I have bought an MC21, and have the same question about the power-valves.
Should the servo motor turn while I switch the ignition on? Like it does on my RD350 YPVS or not? Cause I started to suspect that the servo motor is burned ( or somehting else) how can I check if the power valve system ( servo motor, ECU etc) work fine?
When I turn on the ignition nothing happens, checked the wires etc...looks like servo motor doesnt have its own fuse like on the RD3500.
Thanks!