Honda quotes the 1967 RA300 as producing "over 420 PS" (414 bhp) at 11,500rpm. The vehicle weight excess over the 500 kg minimum had been approximately halved, with Honda quoting a weight of 590 kg.
Honda states that the 1967 RA300 produced more than 420 PS (414 bhp) at 11,500 rpm. The vehicle's excess weight above the 500 kg minimum had been reduced to around half of its original amount, with Honda reporting a weight of 590 kg.