WARNING: Cancer and Reproductive Harm - OKO High Torque Starter Motor for the GY6 is a great replacement to the stock. This starter motor is specifically designed for high torque making it ideal for big bores or stroker big bores. The overall is designed heavier duty and more reliable, so you no longer have to worry about your bike not starting. The starter motor is only recommended for big bore GY6.
Bolt Hole Spacing: 78mm
Shaft Length: 18mm
Shaft Diameter: 11.5mm
Diameter (near o-ring): 30mm
Number of Splines: 9