BMW K bikes (Bricks)

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1Back to top Go down   Finicky Starting Empty Finicky Starting Tue Jul 02, 2013 9:55 am

charliebarnwell

charliebarnwell
active member
active member
Cant believe how hard it is to get starting right on my old K100 1987, its only done 27k miles but if I dont get the choke just right the bugger wont start. Even when the weather is nice and warm I try without choke thinking it will fire up - not a hope still have to give it a bit of choke.
I just about get to the stage where I run the battery (new) down and it will suddenly fire up, next day I can go to it and it starts immediately. Only had it a week so will soon get the swing of it I hope.

Done a service on it, new plugs, filters, oil, perhaps thats what is causing the problem - I've spoiled it and now its going to play up for a few months !

To be fair it was laid up in an old Barn for a couple of years until I found it and resurrected her.

    

2Back to top Go down   Finicky Starting Empty Re: Finicky Starting Tue Jul 02, 2013 10:12 am

rosskko

rosskko
VIP
VIP
I have two Ks and they both start differently.
Original bike 86RT I give choke, hit the starter enough to get the pump fired up to prime the system, wait 3 seconds and then she fires straight up.

Second K, 88 I have had 6 months. Bit of choke (maybe not needed but it is habit now), starter and off she goes.

Probably no help to you at all, but the wild turkey is telling me I need to reply to at least 5 posts before bed.
Next.


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

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321
    

3Back to top Go down   Finicky Starting Empty Re: Finicky Starting Tue Jul 02, 2013 11:08 am

charliebarnwell

charliebarnwell
active member
active member
That bit about priming the pump and waiting for 3 seconds sound like a plan, will try that in the morning. Thanks

    

4Back to top Go down   Finicky Starting Empty Re: Finicky Starting Tue Jul 02, 2013 2:50 pm

walfish

walfish
Life time member
Life time member
Mine starts up on first touch of the button, no choke or throttle, the only time I ever use the choke is in mid winter. Doesn't help I know but gives an idea of what some other bikes are doing.
Have you checked your plugs?


__________________________________________________
Finicky Starting Uk-log10
                            88 K75 S 0107569 (she's a keeper)
                            88 K 100  0033026 (gone)
   
                            92 K 1100 LT  6455097 (gone)
    

5Back to top Go down   Finicky Starting Empty Re: Finicky Starting Wed Jul 03, 2013 9:17 am

Rick G

Rick G
admin
admin
Bosch will tell you that the jetronic systems are not designed to be started using any throttle as that messes with the poor things brain and it has a hissy fit. The jetronic ECU is a very primitive thing by todays standard. My K100 I have since sold would not start with even the slightest throttle, even think about it and no start and the Ford I had with LE Jetronic was the same, any throttle and you could wind it over till the cows came home and no start.
The K75 will start at a mere touch and the K1100 wants to prime as RossKo was saying but the main thing is don't play with the throttle as it does upset them.
The think they call a "choke" is a way of increasing the idle so as to keep it running once started when its cold it does not enrich the mixture at all. I was led to belive some time ago that if the choke was pushed to the full on position that it would then enrich the mixture it does not do that. The mixture is enriched automaticly acording to temperature of the coolant and also when you touch the starter button untill it reaches an engine speed of 711rpm when the earth is removed from the start system so as to prevent accidental starter engagement while running.


__________________________________________________
"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, 1986 K75 GS.
    

6Back to top Go down   Finicky Starting Empty Re: Finicky Starting Wed Jul 03, 2013 10:24 am

charliebarnwell

charliebarnwell
active member
active member
Just tried the 3 second wait bit, didnt touch the throttle - started immediately. Think I am sorted thanks to you guys.

Like you say the slightest touch of the throttle and it aint gonna fire up no way.

Cheers all

Charlie

    

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