I'm currently rebuilding my bottom end on my 2wd saph, I bought the bottoms end already bored .5 over bored and honed, I have measured the Pistons in the bore and its is .38mm which I beleive is a good tolerance? But when I put the Piston rings in, push them down the bore slightly with the piston and then measure the gap it is between 0.80mm - 0.97mm, the workshop manual says it should be 0.4 - 0.6mm, the rings are the correct 0.5 oversize so what is goin on??

Regards, Kieren