BMW K bikes (Bricks)

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1Back to top Go down    New member in maryland on Sat Sep 30, 2017 4:23 pm

Seymoure9

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hi all, my name is eric. ive been working on cars for quite a while now but have been dying to pick up a k bike project as i can be much more creative with it. i have finally purchased a 1985 k100!....i bought the bike thinking the only issue was a sticking sprag but then i realized i have a much larger job than i thought (burnt front control wiring). i chose to join this forum to pick some of your brains and sort out this wiring nightmare i got myself into as well as documenting my progress.

info on the bike:
1985 k100
roughly 25k
have changed all the fluids/ plugs/ and filters so far just to get my feet wet

wish me luck, hopefully i will be able to save this bike and put one more flying brick on the road!

    

2Back to top Go down    Re: New member in maryland on Sat Sep 30, 2017 4:38 pm

duck

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WelKome to the site.

What does "burnt front control wiring" refer to? The turn signals and horn or something more?


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

3Back to top Go down    Re: New member in maryland on Sat Sep 30, 2017 6:04 pm

MD K100RS

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Where in MD are you?


__________________________________________________
1989 K100 RS SE
1974 R75/6
to many bicycles to count...
http://www.ars-natura.com
    

4Back to top Go down    Re: New member in maryland on Sat Sep 30, 2017 6:43 pm

Seymoure9

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im in frederick maryland.


as for the wiring it seems the yellow wires from both front controls are good and melted. i will take a picture and post it on here. i am unsure of where the go bc i do not want to put a battery in the bike and let the burn continue. i have removed all of the wiring from the bike to rewire it all before reinstalling.

    

5Back to top Go down    Re: New member in maryland on Sat Sep 30, 2017 8:51 pm

duck

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The white/yellow on the right and left and white wires on the left are for the headlight. My guess would be that somebody used a headlight bulb with higher than 60/55W which is what melted the wires.

Always a good idea to install headlight relays on a K anyhow:
http://www.kbikeparts.com/classickbikes.com/ckb.tech/0.ckb.tech.files/hl.relays/hl.relays.htm


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

6Back to top Go down    Re: New member in maryland on Sat Sep 30, 2017 10:50 pm

Point-Seven-five

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+1 on what the Duck said. BMW, for some unknown reason did not fuse the headlight wiring. A bad or oversize bulb can happily draw all kinds of current melting wires and burning up switch contacts. Be sure to check the the headlight(if installed) and dimmer switches for proper operation.


__________________________________________________
Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

7Back to top Go down    Re: New member in maryland on Sat Sep 30, 2017 10:58 pm

Point-Seven-five

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I installed Eastern Beaver relay harnesses on all my bricks. The quality is fantastic and the price is good. AND you get a FUSE!

http://www.easternbeaver.com/Main/Wiring_Kits/H4_Kits/h4_kits.html


__________________________________________________
Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

8Back to top Go down    Re: New member in maryland on Sun Oct 01, 2017 2:32 am

Seymoure9

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thanks guys i appreciate the quick responses and info from both of you. thanks to this forum ive been able to find lots of fun wiring information and some tips on solving and preventing the dreaded sprag clutch sticking issues.

wish me luck! ill see you guys around!

    

9Back to top Go down    Re: New member in maryland on Sun Oct 01, 2017 10:50 am

Born Again Eccentric

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@Seymoure9 wrote:...have changed all the fluids/ plugs/ and filters so far just to get my feet wet.

wish me luck, hopefully i will be able to save this bike and put one more flying brick on the road!
Welcome along Eric,

You really should use some sort of receptacle for catching the old oils and coolant...it's fine to drop it on the workshop floor if you really want to get your feet wet, but it makes one heck of a mess and isn't very enviro-friendly.

Seriously though, good luck with the project, lots of good advice and suggestions hereabouts to help you along the way.

Enjoy


__________________________________________________

Paul

"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 Insurancewrite-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)
    

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