BMW K bikes (Bricks)

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1Back to top Go down   Introduction Empty Introduction on Sat Mar 25, 2017 5:38 pm


active member
active member
Howdy all.
I picked up an '85 k100 and ran it for a while Nov. '15 to spring '16.
Great little unit, naked, competes with r1200clc and a vstrom for my attention.
Beauty in town, but I like the biggy bike for the highways in southern NM. Dirt is, dirt.
No good tires on the K for that stuff.
Right now the Kbike start circuit cycles with no result.
On for a second, then quiet for a second. Then on again for a second. Etc...

Led me to you folks for "experience" ... successful experience.

Glad you let me in.


2Back to top Go down   Introduction Empty Re: Introduction on Sat Mar 25, 2017 9:56 pm


Life time member
Life time member
Hi Introduction 177912 That's one problem I've not heard of/seen, but I'll bet someone who does know will be along soon.

'83 K100 upgraded to K100RS spec, '87 K100RT
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California

3Back to top Go down   Introduction Empty Re: Introduction on Sun Mar 26, 2017 5:27 am

Born Again Eccentric

Born Again Eccentric
Life time member
Life time member
Welcome aboard kcdman.

Small world...I was in Las Cruces, NM on 2-3 Mar this year on a work trip. Pity you hadn't joined the forum a month earlier - we could have met up for a beer and a natter and had a look at your ol' K.

You've certainly got some serious desert highways out there - I went out as far as the White Sands visitor centre (by car, unfortunately) and some almost sensible speed limits (75mph) to suit those long straight roads, unlike some other states.

Strange sounding problem you have with your ignition - perhaps a bit more description of exactly what happens when you press the green button - as in does the starter motor actually spin, fuel pump run and/or do you have any other unusual indications on you instrument cluster. Sounds like it could be a corroded/worn connection somewhere that is giving an intermittent path to earth. Many electrical problems have their root with the starter motor so probably worth looking at your starter motor brushes in the first instance.

Introduction Uk-log10 Introduction Sco-lo15Introduction Eu-log10
                              Paul  Introduction 905546712

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurance write-off rebuild Feb 17
"Donor" K100LT 1990 (Red)  (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike).   June 2012 (73,000 miles) to November 2013 (89,500 miles)

4Back to top Go down   Introduction Empty Re: Introduction on Sun Mar 26, 2017 5:29 am


Silver member
Silver member
Welcome kcdman.

I don't have much experience with the K's as yet, however on my Triumph the first port of call for any weird starting issues is an old/dodgy battery, closely followed by ground connections.

Chassis number0025951
Vehicle code0504
ModelK 100 RT 84 (0504 ( 0505 )
Body typeK 100 RT 84 (0504
Catalog modelECE
Production date1985 / 01

5Back to top Go down   Introduction Empty Re: Introduction on Sun Mar 26, 2017 11:56 am


active member
active member
Thanks folks for the time and attention.
I found a post that sounds familiar.

Push the green button, fuel pump cycles, starter turns for 1-2 seconds then pauses for 1-2 seconds, then turns, etc...
A bit of fire in the jugs but no catch and run.

I jumpered the common ground under the tank to the battery ground on the tranny and thought I had fixed things.
Tricked myself with that one Smile

She has run on and off in the last year (I will push the button just for kicks sometimes) I've had her run for an hour and shut down on the road while in motion. Wait a bit and the started pause issue goes away and so far I've always gotten home.

Also pulled the starter a while back, cleaned out 30 years of carbon, re-assembled and jumped the relay. Full on turning for the time I was hotwired (kill switch in no run position)
Tricked myself then too Smile

Eccentric, yes bad timing but I enjoy the enchanted highways down here. I've been run over by the drone jockies out of Holloman AFB on the long open stretch from Las Cruces to Alampgordo through the missile range. Fun racing them when it happens, but they have me by about 75mph. No contest really but a kick nonetheless.

I'm thinking of Hall Sensor replacement but loathe throwing money just to replace everything one part at a time.

Thanks Nods, I had a fresh battery in when the problem got out of hand and have since taken it out and had it tested at the local auto parts store. They say it's fine. Good call, though. All my stuff lately is battery dependent. Seems like I remember when pulling the battery was a backyard test of the charge/regulating system.

Will keep you posted.


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