piston throw weight would also affect torque /power figure's due to the fact that considering there is now more kinetic energy acting on the piston in the upwards motion, away from the crank rather then the force pushing down on the crank to make the torquing/ rotational motion to turn the wheel's.
so when looking at a dyno graph. and the point at which the torque begins to drop. i think this would be that particular motor's piston throw weight point. and using lighter weight pistons would shift this point higher up in the rev range.obviously holding the torque longer to make more power. considering the piston weight is now less.
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