With a top speed over 150 mph, Honda’s six easily outpaced Yamaha’s two-stroke twins, but reliability was a problem. It handled poorly, too. The RC165 won its second race, the Japanese GP at Honda’s own Suzuka circuit, but by then Yamaha had already locked up the championship. Real success wouldn’t come until 1966, when Mike Hailwood returned to Honda (after a four-year stint at MV) and tamed the six’s unruly handling. After his first ride on the RC165, Hailwood asked mechanics to remove the Honda-made rear shocks so he could inspect them. Once in his hands, he reportedly threw the shocks into a nearby pond and demanded they be replaced with Girlings! Hailwood also ordered the frame totally redesigned with stiffer tubing and the wheelbase lengthened 3.5 inches. Additional cooling came via an oil-cooler, extra finning and head cutouts.