This is a drive sprocket for a chain driven mechanism with 42 teeth, and a 420 pitch. Other teeth amount/pitch can be made upon request.
This sprocket is designed to be used on a Formula SAE racecar. The engine used is from a 2014 Kawasaki Ninja 650 which produces about 70hp which this sprocket was designed to withstand. It is however designed to be bolted to a spool assembly not the original motorcycle's factory hub.