KV8-M71X2-00X SPG.RETURN

For nozzle rod down buffer. YAMAHA spring, YAMAH nozzle lever spring

KV8-M7154-00X SPG.RETURN

FNC SPRING RETURN INDEX HEAD 

When the solenoid valve push nozzle rod drop down to a certain location. This action of the spring is to let the nozzle rod back to the original reference point.