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Karcoma Petcock on/off/reserve?

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hooverbj
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Karcoma Petcock on/off/reserve?

Post by hooverbj »

Really stupid question... I put a new Karcoma Petcock on my 66 R50/2 4 years ago after the original one began to leak. To this day I'm still not sure what position turns the gas on or off? I think I've been putting it on reserve from the beginning... by putting the long part of the switch facing down. There is Res., Zu/OFF, AUF and ON. Now I'm guessing the short part of the switch should be facing ON and for Reserve the short part should be facing up?
Thanks in advance,
Brian Hoover
1966 R50/2
2004 R1200 C
Cedar City, Utah

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wa1nca
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Re: Karcoma Petcock on/off/reserve?

Post by wa1nca »

Yes when it is down is on
Up is reserve
side to side is off
https://bmwclassicmotorcycles.com/index ... m20x1.html
Tommy
Tommy Byrnes
54 R51/3, 55 R50/Velorex 560 sidecar, 64 R27, 68 R69US, 75 R75/6
Ashfield, Ma
USA

strichzwei
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Re: Karcoma Petcock on/off/reserve?

Post by strichzwei »

Auf=open
Zu=closed

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jeffrey
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Re: Karcoma Petcock on/off/reserve?

Post by jeffrey »

Yes. Short side is the "pointer". The "handle" is not the pointer. Hope that makes sense...

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schrader7032
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Re: Karcoma Petcock on/off/reserve?

Post by schrader7032 »

jeffrey wrote:
Thu May 06, 2021 1:10 am
Yes. Short side is the "pointer". The "handle" is not the pointer. Hope that makes sense...
??? Actually, the "handle" IS the pointer.
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.

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nebseyer
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Re: Karcoma Petcock on/off/reserve?

Post by nebseyer »

A300F746-0546-4562-B068-97CC5110C350.jpeg
This is the on Position.

strichzwei
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Re: Karcoma Petcock on/off/reserve?

Post by strichzwei »

A picture is worth a thousand posts!
S

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schrader7032
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Re: Karcoma Petcock on/off/reserve?

Post by schrader7032 »

FYI...I read on another forum where someone found that round label was installed upside down. Doesn't make sense but there's that!!
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.

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wa1nca
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Re: Karcoma Petcock on/off/reserve?

Post by wa1nca »

some people take off the round label to make it look more vintage
maybe reinstalled it upside down
Tommy
Tommy Byrnes
54 R51/3, 55 R50/Velorex 560 sidecar, 64 R27, 68 R69US, 75 R75/6
Ashfield, Ma
USA

strichzwei
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Re: Karcoma Petcock on/off/reserve?

Post by strichzwei »

Kurt, to add to that the tubes on the inside could be swapped, shortened or missing - always a good idea to check or test on a new to you bike!
Scott

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