Remanufactured pulleys in different sizes . Garrard had several different sized pulleys throughout the production run. We can only assume this was to match different batches of motors.
The only way other than using a separate power supply to alter the speed is to change the size of the pulley.
Most 301’s we come across run with the magnet on MAX – This causes the motor to tow considerably and vibrate which contributes to low-frequency noise in the loudspeaker. Ideally, the fine speed needs to be in the centre or to MAX +
If your machine is running fast then check the size of your pulley and buy the pulley smaller in size
Red speed is the smallest
Green 33 – 6.63 mm 45 – 9.03 mm 78- 15.84 mm
This sale is for the green pulley above size