss or cough or starting problems.
Be off for a 200k run today with the missus and her bike. It'll be a bit warmer so see if anything happens.
Cheers RT


__________________________________________________
2011 R1200RT
    

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