Found this thread since I have the same black HEQ5 mount with standard motors.
I purchased an AstroEQ from Tom last feb but have only just bought the above mount second hand. Decided to remove the motors to view and low and behold they have stickers on them with the specs as follows;
RA Motor: SYNTA DW1323008
Model: 42BYJ07
Step Angle: 3.75º / 7.5º
Voltage: 12VDC (6 pin connector) wires are red, brown, yellow, blue, black, white.
Ratio: 1:131.876
DEC Motor: SYNTA DW1323009
Model: 42BYJ08
Step Angle: 3.75º / 7.5º
Voltage: 12VDC (4 pin connector) wires are red, brown, yellow, blue.
Ratio: 1:131.876
Is that any help?
Regards,
Neil.