Vespa Ciao vibration issue

Chris Carleton /

Some major vibration that is rpm related doesn't seem to be crank related but I don't know maybe? Not a knock. Ideas?

Re: Vespa Ciao vibration issue

Dirty30 Dillon /

Ciao's vibe for every reason. I've found that a big culprit is trans input shaft vibes if your belt's too tight, esp. at hi speed WOT

Re: Vespa Ciao vibration issue

Ľ̷̝̽͒i̶̛̼͑͠ȁ̸̧̛̽m̵̻̟̯̀̅ ̷͎̙̽̊F̶̲̺͑̓ F /

On my bike, I just took the driveline off and put it back on. I have no idea where it came from, but some things tend to loosen themselves or slip themselves, but it fixed itself

Re: Vespa Ciao vibration issue

if your belt is pliable, then take a look at your front clutch bell, where the pulley is machined, I've seen one that was so badly casted, 1/4" off and was very unbalanced.

Re: Vespa Ciao vibration issue

Chris Carleton /

Wasn't a belt tension issue.Kinda puzzled can a bent crankshaft cause these vibes doesn't look bent though?

Re: Vespa Ciao vibration issue

Anticipato crank?

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