Hi Quincy,
The Gyro SE is a beautiful little table and nicely designed. I do not know what kind of motor it has but I suspect it is an AC syncro motor. If there is a problem with the belt drive the speed will become irregular and if bad it will slow down. Some AC motors are driven by an oscillator which if malfunctioning might cause the speed to increase. Speeding up is unusual. Does the motor have a speed adjustment? Look at the manual online. If it does not then the motor would need to be sent back to Michell via it's US importer fidelityimports.com. I suggest you get in touch with them