The Wiseco are fine provided you rebalance the crank, otherwise vibration is a concern. You also have to relieve the cylinder sleeves a little bit with the 82mm pistons or the opposing piston skirt will hit the sleeve at BDC.
I have 82mm lightweight pistons available that weigh only about 5-7g more than stock pistons. $325/set including rings/gaskets/pins/clips. I also have cylinders bored and ready to go, for $80/pr., all you have to do is provide a good core set of cylinders in exhange.
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