205 vs Ross Pistons

The Ross piston is the shiny one!

Top view. Note the different size valve cut outs for the inlet and exhaust The Ross pistons are dished A close up of the top of the pistons The underneath of the pistons
The ring grooves are slightly differently spaced Another view of the ring spacings The oil drain hole arrangement differs Another view showing that the Ross piston is smaller than the stock piston
The Ross piston is slightly shorter than the stock piston. Note the oil ways in the Ross gudgeon pin area Another view showing the differences of the oiling arrangement for the gudgeon pin Note the cut out in each piston skirt for the oil squirter