Das MZ Forum für MZ Fahrer

Hello dear friends. A special call for help from the north station of MZ lovers, her in Denmark. I a link to a video from the cylinder area where it can be heard what I believe must be piston rings. This motor has always had that increased The strange thing is that this motor always have had this high clattering from the cylinder, but now the motor is fully refurbished with crankshaft, bearings and cylinder "honing" and piston. But the sound is exactly the same as always. The shop in Germany who made restoration suggested that it was the carburettor, I changed that to a new MZA carburettor. Sound is still there the same. The sound seems in direction from the cylinder area when I listen. I could buy another cylinder, no problem, but I would like to hear some from some of you. The mechanic shop where it got made has no idea of what it is. When the engine is cold there is no noise at all, but after 1-2 km it sounds like in the audio file Please listen to the audio file, any help will be much appreciated
video here : https://www.flickr.com/photos/136481338 ... 775213347/

****************** in schlechtem Deutsch *********************

Hallo liebe Freunde. Ein besonderer Hilferuf von der Nordstation der MZ-Liebhaber, hir in Dänemark. Ich lege ein Video aus dem Zylinderbereich bei, in dem zu hören ist, was meiner Meinung nach Kolbenringe sein müssen. . Das Seltsame ist, dass dieser Motor immer so stark vom Zylinder klapperte, aber jetzt ist der Motor komplett mit Kurbelwelle, Lagern und Zylinderhonen und Kolben überholt. Aber der Sound ist genauso wie immer. Das Geschäft in Deutschland, das die Restaurierung durchgeführt hat, schlug vor, dass es sich um den Vergaser handelt. Ich habe dafür einen neuen MZA-Vergaser montiert. Sound ist immer noch da. Wenn ich zuhöre, scheint der Ton aus dem Zylinderbereich zu kommen. Ich könnte einen anderen Zylinder kaufen, kein Problem, aber ich würde gerne einige von einigen von Ihnen hören. Die Mechanikerwerkstatt, in der es hergestellt wurde, hat keine Ahnung, was es ist. Wenn der Motor kalt ist, gibt es überhaupt keine Geräusche, aber nach 1-2 km klingt es wie in einer Audiodatei Bitte hören Sie sich das video , jede Hilfe wird sehr geschätzt. Video here: https://www.flickr.com/photos/136481338 ... 775213347/

There's only an picture, no Sound Please upload it to Youtube or make a attachment to the post via "Datei hinzufügen"

Greetz

Mutschy

_________________

das video funktioniert

Hello Mutschy
The video works , I just checked it on another computer, but its a bit slow loading and the showing the play arrow triangle, then it's playable. Thanks anyway

****
Hallo Mutschy
Das Video funktioniert, ich habe es gerade auf einem anderen Computer überprüft, aber es wird etwas langsam geladen und das Wiedergabepfeil-Dreieck wird angezeigt, dann kann es abgespielt werden. Danke trotzdem

-- Hinzugefügt: 6/11/2020, 18:05 --

leider kannst du hier weder mp3 noch mp4 dateien hochladen, vielleicht kleine mp4 ..?

-- Hinzugefügt: 6/11/2020, 18:14 --

Ok here goes. Link to you tube for
https://youtu.be/28JbV6CypRU

Hi,
I don't think the ticking comes from the pistonrings, it sounds more like one of the conrod bearings, or the piston deck is hitting the head.
Cheers,
Hans

Hi Hans
But the camshaft is brand new with new type bearings, and the motor have allways had this sound befor and after the make over. When cold no sound, but after 1-2 km Thanks

When you increase the rpm, the bad noise go's away.
I think it might be the primary drive.

Which parts exactly did you change?

Hallo der maaß

I asked for a super de luxe renovation of the motor. Here is the list from the workshop

There's a sound which means that anything is shaking/rattling. Remove the carburator cover and try again. It might not come directly from the cylinder. On my TS the key rattles in the ignition lock while it's in the idle. It sounds horrible. But there's no problem since I know where the sound is coming from MZ is made of steel without plastics. And metal sounds

Greetz

Mutschy

(sorry for my bad english )

_________________

you have a very good english Mutschy But no it's not just the the cover or any loose item, I know

It sounds that the slider of the carburetor needs an inspection. One reasons for this assumption beside the noise is that the noise softens when you speed up the engine.

Dissassemble the air cleaner, start the engine and push a finger against the slider of the carburator. If you do not hear the noise yet then the housing of the carburetor needs to be repaired or replaced...

I'll tell a story. I bought an ES250 / 2. The cylinder head of the TS250 / 1 with the damping rubbers was installed. The engine ran absolutely smoothly. I changed the head to the old model of the TS250 (same appearance as the ES250 / 2, only with centering collar).

Pinch edge everything was correct. When I started her, I immediately thought it was something broken. Certain sounds are similar to what you see in your video. However, my engine is not overhauled, I will do that for the next few weeks. The engine is not defective either, but drives wonderfully.

For me, this was an important finding with regard to the noise behavior of the ES250 / 2. The fan head definitely has a different noise behavior and brings out things that you have not heard before with the other head.

At the Zylinder, I can only advise you to measure everything. If the running clearance, piston taper and ring contact clearance are okay, things will not get any better with a new cylinder.

Best regards Michael

Edit: Oh, I just saw it was a little longer. Did you find the mistake?

Hello Michael

Thank you so much for your interesst ! I think that you mean that the cylinder ribbons size has a lot to do with the noise and resonans of the motor. I know that for sure. I have also a "mark 1" ES with the narrow cylinder ribbons. When you pinch its cylinder ribbons with the nail of your finger there is almost no sound, but a little dead resonance. But when I did that with the old cylinder with the big ribbons, it responded like a music harp. Now I have a new cylinder on with rubber dampings and a cylinder head in the version that is only seen on Danish imported MZ ES150's, it has rubber blocks in the head, see pictures. More people than you told me to measure here and there, but I simply don't have the skills or equipment to make any conclusions out of measure things like that, I must now conclude that the old cylinder had some kind of fault because now with the new cylinder the sound is MUCH better. Only more common pistonring sound is to be heard. Important is to be said is also that I now again have an original piston mounted instead of the Polish one that was mounted during the restauration. One skilled mechanic said that the Polish ones tend to rattle more.
Cheers and best regards Peter

Hallo,
ich würde auch auf Vergaserschieber tippen.
Das kannst du feststellen, indem du im Standgas den Gummischlauch zum Lufi abmachst und Mal am Schieber tastest.

Hallo Utche. Ja, ich kenne dieses Phänomen. Und ich habe einmal einen weiteren Dämpfer eingebaut. Er klappert nur ein wenig, aber ich werde ihn auch entfernen lassen