The NS400R was by far the best put together, although it does sound like a swarm of angry wasps. Under the fairing there is a three cylinder engine, two pots point forward and one went straight up. The chassis detail blows the RG500 and RD500LC into the weeds. Things like that funky swing arm, and the Honda GP racer RS500 replica wheels, beautiful touches. The Honda NS400R still looks flipping gorgeous. Decent examples are making around ten grand, for that dollar it needs to be a genuine UK bike, with some decent paper history. Work your way back from that figure for scruffy bikes and unregistered Japanese imports.