REED VALVE, 93-99 STD Short Sleeve YZ 400 : 1977-1978-1976-1979

YZ 400 : 1977-1978-1976-1979

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Stroke Length: 53

Give improved feel

REED VALVE, 93-99 STD Short Sleeve YZ 400 : 1977-1978-1976-1979Caracteristicas: New style breather is not dependent on the rotation of the crankshaft to make it open and close. Instead, reeds open when pressure in the crankcase becomes greater than pressure in the cam chest, and close when pressure in the cam chest is equal to or greater than pressure in the crankcase By opening and closing "on demand," the reed valves automatically compensate for lag time associated with accelerating the mass of air as it is