Why bother with choke actuator/cables at all??
Another way is to have a pull wire with loop to actuate the enricher on just one carb, the left usually. Only one carb so rigged is sufficient, and no return spring is needed if the wire is chosen carefully and installed with a little stiction. I haven't tried it myself, but others swear by it. Here's a pic of one installed an an R100 that the owner is currently riding around the world. He said it has never failed to start, and saves complexity on his machine, a purpose built sidecar made for all conditions. This enables him to also run a spare throttle cable running where the choke cable would, which can be seen in the background ready for instant changeover.

Bill.................;-)