Puffs, Well, at least you now have a clear idea of the cause. The piston on my MZ150 has very sunken pins which makes it tricky to keep the rings located correctly when lowering the barrel. However I assumed that once inside the cylinder they would be adequate to stop the rings turning. So far, so good, but you have given me something else to worry about. As you have said previously, if the worst happens it will not be as expensive a fix as for you!
I believe its the original MZ piston.
MZ/MuZ Riders
A community for owners and riders or MZ Motorcycles, Scooters, and ATVs.
New TS250 Owner
Moderators: DAVID THOMPSON, 125SMash, phlat65
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Re: New TS250 Owner
by dave47 » Wed Apr 13, 2022 6:23 am
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Re: New TS250 Owner
by Puffs » Wed Apr 13, 2022 6:31 am
For completeness the pic of the damage due to the ring failure:
I removed it earlier, but as I kept on posting about it...
- Damage due to ring failure.jpg (19.45 KiB) Viewed 170 times
I removed it earlier, but as I kept on posting about it...
Last edited by Puffs on Mon Jan 06, 2025 10:55 am, edited 3 times in total.
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Puffs - Moderator
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Re: New TS250 Owner
by Puffs » Wed May 18, 2022 3:13 am
The barrel has (finally) come back from the plating, and this is what it looks like now:
No, that's not a scratch, just some marking from measuring.
And it runs!
- Regenerated bore.jpg (19.15 KiB) Viewed 170 times
- Repaired section.jpg (22.3 KiB) Viewed 170 times
No, that's not a scratch, just some marking from measuring.
And it runs!
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Puffs - Moderator
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- Location: Ardennes, Belgium.
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