You would be better off getting rid of the cable and replacing it with just the knob as the cable can sometimes result in the choke being partly left on. That's what I did on mine and it seems to run more consistently.
Try this for only $10 GBP
https://www.amazon.co.uk/Choke-Keihi.../dp/B01MYMQHTD
Or only $3 GBP
http://www.racing-planet.co.uk/manua...l#.Wf4rs2995EY