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bhontz
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The clymer manual says that their wasn't any front brake light switch available on 70-73 /5's - mine did not have one. However i have noted other /5's (pictures) of the same vintage that do. I've also seen pictures of the front brake light switch which still seems to be available. Does anyone know if it is possible to tap out the "hole" within the front brake handle to accept the front brake light switch?

schrader7032
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Front Brake Light Switch

I'm sure you're sure, but is this really true that your /5 doesn't have the front brake light switch? I've checked two documents, the ChiTech electrical manual...it says that the /2 didn't have such a switch (I know, I have a /2) but that the /5s did. Also, my Haynes repair manual shows an electrical diagram for the /5s as have both a front and rear brake light switch.

Seems I've heard about guys with /2s converting over to the /5 hand controls so they can then take advantage of things like the brake light switch.

Kurt in S.A.

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'78 R100/7 '69 R69S '52 R25/2

Darryl.Richman
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Front Brake Light Switch

Kurt, I'm pretty sure that the last year US model /2s had a front brake light switch, that perhaps came in with the side reflectors on the headlight and rear fender.

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bhontz
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Front Brake Light Switch

The front brake/throttle casting has a hole drilled in (at the office now so this is a GUESS) of about 1/4 in diameter. Looking into the hole, you can see the front brake lever's movement. Knowing something about the switch for the /5 (viewing a pix online) i can see where the switch could possibly thread into to the brake/throttle casting and contact the brake lever. However, the hole is not threaded. My question boils down to - should I buy the switch (about $30) assuming that I can tap the existing hole in the brake/throttle casting and thread in the switch. I can handle the wiring.

schrader7032
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VBMWMO #7032
San Antonio, TX
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Front Brake Light Switch

I did a little searching on the Yahoo /2 forum, and this is a topic for people who want to switch from the /2 controls to /5 controls in order to pick up the front brake light switch option. As Darryl said, it seems that the '69 (at least) US model /2s had this type of fitment, as this was the precursor to the /5 models hitting the market. But from what I can tell, all /5 models should have had the front brake light switch standard. If yours doesn't, I'm wondering if maybe someone fitting the early /2 controls (ie., the non-US models).

I did find a post by Vech who runs the vintage parts/repair shop down in Mississippi...he also supports bikes past 1969 as well. He mentioned part number 32 72 1 232 981 which is the complete throttle/lever assembly for the R50/5-R90S. The switch is 61 31 1 351 662. Of course wires would have to be run to the switch.

Duane Ausherman also mentions on his website a discussion about a specific part of the throttle casting, the wedge. On one of his pages, he has this picture:

In the picture in the upper left is the threaded hole for the brake light switch. Is this similar to your situation and it's just unthreaded?

It would seem to me that you could completely tap the hole to fit the threads for the switch. I've never seen one of these up close. My /2 is the Earles fork, so it does not have the hole for the switch.

Kurt in S.A.

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'78 R100/7 '69 R69S '52 R25/2

bhontz
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Front Brake Light Switch

nicely done with the picture! , thank you. Yep, mine has a hole right there but it is not threaded. Basically, I was trying to see if I could simply pull the assembly off, thread the hole and purchase and install the switch. While it's hard to tell if the hole in my assembly is the same size (meaning I could simply just tap it out) it looks promising enough for me to pull off and tote it down to my local BMW deal to compare with a brake light switch. Thanks for your assistance! BTW - I also have an '62 R50/2 and while the casting is similar, there isn't any hole within the R50/2 casting. I haven't looked over enough early /5's to tell what the deal is on the front break switch, i just know mine does not have one, and the Clymer R-Series manual page 422 says "note: 1970-73 models are not equipped with a front brake light switch". Since mine didn't have one, i figured that was accurate.
BTW - if anybody knows where to get the WEDGE shown in that picture, i'd be happy to buy a half-dozen -- i've been told they are not available anywhere (my dealer).

schrader7032
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Front Brake Light Switch

Vech lists them on his website http://www.benchmarkworks.com:

32 72 2 072 223--wedge for Magura grip R26-R90S

You might also try Ted Porter at http://www.beemershop.com. Also, Tom Cutter at http://www.rubberchickenracinggarage.com.

A couple of other thoughts would be:

Bob's BMW and Repsycle; maybe a salvage yard like Airhead Salvage at http://www.airheadsalvage.com. Mike's a decent guy but I've not heard a lot from him lately...I think he has a "real" job. I know of a few other salvage yards....I haven't done business with them, but I have some other links.

Kurt in S.A.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

bhontz
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Front Brake Light Switch

you guys are the best! thanks again.

now time for true confessions - wondered back out to garage, this time with my glasses on --- the brake/throttle housing IS threaded -- guess all i need is the switch and wiring, all of which seems to be still available. Guess this bike USE TO have a front brake switch after all.

guys thanks again.[/list]

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