SilvoLite used to make .080 stock replacement pistons.An 1/8 over is max,.110 is safe according to Pat Smith.
I just had a 261 block bored .080 to clean out some rust pits in the cylinder bores.It has Ross pistons,9-1 compression.
I will know pretty soon if the cylinder walls are too thin........


70 Triumph 650 cc ECTA current record holder