Improved power supplies for AC Motors like the Linn Lingo and VPI SDS will typically provide start up voltage (in North America) around 110-115 volts necessary to start the motor and achieve rotation of the platter.
Once that rotation is achieved they then reduce voltage provided to the motor as reducing the voltage also reduces noise and vibration in the motor itself, resulting in improved sound quality.
I run my Gyrodec with original AC Papst motor manufactured in 1981 using a variac and dial the voltage down following startup to around 53-55 volts, which is just enough to keep the platter spinning.
If you place your hand on the motor housing while doing this you can literally feel the vibration from the motor dropping away as you reduce the voltage and the benefits are audible.
There is nothing wrong with your Valhalla or motor. That is not to say that an improved motor might result in better sound quality; that is a possibility. But it is not "necessary" to replace your motor because of the specs mentioned.
Once that rotation is achieved they then reduce voltage provided to the motor as reducing the voltage also reduces noise and vibration in the motor itself, resulting in improved sound quality.
I run my Gyrodec with original AC Papst motor manufactured in 1981 using a variac and dial the voltage down following startup to around 53-55 volts, which is just enough to keep the platter spinning.
If you place your hand on the motor housing while doing this you can literally feel the vibration from the motor dropping away as you reduce the voltage and the benefits are audible.
There is nothing wrong with your Valhalla or motor. That is not to say that an improved motor might result in better sound quality; that is a possibility. But it is not "necessary" to replace your motor because of the specs mentioned.