USA - In the USA the RZ came with catalytic converters for emissions requirements, and was the first motorcycle to do so. It was only sold in California in 1985, as the RZ350NC, and a second version was sold in late 1985 and 1986 as the RZ350NC2, both of which had an EVAP canister and an additional catalytic converter in the exhaust pipe header to meet California emission regulations. Sales of the RZ350 were discontinued in the US after 1986, as Yamaha decided the two-stroke would use too much of their United States Environmental Protection Agency fleet emissions quota, and limit sales of larger displacement bikes, which were more popular sellers.