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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: teuski on May 31, 2020, 04:54:05 PM

Title: Alternative brake pedal switch?
Post by: teuski on May 31, 2020, 04:54:05 PM
Anyone know a good replacement for an old K100 brake pedal switch?

For a quick DIY solution it would be nice to know if the switch is of opening or closing type? The button goes "up" when the pedal is depressed.
Title: Re: Alternative brake pedal switch?
Post by: rbm on May 31, 2020, 06:07:04 PM
Brake switch is normally closed.  The brake pedal maintains pressure on the switch when at rest, opening the circuit. When you press the brake, pressure is relieved and the switch closes.

There are two different types of switches.  One is a cylindrical plunger type and the other is a square microswitch.  What type do you have?
Title: Re: Alternative brake pedal switch?
Post by: 850Commando on May 31, 2020, 07:59:05 PM
Hmmm - maybe this would work:  https://www.autoelectricsupplies.co.uk/product/955/category/38
Title: Re: Alternative brake pedal switch?
Post by: kioolt on May 31, 2020, 09:06:36 PM
Quote from: 850Commando on May 31, 2020, 07:59:05 PM
Hmmm - maybe this would work:  https://www.autoelectricsupplies.co.uk/product/955/category/38

Another thing to be considered is ability of the switch to withstand the rain that it would be exposed to.
Title: Re: Alternative brake pedal switch?
Post by: Martin on May 31, 2020, 09:33:50 PM
A local electronic supply store should be able to supply something that you could adapt. Take the old one with you for comparison. And waterproof it.
Regards Martin.
Title: Re: Alternative brake pedal switch?
Post by: teuski on June 01, 2020, 01:19:49 AM
Thank you all for the tips.

I happen to have a pile of mostly Chinese scooter parts. Tried to scavenge from there but couldn't find any suitable switch. Last time i had the same need with front brake switch i used a scooter microswitch as a stopgap solution until i found a new original switch.

My bike's switch is of plunger type. At work I did find a microswitch from an old electronics spare part supply with a ready plunger assembly with both NC and NO contacts. The plunger has a smaller diameter thread than my bike so i could easily adapt it to fit in place. I did some crude weatherproofing with shrink tube and electric tape. It's not going to be pretty but i'm sure it will work  :laughing1:
Title: Re: Alternative brake pedal switch?
Post by: teuski on June 01, 2020, 11:20:36 AM
... and there it is, plug'n'play  112350
Title: Re: Alternative brake pedal switch?
Post by: Laitch on June 01, 2020, 11:29:12 AM
Looks like a female member of a one-legged alien species. Good work!  icon_cheers
Title: Re: Alternative brake pedal switch?
Post by: volador on June 03, 2020, 07:22:41 PM
Geez Mary & Joseph what a fecking waste of time. PM or email your address I send you a used serviceable switch my frugal Finnish friend
Title: Re: Alternative brake pedal switch?
Post by: teuski on June 04, 2020, 12:04:35 AM
Quote from: volador on June 03, 2020, 07:22:41 PM
Geez Mary & Joseph what a fecking waste of time. PM or email your address I send you a used serviceable switch my frugal Finnish friend
Can you really call it a waste of time if it keeps me on 2 wheels instead of four while i find a correct one?  :laughing1:

Thanks for the offer, i'll PM you right away.
Title: Re: Alternative brake pedal switch?
Post by: volador on June 04, 2020, 12:29:53 AM
Touché

give me a few days too have Mr. Bentley search the spares inventory find the bloody thing