my mostly stock 05 speedmaster got 43-44 mpg consistantly. the current motor configuration gets about 39-40 mpg. And I always have a heavy hand.
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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