Fitting Pistons

With pin removed, measure for taper at pin centerline and bottom of skirt. Measure for size 3/4" below pin centerline on skirt. Allowable taper is 0-.002" (0-.05 mm). Measure cylinder bore with inside micrometer. Maximum allowable taper is .001" (.025 mm). Pistons are available in standard, standard high limit, .010" (.25 mm) and .030" (.76 mm) oversize.