tie two double counterweighted 7m cranks to a standard bar, and i we'll see how many reps you can get out of it .... heavy heavy fuckers they are
single counterweight 7m cranks arent 'that' much lighter either.
what was it we figured out with the cranks weight and tourque curve? heavier somehow shifted the curve to the left?
theres not really much scope for removing weight on the 7m flywheel as it is anyway. and have you weighed your pressure plate lately, theyre not light. makes spending $$ on a lighter flywheel look kinda silly. (not that i'd do it anyway...)
and GT - pistons and small ends count as reciprocating weight, not rotating...