Thanks for the tip and the weight. I'm just about to try and call up UEM to see if they have a weight for the KB 340 piston. I checked Mahle on Summit Racing but they are too expensive for me.
Piston weight is not a big deal. Neither is pin weight. 90 grams on piston won’t ever show up. Ever. Pin weight is the same. A heavy pin comparatively will not make or take one HP. Unless you are trying to match piston weights all this is just an exercise in futility.