The Yamaha DS7 motorcycle was made in 1972 for one year. It is a 250cc twin 2 stroke. The DS7 makes 30 hp @ 7,500 rpm. Top speed is 93 mph. 12v battery ignition. 5 speed. 1/4 mile in 14.8 seconds.
The DS7 is the initial forerunner of the Yamaha RD series of motorcycles started in 1973. The major difference between the 250 cc DS7 and 350 cc R5 of 1972 and the 1973 RD250 and RD350 was that the DS7 and R5 utilized piston-port induction, whereas the RDs were introduced with reed valve induction.
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