More Schwalbe problems ( also english)

hmm.. I'm not quite sure if it is spring loaded, but I couldn't imagine it to work without a spring. When the level rises, the valve opens, but when it sinks again, I think it needs a spring to get pushed back (or gravitation:D).
But that would mean that your engine gets to mouch gas. What does your spark plug look like?

Hi.

The needle valve opens, if the level sinks and close if the fuelchamber is full. It's the pressure of fuel, that close the valve.

Greets

Matze

P.S. My english is not the best and a little bit rusty, sorry.

i think your problem could have several causes.

1st possibility: fuel supply. the needle valve (yes, the german term is schwimmernadelventil) is not spring loaded, it only moves because of the fuel's weight inside the tank (opening) and the floater (german: schwimmer) rising when the fuel level is reached (closing).

you might want to check if your needle valve is worn out. does it close dependably? also the fuel level might need adjusting, this is done by bending the floater. correct values can be found here:

2nd option: bad contacts somewhere in the ignition system.
perhaps the spark plug connector is worn out and does not clamp to the plug well enough, so that bumps can shake it off. also, the ignition cable contacts in sparkplug connector and coil tend to rot (especially in the coil). once you're at it, check the ignition coil's ground connection and the brown/white cable departing from ignition switch clamp 2 for bad contacts.

good luck!

The "Schwimmernadelventil" you referred to is a small valve inside the carburator, that allows the fuel level to be steady by opening if the level goes down: the "Schwimmer" will sink with the fuel, and open the "Schwimmernadelventil".

I dont think that you meant the Schwimmernadelventil in your first post, but you probably meant the long needle which is pulled by the bowden cable leading to the gas handle, didnt you? That part should definitely be spring loaded, with a big spring which sits right under the cap the bowden cable goes into.

Edit: The Schwimmernadelventil is part no. 8 in the following picture. The spring that should pull back the bowden cable is part no. 13, and sits below the cap no. 2.

Loosing fuel while standing is not normal, but common to simson bikes. It can be corrected by (a) buying a new Schwimmernadelventil and (b) correctly setting up the Schwimmer. You have to bend the little lashes on the Schwimmer until the measurements shown above are perfectly reached. The Schwimmer will then close the Schwimmernadelventil when the carburator is full, so that you should not loose fuel. Nevertheless it is recommended to close the fuel valve, because a bit of fuel might still evaporate through the Überlaufbohrung, which will of course make you loose a bit of fuel again. This is not much though.

Also, if you still have disassembled the carburator, dip the Schwimmer into some hot (!) water. If you can see bubbles coming from it, it is not sealed anymore and has to be replaced because fuel can get into it, which will lead to sinking of the Schwimmer, which will of course reopen the Schwimmernadelventil.

if the needle in ventil have a drift (not up and down) then its defect und need to replace.
The best method to calibrating the carburetor is the "Senfglas".
Use a glas and put on the open carburetor->mark the Setpoint on glas and setup the "schwimmer".

actualy it give trouble with this "schwimmernadelventil" in action he shrink a little and not closed correctly. ->replace with new part.
We it is??

Good morning.

As you talk it sounds like the dealer has bought "Blanko-Papiere" on ebay or somewhere else and complete them self. This is not legal!!! Only two types of Vehicle papers are legal. The original ones, which were delivered with the Schwalbe and the new type, printet by the "Kraftfahrtbundesamt" or short KBA. Somtimes its very difficult to distinguish the original from the faked Blankos. Best is, you post some pictures of the papers, so we can see it and check the originality.

Greets

Matze

The "replika" papers are not legal in any way. You could get into serios trouble by using them.

If you want to use your vehicle legally, just write an email to the Kraftfahrtbundesamt in Germany. Tell them the exact type and year of your vehicle, also tell them the number on the frame. a few days later you will get new papers printed on special paper, and everything is fine.

you will have to pay the postman directly, the sum is just below 30 euro AFAIR.

Dont bother with filling out the form on their website, that is not needed. just write an email.

Of course, if the bike is stolen they will notice that with the number you sent them, so be sure not to ask for papers for a stolen bike.

if these are the only papers you've got you should definitively get some legal ones. fortunately, this is quite easy for pre-1992 simsons. all you have to do is write an email to the kraftfahrtbundesamt ( mopedabe_beitrittsgebiet@kba.de). this email should contain:

*your name and adress
*exact type of bike (in your case KR51/2E if it's the same scoot as above)
*VIN (to be found stamped into the frame under the seat)
*year of manufacturing
*your phone number for questions that may occur

normally, the processing only takes a few days. then, the mail guy will ring at your door and want approx. 25€ for your fresh paperwork - simple as that!