Originally Posted by BarelyAWake
While the purpose is similar, the CNS doesn't have a choke and it doesn't restrict air to make the air/fuel mix richer - it has an enrichment circuit. When the "shifter lever" pictured is engaged (tightening the cable) it pulls open a secondary fuel supply & makes the mix richer w/o air restriction to aid cold starts.
A slightly more precise method of enrichment, if a little more complex.
I would suggest seeing how well/poorly it runs before you bother trying to mess with the settings BTW
enrichment..I'll buy that...although the instructions refer to it as a "Choke" I had a CNS in a box of parts I bought. Never looked at it...just got rid of it to the first buyer that came along.