any common cars with a 66mm cylinder bore?

long story short, my latest sprockets project needs rings.

and I can't find any in stock any were. the other issue, Is I'm not sure this is the stock piston and would like to try them before buying.

Any normal everyday cars have a bore that is 66mm. or very close (66.25, 66.5)?

80 IT175

Way back when, Perfect Circle used to have a size listing by bore and ring land then subdivided by the ring profile (one piece oil, 3 piece oil, scraper, Dykes, etc) and I put together some really weird combos from that book.

Wiseco is probably the largest supplier of aftermarket pistons and rings for two strokes in the US and has a size listing on their web site at http://www.wiseco.com/Catalogs/DirtBike.aspx

Being a ringding, it's going to need the type of rings that are 'pinned' so they won't rotate around the piston.

a ringding?

This is what I have:

Oops, sorry. 'Ringding' is dirt bike community vernacular for a 2 stroke, based on the 'ringading' exhaust note. 'Thumper' refers to the 4 stroke exhaust sound.