Engine whine

[Anonymous]

After rebuilding my TS250/1 (new crank, clutch, primary gears, piston,etc.), starting from cold everything sounds fine. Then as I engage 1st gear, let the clutch out and pull away, there starts a loud whining noise – sounds a bit like primary gears (new ones fitted). Once the engine is hot, if it’s in neutral it sounds ‘loose’ – this rattle disappears completely if the clutch is pulled in – any ideas?
This is my first MZ so I’m not sure it this is just a feature or something to worry about!

Thanks for any help

[Stephen Wade]

hi martynn,i have had this prob before,it was the clutch that needed shimming,it’s not easy to measure the play,i just changed the shim for a thicker one that i already had,i think they are still available in several sizes,try the mz shop.regards sw. ps the primary drive gear does whine quite loud !

[Anonymous]

Hi Stephen,
Many thanks for the advice. I did try to measure the drive gear endfloat with a DTi, but as you say, it’s difficult to arrive at a definitive figure. I was surprised that it only needed the thinnest shim, so I’ll do as you say, and put the next thickest one in.
Thanks again
Martynn

[Richard Smith]

Hi Martynn,
Iread your post with interest,because I have the same issues with my ETZ.I have been following this post in the hope that someone would say,”ah yes,it’s this,this or this”Stephen Wades reply is helpful,so I thought I would pass on my theories. Over the two years I have owned this MZ,the clutch drum,friction and driven plates,the lifting mechanism,and the shim have all been replaced with new.It still rattles!I don’t think it’s the clutch at all,but one of the sliding gears.When I pull the clutch in the rattle persists for a couple of seconds untill the clutch plates separate.Its done this for two years and 8000 miles so I dont think it’s a problem.
I replaced my noisy primary gears with used ones that were not as worn,and they still whine,but less so. Most of the parts available now for MZs are aftermarket items and I have found the quality sometimes rather dubious.
Terry Taylor.

[Anonymous]

Hi Terry,
Your reply is most helpful. I’ve rebuilt the engine, replacing the crank, clutch housing, plates, etc (amongst others). I was pretty careful about measuring the end float on the sliding gear. So I was surprised when I heard it rattle and whine. Initially I thought the whine was from the primary gears, so I bought a new set from a German website. When they arrived, I was a little alarmed at the poor quality of the machining/casting, but fitted them anyway – just as noisy as before. So, I bought a more expensive set from the MZ shop. These were much better quality, but after fitting them, the whine was unchanged.
After reading your message, I think I might just ignore the noises, and keep on riding it.
Cheers!
Martynn

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