I need to bore the cylinder on my SS180 and I want to know the recommended bore dimension for "Pistoni Gol" piston size 62.6 mm.
I currently have Pistoni Gol 62.4 mm. Measuring on the top of cylinder (undamaged by piston rings), it is bored to 62.55 mm. I guess someone before me has bored to Nominal (62.4) + 0.15 (recommended for PX).
As far as I know (did it before on other Vespas), It should be about 0.15 mm on top of piston dimension on the bottom (measured 62.3 mm) - 62.45 mm. Please correct me if I'm wrong.
Does anyone have clearance dimensions for SS180? Thanks.