According to Google... here are the specifications. Also I do have the Alltrax controller and PB-6 pot throttle available too...
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The Advanced DC (ADC) Motors X91-4001 is a 6.7-inch diameter series-wound DC motor commonly used in electric vehicle (EV) conversions.
Key Specifications & Details:
Manufacturer: Advanced DC Motors (ADC)
Model Number: X91-4001
Diameter: 6.7 inches
Length: 15.3 inches
Voltage Range: 72V - 144V
Type: Series DC Motor
Application: Ideal for long-range, good-performance electric vehicles up to 750kg, particularly at 120V.
The X91-4001 was part of the ADC motor lineup often paired with Alltrax controllers, which feature 18 kHz frequency and 0-5000 ohm throttle input.

Tim

DC lectric motor for EV conversion (Clinton near Cultus Bay)