High performance sprocket made specifically to fit the tapered shaft QS Motor 138 4000W 90H Motor. Sprocket comes complete with 5mm key bar. This sprocket works well with 520 standard and O-ring chains.
This sprocket fits the tapered shaft version of the QS 138 90H motor.
Tapered bore dimensions: 21.5mm diameter to 24.5mm diameter
Keybar width: 5mm