per Bill Gately at Bonneville Performance, the counterbalance shafts are a power looser and are not needed with a balanced crankshaft.
He was pretty clear that even with the balanced crank it would not be as smooth as the stock motor with the balancing system in place.
I do not recall a discussion on whether the balancing shafts would still fit or not. But I did not try either.
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
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