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312Icarus
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Joined: 07/15/2016
Posts: 418

My book is useless about removing the armature from a /2. Is the hardened steel rod the same size for both the mag and the armature (1/8”x 2 1/2”)?

As I am guessing the way the armature comes off is by removing the Allen bolt, inserting the steel rod, then crank in the Allen bolt against the end of the crank. In that case what prevents the rod from simply finding the inside of the crank threads and mucking it up?

I must be missing something. Advice please.

Icarus

Still trying to track down a chirp and have tried it with the field coils removed, still chirping ~1500-2000 rpm, sure seems like behind the genny maybe?

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6844
Snowbum shows what you need

Snowbum shows what you need near the bottom of this page:

http://bmwmotorcycletech.info/trbleshootalt.htm

Cycleworks or Northwoods Airhead and Euromoto Electrics sells the tool...I highly recommend getting the tool rather than trying to get by with something homemade.

The situation is that the end of the camshaft has internal threads. The inside of the rotor has threads. Notice when you put in the stock bolt. It threads for a while, then becomes free and then begins to thread again. That's the dual sets of threads.

So, with the tool, the first set of threads are removed. So when you put the tool in, it bottoms out on the camshaft and the threads on the inside of the rotor are the only ones that engage pushes the rotor off the taper.

__________________

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

312Icarus
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Joined: 07/15/2016
Posts: 418
Going it thanks. I think I

Going it thanks. I think I will order a tool rather than trying to grind a hardened bolt.

Icarus

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