No servo, wasted weight and complication in the aircraft.

Just put a screw in the choke arm with a nut above and below the arm to retain the screw. Now the screw will stick straight up and become a handle to operate the choke.

You stick your finger into the cowl from the front intake vent, and push the screw to the side closing the choke. Flip it until it runs and quits, and then push the choke with your finger back to open, flip it 5 times and it should pop on the 4th and run on the 5th flip.

To kill the engine in the air or away from you, just pull throttle to idle and trim full back. If you are next to the plane you can do the same or just turn the ignition switch off. Works fine and no need for extras (kill switch or servo on choke).

Nice engine, enjoy!

-=>Raja.