After looking at the AC parts diagram for the CV carb and choke system, I think I've come up with a solution for the hot start, high rev issues. As you know, the choke will engage and apparently remain engaged for a specified period of time whether engine is cold or warm. In oder to avoid the warm start problems with the choke, I plan to put an in-line switch in the circuit for the wire to the choke. Thus disabling the choke when the engine is warm. It looks like the wires connect with flat connectors which will make it easy to do. I'll need to put several inches of lead on either side of the switch in order to locate and secure the switch where I want it and have enough wire to get to the choke connections. Tomorrow I'll track down a weather proof switch and look for a good place on the ATV to put it. When I'm done and tested the set up, I'll post results.