2009 Yamaha Road Star, NO CARBS HERE - FUEL-INJECTED KNOCKOUT The Road Star is one of the biggest, baddest air-cooled V-twins in the business. It looks good, due mostly to the classic appeal of that hardtail-looking steel frame and all the classic-looking hardware that goes with it. When it comes to power that 102-cubic-inch overhead-valve air-cooled V-twin assures the horses are never in short supply.