BMW K bikes (Bricks)

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1Back to top Go down   DIY Starter Switch Empty DIY Starter Switch on Sat Sep 23, 2017 1:00 pm

uhoh7

uhoh7
active member
active member
If the bike will push start and runs fine, and the starter is clean and responds to a jump, but either OEM switch/rely is not working or unwanted, then a new starter switch is pretty easy as you see. 

There is a good spot on the coil cover, and last shot shows cable routing. Basically all you need: high amp switch, heavy gauge wire, two short lengths. Drill a hole in coil cover about 20mm inboard from inner edge, centered between mounts. Route one cable to starter and carefully attach other end to battery. Mind your connections are not going to pop loose. 

DIY Starter Switch 37265289321_2498c31fb5_b
Starter switch by unoh7 , on Flickr


DIY Starter Switch 36555486304_7772ae23ec_b
Starter switch by unoh7 , on Flickr

DIY Starter Switch 37218476406_d7cb0e3872_b Starter switch by unoh7 , on Flickr

DIY Starter Switch 36555487014_91e7230dd2_b
Starter switch by unoh7 , on Flickr

Once I learned the oem switch just allows a direct short unfused feed from battery, then I figured a work around should be easy. The button is big and not going to be pressed by accident. Yes it will turn the bike over with key off. Smile

DIY Starter Switch 37010251610_ce0fd3425d_b
Switch by unoh7 , on Flickr



Don't get me wrong: I would prefer the OEM method working, on my own bike. But this works fine, it seems.

    

2Back to top Go down   DIY Starter Switch Empty Re: DIY Starter Switch on Sat Sep 23, 2017 1:42 pm

Chocolate

Chocolate
Life time member
Life time member
Hello!

Nice solution.
Thanks for sharing.

Cheers


__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

3Back to top Go down   DIY Starter Switch Empty Re: DIY Starter Switch on Sat Sep 23, 2017 1:50 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Use tinned #12 or #10 AWG stranded wire and crimp-on ring terminals.  I promise that you will regret wiring it the way you did in a year or so.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down   DIY Starter Switch Empty Re: DIY Starter Switch on Sat Sep 23, 2017 2:49 pm

duck

duck
Life time member
Life time member
Double ditto on using ring terminals.

Another option would be to mount it similarly to the BMW mount for a Powerlet socket. Part 4 in this diagram.

DIY Starter Switch Dbvis-3045358271077770284


__________________________________________________
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 (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

5Back to top Go down   DIY Starter Switch Empty Re: DIY Starter Switch on Sun Sep 24, 2017 2:33 pm

uhoh7

uhoh7
active member
active member
Thank you for replies.

I'm using 100% copper 12 gauge speaker wire with heavy insulation. The best in my workshop Wink I will monitor the insulation to be sure it's not melting.

Thanks for idea attach to rings and connect them to the switch. I have seen so many crimped and soldered wires come loose. I put this together very carefully and then examined it closely. Originally I was going cover each side with insulation. But the sides were well separate and after I cranked the screws the attachment seemed very firm.

Per concerns here: I will inspect. Long run, I hope to find a good clean handlebar control. Smile

But to all:

While even a MX kill switch will work about 10 times in a pinch, to be reasonable:

60 amp switch.
12 gauge wire with heat resistant insulation.
Strong connections.

    

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