Broken piston pin circlip?

[Dea_944tTopic starterBerichten: 87]

The engine started running a bit poor so I removed the cylinder….

The circlip broke, is this a common problem? never happend on my Ciao engines before

Is this type of circlip better http://www.jmpbparts.com/vespa-ciao-si/engine-parts/pistons/pistonpenclip-10mm-per-stuk.html

/Dea

[zevenenergieDonateurBerichten: 4167]

It is not a common problem.

But where is the rest of the circlip?

The “running a bit poor” can be the result of a damaged inlet.

at by the look of it your gasget has been leaking.

And yes it is a good clip.

[Dea_944tTopic starterBerichten: 87]

Hard to say, but it dropped out when I removed the cylinder.
The inlet and the crank are both ok.

The “scratch” is 1 mm deep so I had exhaust gas recirculation which explains the poor running

[Dr GonzoDonateurBerichten: 175]

Last week I’ve had the same problem with the 43mm Olympia kit, same as topic starter; it starts, but no power…
After I found out that it must be a broken or lose circlip I drove home while cursing and full of anger..Lol
Them I burned my hand, because I did’t had the patience to wait to get that rotten cylinder off the bike…I was planning an overhaul anyway, but a shame that I killed the 43mm

Hey Steve, English 😉

Hey Mod..Zo goed?

[niek1992BijdragerBerichten: 1882]

A lot of users here on the forum don’t use those clips you used.

They had the same thing happen as you. Currently on mobile so i can’t give you a few links to other topics where the same thing is displayed.

Basically you should avoid those you used. They lose their stiffness quite fast, and work theirselfs out of the piston and into your cylinder.

[Dea_944tTopic starterBerichten: 87]

Thanks, ordered the other type of clips for my Speedengine build.

/Dea

[Gebruiker]

<i class="fa fa-comments-o" aria-hidden="true" style="font-size: 20px;"></i>