But each of the 4 cylinders/pistons are oval in shape. You can think of it as a V-8 with 4 valves per cylinder, but with adjacent piston pairs joined together with the space between them filled in, creating the oval shape.MaxDriver said:8 valves/cylinder, that's an impressive valvetrain.
the FIM killed it. they banned the use of oval pistons in four stroke engines. abck when the NR (not-round) was being developed gp bikes were two-strokes. honda never liked two-strokes and was always looking for a way to make four strokes competitive so they could stop building and racing the two strokes. they raced a early version in 1985 and finished 10th in one race and smashed the bike to bits in another race when it leaked oil all over the rear wheel. the other manufacturers lobbied to get the thing banned. they realized the potential it had and with honda having the patent no one else would have a chance. the FIM allowed four strokes to race in GP but they had to be "conventional" round pistons. oval pistons were not allowed in WSBK either. without a class the bike could be raced it became a tech showcase for honda.Drifter said:Yeah, and it was supposed to be a world-beater and lasted for what, a year? I never heard what killed the thing. Anybody?