1977 BMW R100RS Wiring Harness Routing

[@toddcott9510]

Thanks, just rebuilding my r100s and have not made note of all the wiring, so this was a big help.

[@BrooksAirheadGarage]

I'm pleased this was helpful. That said, you didn't say what year R100S you have. There are differences in the harness for the '77 S and RS mostly due to the instruments, but the overall main harness routing is the same.

[@bikeserv]

Man,you`re a wealth of knowledge and experience on these things

[@BrooksAirheadGarage]

Con, Thank you for you're kind words. But, I've benefited from many generous folks who have worked on these bikes for 40-50 years. All I did was write down, and film, doing what they helped me learn how to do.

[@bikeserv]

@@BrooksAirheadGarage I am a mechanic by trade,and i allways like to watch other ppl do it,so that i might learn something different.I really like your methodology,since i work on many different brands/models,i can get better by using it

[@BrooksAirheadGarage]

@@bikeserv To be clear, I'm not a professional mechanic, but a self-taught hobbyist. That said I was a Mechanical Engineer at one time, so I suspect some of my engineering "DNA" shows up in how I document my work. I'm pleased this material is useful to you. You will find very detailed written documentation about all my BMW airhead rebuild projects on my website: --> brook.reams.me/bmw-motorcycle-rebuilds/

[@BrooksAirheadGarage]

Thank you for your kind words Con Kawa.

[@bikeserv]

@@BrooksAirheadGarage we learn every day. I enjoy that,learning from different sources, helps you sometimes to sort of think outside the box

[@hankrearden2494]

I'm rebuilding my 77' R100s and 78' R100/7, and going to need this video soon, so whatever you do, please don't take this down. Its a great video!

[@eduki]

Great! Thanks for the explanations, i´m thinking on an upgrade to my ´82 R100RS charge system, as my motorcycle discharges the battery in 3 days when i´m doing low Km and low speed routes into the city... already checked everything, like diode board, regulator, etc... but seems to be a particular issue on this year model. Thinking on the Silent Hektik charging system, as i live in Spain and it's easier to find.

[@bobdelaplage690]

Great channel, have r100rs' 79...and nu accident made a spark on chassis while reconnecting the battery.since the no electricity on my bike, ( no lights on dashboard) no start off course...where should i suspect the cullprit? Regatds from Belgium, thanks for great content! Bob

[@BrooksAirheadGarage]

Bob, I would check the two fuses inside the headlight shell. Hopefully they are burned out so that other components were protected.

[@caughtoncamera2229]

Thank you Sir!

[@BrooksAirheadGarage]

You're very welcome Caught on Camera.

[@cozysouth]

How did you run the rear wires back through the frame to the tail light assembly?

[@BrooksAirheadGarage]

Hi TRsouth, I added a link in the video summary to the detailed documentation on my web site about how I install the complete wiring system. Thank you for asking as I forgot to add that link when I published the video.

[@advx753]

Hi, Bro. Your bike is so nicely done. I have got a problem with mine. Whenever I touch the inner main Wire from the battery the ignition will be turn on and off… would you please advise how to rectify this problem?

[@BrooksAirheadGarage]

Adv X, I guess either the connection between the wire and the terminal is loose, or corroded, or the switch is failing.

[@chrisrawlings5253]

My 89' R 100 RT"s l h switch block has gone crazy, indicators only operate when flasher button on

[@chrisrawlings5253]

Will only operate if headlight in and flasher button pressed

[@paulnarramore6828]

I find motorbike electrics utterly baffling. At present I am nearing the end of my 1977 R100/7 restoration and have found a number of electrical problems caused by me removing and refitting the wiring loom. The rear light doesn't work and the rear indicators do flash but are feint. Your video siggests I haven't fitted the earth (ground) wire correctly so back to work.

[@BrooksAirheadGarage]

Paul, I also posted an electrical circuits document on my website that maybe helpful to you: brook.reams.me/bmw-airhead-motorcycle-electrical-systems/7-series-1977-r100rs-circuits/

[@glanern]

that's some jedi shit !!

[@rustynuts82]

Great vid, just what I need right now 👍

[@BrooksAirheadGarage]

Hi BikersWelcome: I'm pleased this was helpful to you.