A few questions about pistons and tuning?

[look no hands]

assuming the supersport is 29mm and longish stroked, you cant go too light on the piston, so 250-300 g range ? buttoning good if rear of piston loose in the bore. if tight, less advantage.
hth JB

Thanks for that Jon, just what I needed to know, the piston in my Airsporter RB2 and the Brocock Indy have nicely finished/machined and mirror polished rear skirt/saddle and fit pretty well in the cylinder, all I want to do is take the 'spit and polish' tune up a stage after the usual kit fitting and spring end polishing etc, I may have a go at transfer port sizing as I have access to a lathe now but that's something I'll have to pester you and others about at a later date, as soon as my seals arrive and my spare piston, I'll do a measure up and so what figures I have.

Many thanks for your advice yet again Jon

Pete