This bike was only sold in the United States in 1984 and 1985.he two 1984 USA models were yellow and black (Kenny Roberts Special)The RZ350 had a variable exhaust port valve called the Yamaha Power Valve System (YPVS) that was controlled by a basic computer. The YPVS could adjust the height of the exhaust port and thus affect the exhaust port timing. This provided lower RPM torque while retaining high RPM power. this RZ 350 with only 11.000 original miles, in mint condition, 100% stock, start and run perfectly. everything work on this beautiful 2 stroke. the original paint is very shiny ,no scratches. Start, Shift and run like new. Original exhausts & mirror available.