when you install a lightened flywheel you lose the ablitly to store energy not lose torque i called fidenza and talked to a rep the way he put it take a 6 pound bowling ball and then a 18 pound bowling ball throw them from the same distance the out come at the end when the ball strikes somthing will be differant his example was a bowing ball and pins he said he get this question a lot we custumers can not spin or curp 2nd hope this helps