on my nsr 250 the powervalve moves when ignition is turned on everytime, but on my nsr 125 it only moves sometimes when ignition is turned on so i'm not sure how it operates on your bike.

but the powervalve servo should cycle between 2-3 krpm check this while the bike is running and should start opening at around 7krpm.

if it does not move then either your power valve is stuck or the servo needs to be replaced or the cables may be damaged.

i suspect that the powervalve is stuck in the open position.

i am not sure if this would affect your bike starting