Search found 112 matches

by spider rust
Fri Dec 25, 2020 5:39 am
Forum: Antique (1923-1945) Motorcycles
Topic: Vintage Magnetic Speedometers restoration
Replies: 0
Views: 896

Vintage Magnetic Speedometers restoration

Some time ago I bought a WW2 Veigel Tachometer from Germany for my 1938 BMW R12, with a near new dial plate for the side car version speedometer. The issue with these is the loss of magnetism from the magnet rotor. I took it to a professional speedometer restoration, and they tested the magnet which...
by spider rust
Fri Dec 11, 2020 4:15 am
Forum: Antique (1923-1945) Motorcycles
Topic: Valve guide clearance R12?
Replies: 4
Views: 774

Re: Valve guide clearance R12?

The cylinder exhaust valve ports can be blue printed, opened up to allow better smoother and more air flow over the valve seats and out of the exhaust ports, reducing the heat build up, increasing performance, and with the bonus of modern fuels is much better. Remember that engine was designed to ru...
by spider rust
Fri Dec 11, 2020 4:07 am
Forum: Antique (1923-1945) Motorcycles
Topic: Question about repro SUM carbs for R12
Replies: 1
Views: 382

Re: Question about repro SUM carbs for R12

The originals used a brass float bowl lid nut, a restored original will always be superior in quality and function to a copy in my opinion.
by spider rust
Tue Apr 28, 2020 6:11 pm
Forum: Antique (1923-1945) Motorcycles
Topic: BMW R12 Frame weight
Replies: 0
Views: 817

BMW R12 Frame weight

Does anyone know the weight of the bare frame on the BMW R12.
by spider rust
Mon Mar 30, 2020 6:22 am
Forum: Antique (1923-1945) Motorcycles
Topic: 1938 BMW R12 Ignition/Headlight Key
Replies: 3
Views: 640

Original key scratching paint

My restoration is back to its original WW2 finish in all detail. Which is correct for its provenance. All these pre war R12's were conscripted into the Wehrmacht, why restore them in civilian disguise with no empathy to their prev owners who probably were obliterated during this dreadful historic pe...
by spider rust
Sun Mar 29, 2020 10:25 pm
Forum: Antique (1923-1945) Motorcycles
Topic: 1938 BMW R12 Ignition/Headlight Key
Replies: 3
Views: 640

BMW R12 Ignition Key

See attached, NO BMW TRADEMARk or PART NO.
But the design is correct R12, and it is original as it was not supplied by BMW.
by spider rust
Mon Mar 23, 2020 9:56 pm
Forum: Antique (1923-1945) Motorcycles
Topic: 1938 BMW R12 Ignition/Headlight Key
Replies: 3
Views: 640

1938 BMW R12 Ignition/Headlight Key

Does anyone know who the manufacturer was that made the headlight key?
And what the correct length of the steel post should be?
by spider rust
Sat Oct 26, 2019 12:02 pm
Forum: Antique (1923-1945) Motorcycles
Topic: BMW R12 Tank Deckel
Replies: 2
Views: 486

Tank Deckel without breathet holes

Unfortunately no gaps around the edge.
I will drill the holes.
by spider rust
Fri Oct 25, 2019 2:54 pm
Forum: Antique (1923-1945) Motorcycles
Topic: BMW R12 crankcase welding
Replies: 1
Views: 440

BMW R12 crankcase welding

The metal mix makes welding very difficult if not impossible.
Has anyone had success without creating a moonscape?
by spider rust
Tue Oct 22, 2019 4:02 pm
Forum: Antique (1923-1945) Motorcycles
Topic: BMW R12 Tank Deckel
Replies: 2
Views: 486

BMW R12 Tank Deckel

This cap has no breather holes, yet
another version has them.
Surely this cap is not fit for purpose.