Double check my engine builder please 340 stroke

The ICON 20cc dish piston is 10 grams heavier than the 5cc flat top. Shouldn't have any issues with balancing it. I would go the dished piston. Trying to think outside the box is fine if you really need to and you have the time/money/inclination to, but this isn't that type of effort. If the dish pulls out to much scr go with thinner gasket a .027 cometic for example. Carb is small, I run 800 thunder series AVS