> Gle Cas Wrote:
> -------------------------------------------------------
> > Richard Eberline Wrote:
> > ARROW towards intake on the piston.
>
> Arrow on the piston should be pointing towards the exhaust, not the
> intake.
>
> And the carb size is relative to the intake size. If you have a 13 mm
> intake = go for the 13 mm carb. If your intake is 12 mm = stay with the
> 12 mm carb.
I previously wrote: "Arrow on the piston should be pointing towards the exhaust, not the intake."
This is the most common on Vespas to my knowledge, but I guess Olympia is different. Thank you Richard Eberline for the info.