MZ/MuZ Riders

Hi, my Mz etz 251 has been laid up for a long time
And now wont start, they seems to be no spark and the coil is getting hot
The bike ran fine a while ago.
Can anyone help.
Thanks dave.

Seems to be no spark? there is either no spark or spark, surely?

Electronic ignition or contact breakers?

If your coil is getting hot it's constantly being charged, because for instance your points are corroded shut. Or something else is wrong. I think the advice is to check your ignition.

On the up side: the battery seems to work.

Hi,took engine case of and the electronic ignition
was very corroded.
I cleaned it up best I could but no joy
Can these be repaired or can you still buy new ones.
Thanks dave.

Hi Dave,

pics would help.

Yes, you can buy anything for these bikes, see for instance viewtopic.php?f=5&t=9257

Hi, cannot get picture to load?
Does anyone know how to remove all of the electronic ignition.
I wanted to see it had corrosion behind it.
Thanks Dave.

Sounds like the electronic box or sensor is fried if the coil is getitng hot as it is continuously passing current.

Could understand if it was points stuck closed.

I had an ETZ 301 and that had electronic ignition - the sennsor was easy enough to remove as if memory serves it was obvious which screws held the sensor in.

Good luck.

Just an update, put plug in and it did not spark but when put back in bike I kicked
The engine over a few times and nothing happened
But when I turned the ignition of it backfired
And a oily mixture splatted on back of my house.
Does anyone know what could be wrong
Thanks.

Take the spark plug out

Then turn the ignition on. if it sparks when the ignition is turned on, I think the black box is blown, likewise when turning the ignition off.

I have done this myself by mis-wiring the system before now.

Pic of mz electrics.

From which ocean did you pick that out of?

Nah I joke- but seriously- I had the same ignition that I blew- Did you try as I suggested?

Hi,thanks for all your help.
I did remove the generator cover and cleaned it out, it was a bit rusty, I think I need to strip the generator and get any corrosion of the parts.
I have some new brushes and the part the brushes fit into(sorry don't know the name)
I don't know were to connect a mutil tester to test things as I cannot find my Haynes manual!