Search found 523 matches

by Bruce Frey
Thu Jan 11, 2018 10:44 pm
Forum: Antique (1923-1945) Motorcycles
Topic: R12 valve adjustment
Replies: 9
Views: 466

Bicycle tools also make a

Bicycle tools also make a good starting point. Thin and relatively inexpensive.

Bruce
by Bruce Frey
Wed Jan 03, 2018 2:01 pm
Forum: Antique (1923-1945) Motorcycles
Topic: R12 valve adjustment
Replies: 9
Views: 466

I generally do it as Bigsieuk

I generally do it as Bigsieuk does. If you measure the gap and know how much adjustment is needed, you can calculate how far to turn the adjuster by knowing the thread pitch (I have forgotten what it is, however). e.g.,if the thread pitch is 1.0mm, then 1/4 turn is 0.25mm. It will probably take a co...
by Bruce Frey
Fri Dec 22, 2017 12:40 pm
Forum: Antique (1923-1945) Motorcycles
Topic: R6 Muffler color
Replies: 9
Views: 436

I’ve never seen period photos

I’ve never seen period photos of R5/6 with anything other than chrome mufflers. I agree that the rims on the ‘36 R5 were chrome and they went to paint in ’37 along with the R6. Period replacements were likely painted, however. The painted mufflers seemed to appear in ‘38 as chromium was diverted to ...
by Bruce Frey
Fri Nov 17, 2017 11:36 pm
Forum: Antique (1923-1945) Motorcycles
Topic: Serial numbers
Replies: 2
Views: 162

I agree that the rondels

I agree that the rondels should be there. My ‘36 R5 and my R6 have them. Having said that, I have another R6 frame without rondels, but with an “A” suffix. I think this is a replacement frame.

Bruce
by Bruce Frey
Tue Oct 03, 2017 8:20 pm
Forum: Antique (1923-1945) Motorcycles
Topic: Correct wiring connectors for pre-war BMW bikes
Replies: 5
Views: 265

Since all the wiring on a

Since all the wiring on a motorcycle is short, it is all point to point without splices or connectors. If are trying to do something like hardwire sidecar lights without using a plug, I would use whatever modern connector you want, but hide it under the tank. I have a Bosch Catalog that shows their ...
by Bruce Frey
Mon Sep 25, 2017 10:48 pm
Forum: Antique (1923-1945) Motorcycles
Topic: Correct locking washers for vintage pre-war BMW bikes
Replies: 7
Views: 325

For good measure, here is an

For good measure, here is an R71 Data Sheet.

Cheers,

Bruce
by Bruce Frey
Mon Sep 25, 2017 10:41 pm
Forum: Antique (1923-1945) Motorcycles
Topic: Correct locking washers for vintage pre-war BMW bikes
Replies: 7
Views: 325

Here is the R51-R71

Here is the R51-R71 Ersatzteilliste. It is an old scan of a scan but it is mostly legible. I have an original in good condition that I keep meaning to scan, but have not found the time to do it yet. You will next want a good German-English technical dictionary. Two good ones are: Two Wheeler Technic...
by Bruce Frey
Mon Sep 25, 2017 8:22 pm
Forum: Antique (1923-1945) Motorcycles
Topic: Correct locking washers for vintage pre-war BMW bikes
Replies: 7
Views: 325

I'll post a copy for R51-71

I'll post a copy for R51-71 when I'm next at my computer.

Bruce
by Bruce Frey
Wed Sep 20, 2017 9:04 pm
Forum: Antique (1923-1945) Motorcycles
Topic: English R52 Handbook
Replies: 6
Views: 319

R51-R71 English Handbook

Here it is. I hope this works because it is right at the max size.

Bruce
by Bruce Frey
Tue Sep 19, 2017 7:27 pm
Forum: Antique (1923-1945) Motorcycles
Topic: BMW R71 rear light bracket screws
Replies: 2
Views: 164

M6x10 round head, black oxide

M6x10 round head, black oxide type finish. Slotted.......I don't think Phillips head was used back then.