V-max is a standard, and was never marketed to cruiser buyers. That's they key- put the tight power plant in the right bike for the right people. Suzuki built the VX800, a standard with a absolutely wonderful v-twin engine. It was a complete failure, and dealers could hardly give them away. But the next year the same motor went into the VS800, a small cruiser, which is still a good seller almost 20 years later. Same motor, different buyers, different set of expectations.
Hell, even Harley made this mistake, sinking millions of dollars into a line of modular water-cooled, overhead-cam engines in the late 1970s, which were to be sold on 400 and 500cc twins, 800 and 1000cc v-fours, and 1200 and 1500 cc v-six sizes. This, in turn, required the design of a whole new line of bikes, rather ugly creatures to say the least. But they did have under seat radiators, and scoops next to the fuel tank to feed air to them- giving the bikes a somewhat 'v-max' like look years before the v-max. Anyways, after more than 5 years, a dozen prototype bikes, and over 100,000 miles of testing, the marketing people finally chimed in that no one would buy the new bikes: those looking for a high-tech bike did not want a Harley, and those wanting a Harley expected a big air-cooled V-twin. By all reports the new motors were pretty decent, and a 1500cc, overhead cam, water cooled motor pushing out 135 HP would be at home in a GoldWing today, let alone in 1980. But it was not the right motor to put into bikes aimed at their target market, so the Evolution motor and Softail frame were chosen for production. The rest is history: Harley has an 80% market share in the cruiser segment with their big v-twins, and non-v-twin motored cruisers are a novelty. Harley did eventually develop the Revolution water-cooled twin for the V-Rod, but this non-traditional bike continues to be Harley's poorest seller.