MZ/MuZ Riders

Hello. I have a ETZ 125. The problem is, that there is no spark so the engine doesn't start.
I have checked connections and it seems that they're ok. I have cleaned breaker points with sand paper, install a new NGK spark plug, checked ignition timing. But it still doesn't start.

What else could be wrong?
Can someone tell me, what connections ONLY have to be connected, that the engine starts (without lights, ignition switch,..), just the most important connections to start it up.

Thank you!

It could be the coil, ht lead, or plug cap.
To check the coil, disconnect from the wiring loom, connect a wire to the positive side of the battery and one of the coil terminals.
Connect a wire to the other coil terminal, and brush this against a good earth on the frame or engine.
With the spark plug removed from the engine and earthed on the cylinder head, you should see a spark if the coil, ht lead and cap are ok.
If no spark replace the ht lead and plug cap with new items and try again.
If still no spark, you need a new HT coil.

Thanks! I will try this and report soon.

Good advice from others, but can't remember if the 125 has a capacitor in the ignition circuit. Could it be a faulty capacitor? Had similar problems on my ETZ 250, and this was the cause.

if it has point ignition, then it will have a condenser right next to the points