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Old 06-08-2014, 06:26 AM   #1
TCVox OP
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R100/7 real or mutt?

I recently came across a bike advertised as a 1978 r100/7. It's in good shape, decent asking price ($3500), but it has front drums. Is this possible? Or could this be an earlier bike with an engine swap? If it's a swap, what does that do to the value? And (one more) are drums enough to safely stop a bike with the bigger engine?
Thanks for your thoughts. I'm looking forward to finding my first airhead.
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Old 06-08-2014, 06:38 AM   #2
boxerboy81
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Can you get the 7 digit vin number (at the dipstick engine block hole, adjacent to the left carb) and check it out here...http://www.bmw-z1.com/VIN/VINdecode-e.cgi

It could be a a lot of things. The drums disappeared from the bigger bikes with the 75/6.


R100/7 specs....

http://www.bmbikes.co.uk/specpages/R100-7.htm
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Old 06-08-2014, 06:45 AM   #3
Bill Harris
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Quote:
Originally Posted by TCVox View Post
I recently came across a bike advertised as a 1978 r100/7. It's in good shape, decent asking price ($3500), but it has front drums. Is this possible? Or could this be an earlier bike with an engine swap? If it's a swap, what does that do to the value? And (one more) are drums enough to safely stop a bike with the bigger engine?
Thanks for your thoughts. I'm looking forward to finding my first airhead.
Drums? Never on an R100, and never a /7. It may look "in good shape", but that's hard to tell without a long close look. It may be a Frankenbeemer, a bike assembled out of miscellaneous parts. It may be a good deal, but can't tell.

Not first Airhead material...

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Old 06-08-2014, 10:09 AM   #4
jellycow
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A bigger engine would not really enhance the value over here, originality is more sought after. Might be different over where you live. But who cares, it's a 1000cc and that's what you're getting with this specimen.

The front drum brake will stop you just as hard with an 600 or 1000 cc engine at the same speed, the engine has no influence on that. When riding faster than a smaller engine could you're at a reasonable high speed so how often is that going to happen? Even within the range of a 600cc engine you'll have enough speed to be thrilled.

When set up correctly the drum does a good job for an 30+ year old bike, I was very satisfied with it after some fiddling. But it does want you to squeeze the lever hard. My R60/6 did brake better than my R100GS when that was OEM. A drum will also outperform a ATE disk, I had a 100/7 and a 90S and both could not brake like the drum. I've been setting up the ATE the right way, the under tank pump was in good nick, new lines and fluid, but still not the best. Went to a respected specialist, but he could not improve them. Having ridden 4 bikes with double ATE I know they are okay but not great.

You really want to find out what this thing is before getting into it. Might save you a lot of trouble. Or prove you have found a gem to keep building on and making it your perfect bike without having to sacrifice a nice example. A stated by previous posters, you will not know untill you did some research.
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Old 06-08-2014, 11:47 AM   #5
therealbatman
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There is one on our local CL with front drum brake... $3500...same bike?

The seller states "1978 BMW R100/7 new paint newer saddle bags all maintenance up to date 73,000mi runs and drives very good . get on it and ride anywhere in country."

Could have been a crashed bike, who knows? I for one like all original.
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Old 06-09-2014, 12:21 PM   #6
Rapid Dog
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Quote:
Originally Posted by bill harris View Post
drums? Never on an r100, and never...ll
ditto
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