Piaggio - Bravo engine spec. Question

Trent Van Gilst /

I would like to know what the spec cylinder wall to piston gap is. I'm boring out my engine and am trying to figure out how much to bore.

Thanks

Re: Piaggio - Bravo engine spec. Question

You might check Myrons Mopeds. There may be something there.

Re: Piaggio - Bravo engine spec. Question

I would just bore/hone it to the ring gap I want d to run.

Re: Piaggio - Bravo engine spec. Question

ru trying for more power or just trying to rebuild stock to run? if power, do searches and continue reading. if cylinder bad to be rebored and u have to pay for it, just buy a new cylinder/piston kit, cheeper.

Re: Piaggio - Bravo engine spec. Question

I'm pretty sure it's in the wiki under Vespa factory manual. In it is specs in three languages. At the very least the exact bore is stated. But it sounds like you are boring to a certain ring gap whereas it's my assumption that the ring gap is set after the correct piston diameter vs cylinder bore is established. Then the rings ends are filed to the correct gap. So perhaps I'm not reading your post correctly?

Re: Piaggio - Bravo engine spec. Question

Is this what you were looking for?

Screenshot_20191211-190801.png
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