MZ TS 150 start problem

[prinz_restoration]

Hello, I am the owner of MZ TS 150, year 1975. and right now i have a problem with the ignition. A week ago, I decided to prepare it for the season and start it after a long time of standing. The engine started normally and I decided to drive a little through the yard. After 2 minutes of driving, the engine stopped because I did not open fuel supply. After I pushed the motorcycle back to the garage, my wife called me to rush to the shop and I forgot to turn the key and the battery was discharged to 2V. Unfortunately, the key was in the ignition position for more than 12 hours. After I charged the battery with the charger, I could not start the motorcycle again. On the first day of trying to restart the engine, there was a normal spark at the spark plug. I thought it was the carburetor (no fuel) , so I removed it and adjusted the float. After I put the carburettor back on and tried to start it again, the red light on the speedometer came on and since then I haven't had a single spark at the spark plug. Please help what could be the cause and how to fix. Thx

[Blurredman]

The problem with leaving the key on is not only that it will drain the battery, but it may also be energising the coil if the points are closed. If this is the case, then extended lengths of time with the coil energised but not releasing the store does promote degredation.

If your battery is now charged and has a decent voltage, then I might check with a different spark plug- but I would seriously think that you need to try with a different coil!

[prinz_restoration]

I ordered a new ignition coil https://kultmopeds.de/Zuendspule-6V-fue ... l-Zuendung and capacitor, so I'll try it out this week when it arrives. When you say coil, I assume you mean the wire that goes from the ignition coil to the spark plug?

[Blurredman]

Although I've never actually had a condenser/capacitor problem, it doesn't mean that It won't. However I think that's rare.

I think yes, the coil that you linked. Though I'd like to hear other people's views too (preferably before you ordered anything).


Ideally, and yes I understand you need to have the availability of spares directly with you, sometimes I have to swap parts from other bikes.
Though I do have coil, condenser/capacitor, points, rectifier, stators etc etc all on the shelf ready to go for handy quick replacement for testing these types of problems.

[Gerryman Ts125]

Have you inspected this part (below in green) as it has a say so in starting, charging, misfiring. But like a duff condenser the contract breakers (and this part) will be burnt, charred or melted. Your coil should've been hot enough to fry a egg or flesh.
A multimeter is a necessary extra when dealing with any electrical fault..

[DAVID THOMPSON]

if the points were in a closed position you probably have a coil with a toasted primary winding
the wire from coil to spark plug may be good or bad

[prinz_restoration]

W

if the points were in a closed position you probably have a coil with a toasted primary winding
the wire from coil to spark plug may be good or bad

. What would be primary winding? Winding in ignitiona coil or?

[dave47]

Blurredman is probably right about the coil being fried, but it might just be a worn out battery that can only hold enough charge for one or two sparks. I would try recharging it first before fitting new coil etc.

[prinz_restoration]

Is good if i put 6v - 12ah AGM Panther battery for MZ? Now I currently have a classic acid battery of 6v 11 Ah (6n11a model)

[dave47]

I don't know. They are not really designed for motorbikes, but I think some people have used similar ones successfully. I've only used lead acid batteries like the one you have fitted, which is the correct one for the bike.

[prinz_restoration]

Blurredman is probably right about the coil being fried, but it might just be a worn out battery that can only hold enough charge for one or two sparks. I would try recharging it first before fitting new coil etc.

I recharge battery but still no spark, ill order new ign. coil and try after Easter.

[Gerryman Ts125]

If you really want to start a Dynamo charged Mz. Then ( not advisable for a long running time) stick 12 volts though the fuc&er.
I used to do this, but don't try a car battery. Unless it's very low in amps. And it's not in a car.

This will start any Mz that has a dynamo. Start it up, let it warm.
.
Then connect the six volt battery and let the dynamo charge/run on that once the engine is warm. It's air cooled.
So warming up doesn't take long.