you guys are missing hte point.
i'd done plenty of top covers. what i NEEDED was the measurments of the piston to see if this guy has the old piston or needs to BUY a new one.
I don't have a NEW one in my hand to set down to his to compair too..
thus the request for the measurement, so when i pop out the piston, i can MEASURE IT.
if you don't know it.. fine.. just say so.