Vintage BMW Motorcycle Owners

A friend is preparing his R60/2 engine to send in to Vech to have the bottom end redone. He had installed the MZB 12v ignition system and that needs to be removed before he ships the bare engine. I took my standard rotor puller to him, but it's too long. It bottoms out before any of the threads can engage. Makes sense since the bolt that holds the rotor onto the crankshaft is so much shorter.

What does it take to pull this rotor off?

Could possibly make your own puller bolt with a shorter “no thread” portion....maybe chuck a Class 10.9 bolt up in a drill or something and use a 4 inch disc grinder to grind off some threads? Maybe a little crude but it could work.

Is this what you need to remove
it is just a oil seal plug for the back of the old mag that was removed and I dont think you have to remove it to remove the timing case cover and also to remove the camshaft

A puller bolt wont work as their are no threads inside of it like the magneto
After removing the bolt a little heat and it should come off

Tommy

I realize that something could be made...certainly a high strength bolt. I was a little surprised when the standard puller didn't work...and that's because the original rotor in the generator is so much longer than what is there to replace it. Tommy, the thing that's being pulled is the grey round thing in the bottom of one of your pictures. The original magneto is no longer there.

I'm guessing that this single rotor he has installed is the 12v generator/alternator and ignition system combined. There is a pickup on the outside of the rotor that senses when a small spot spins around each revolution which ends up being the timing side of things.

Oh ok then you need this in pic below from my installation instructions
To disengage your new rotor again, you will need a puller M27x1,25 (part-no.: 99 99 799 00 -Not provided!-).
If you have this then maybe you just need a bolt
I can measure mine if needed
Tommy

Tommy -

Thanks. My friend is supposed to check his instructions for the rotor. What does the big black nut screw into? We removed the existing bolt holding the rotor in place...strangely, there must have been 6-7 flat washers under the head of the bolt...probably just to take up extra space. I don't remember looking carefully enough to see what was exposed by the washers, but I don't remember seeing a larger threaded area.

I took a few pictures of mine. It looks like the middle bolt presses on the end of the crank but I think I loosened the middle bolt and pressed on that instead because I was not happy pressing on the crank. I honestly forget and it was a non-issue. I had mine off several times.

See pics below.

OK, that all makes sense. I'll pass the info on. Thanks!

It is funny that this is a option from now the Vape kit as is it needed to remove the rotor
as Jambo states to you need to remove the rotor to get the proper timing
Joe Ropose included this puller setup when I bought this when he was the importer for MZB
You most likely need to reposition the rotor a few times after reinstalling it to get the timing correct as it is not keyed to the crankshaft and the timing pickup is not adjustable
But once set no more adjustments for you timing
You can get this from Vape for about 12.00 US dollars not sure shipping costs
If you need one sooner I could loan mine to you but you must source one for further use
Tommy

Yes that screws into the rotor and then when the screw is tightened and the rotor gets pulled off
It is noted in the instructions that dont use any other means as the magnets inside may become dislodged
I tried this on a snowmobile rotor with a puller and stopped as I was using too much force with the gear puller so I decided to give it a little shock with a hammer I did get it removed but had to replace the rotor as some of the magnets inside did fall off

Here are the installation instructions posted for the MZB setup

http://www.powerdynamo.biz/eng/systems/ ... 81inst.php

Tommy