Looking at a 57 Simson SR2

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re: Looking at a 57 Simson SR2

Postby John » Tue Jul 03, 2012 7:07 pm

Other?
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re: Looking at a 57 Simson SR2

Postby kawtoy » Tue Jul 03, 2012 8:11 pm

I have lots of bikes and the reason I went to this guys house was to look at a 69 CB175. I didn't even know about the Simson until I saw it hiding under a blanket in the corner of his shop. We made it a package deal for both of them. I am picking it up tomorrow. It is on the road and registered now. It scored a 96 out of 100 at the last motorcycle show it was judged at. I won't be keeping it though. My friend had already made me an offer I can't refuse. I will however make sure to put a few extra miles on it before I hand over the keys.
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re: Looking at a 57 Simson SR2

Postby John » Wed Jul 04, 2012 4:17 am

Great score there also. Would make a good Lake Erie Looper!. I am doing up a Honda MB5 right now. Down to the final front wiring hookups and then a motor tear down,buildup.
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re: Looking at a 57 Simson SR2

Postby kawtoy » Wed Jul 04, 2012 12:23 pm

Can anyone school me on the ways of the 2 stroke? I have compression, ignition and fuel so why won't it even cough? With 4 stroke bikes if you can get it to at least cough and show signs of life you can adjust the timing and carbs to get it running right. This thing is kicking my butt. Am I missing something silly? There is a switch on the left grip but not sure what it does (it toggles up and down and also has a button which must be the horn). Then on the headlight there is a three way switch. From videos I have seen it looks like the middle position is "on", right is "off" and not sure what left is. I have tried every possible combination of switches but still nothing. Either my timing is way off or I am missing something the 2 strokes do different than all my other bikes.
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re: Looking at a 57 Simson SR2

Postby kawtoy » Thu Jul 05, 2012 4:17 pm

Damn Damn Damn. What the heck am I missing? I know it will end up being something silly but for now it really has be baffled. When this thing finally starts up I am going to go for the slowest parade lap ever.
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re: Looking at a 57 Simson SR2

Postby H-BRU » Mon Jul 09, 2012 6:12 am

Simsons are very common here in Hungary, though SR2s are somewhat rarer than later models.

There is plenty of information to be had on the internet, though mostly in German.

For a user handbook try a Google search for:
"Simson SR2 Bedienungsanleitung".

For a repair manual:
"Simson SR2 Reparaturanleitung"

Good Luck!!!!

Bruce
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re: Looking at a 57 Simson SR2

Postby kawtoy » Tue Jul 10, 2012 3:41 pm

Thanks H-BRU. I have been able to find some pretty good info using google translate. I found the problem, it needs a new coil. I was getting spark but it was intermittent. Now it has stopped. I looked at the coil and the winding is broken. It has a base unit with three coils. I have found some of the units on German Ebay but no one will ship to the US. I will have to keep looking and hopefully I can get someone to send me what I need. I will be at Mid-Ohio Vintage days next week, largest motorcycle swap meet in the world but I doubt I will be able to find the part there since they were never sold here in the US. Oh well, she sure does look pretty sitting in the garage next to my 73 Triumph!
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re: Looking at a 57 Simson SR2

Postby H-BRU » Fri Jul 13, 2012 3:35 pm

I did a quick search and there are places in Germany that will ship worldwide, problem is their charges are pretty extortionate - the 2 sites I looked at have a flat charge to ship outside Europe of 55EUR (Ouch!).

Incidentally, I have been told that a coil from a KR51/1"Schwalbe" will also fit (and by implication other bikes of the "bird" series(Star, Spatz, Habicht etc)), but suspect they are equally rare on your side of the Atlantic.

There may be other possibilities:

1) You may find a local firm to rewind the coil (somewhere that specialises in electric motor rewinds etc) Some people have bought a spool of enamelled coper wire from Radio Shack and rewound their coils themselves but it's not a job for the faint-hearted.

or

2)If the fault in your coil is a break (not a short) in the secondary winding and the primary winding is still OK (you can check by connecting an AC voltmeter between the chassis ground and the terminal on the capacitor), you can connect a wire between the capacitor terminal to an external AC ignition coil to provide a spark. I did this some years ago on an Anker moped that I had and it worked fine. The coil I used was out of my junkbox and was a Mitsubishi that originally came off a Yamaha (DT80 or FS1E I think). Almost any coil designed for a Flywheel magneto system should work (but probably not one designed for battery-coil systems).

It would be a shame not to get your SR2 running, as I said in my earlier post there are plenty still running around over here - not as "collectors items" but as regular transport - most of them are pretty ratty after 50 years or so, but I did see a nicely restored example a few years ago - see attached photo.

Bruce
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re: Looking at a 57 Simson SR2

Postby kawtoy » Sat Jul 14, 2012 1:35 pm

I found a guy in Germany who did a total rebuild of an original unit for me. All new coils and condenser. I doubt it will be here in time for the big vintage motorcycle show next week but at least it should be back on the road soon. I do no think I will keep it very long. Not many places to ride around here at 32mph without getting run over. I will be proud to get it running again and back into service so someone else can enjoy this beauty.
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