The Cycle Analyst is a proven instrument designed for electric bikes. However, the high current model (CA-HC) is well-suited for electric motorcycles and has become very popular in conversions.
The Cycle Analyst mounts on the handlebars, unless you come up with a better way to integrate it onto your motorcycle. A wide range of voltages can be used to power the CA.
It provides many parameters such as speed, distance, voltage, current, and energy consumption. A shunt resistor must be purchased to use the high current model.
Another device called the Analogger can be connected to the CA to record data onto a micro-SD card for analysis after the ride.