With out a doubt that is what it is. When I got my trike the choke was not tied off and that happened to me three times. The first time it was at midnight going into Yellowstone and I was at 10,000 plus feet, when I started to get super cold so I pulled over (spooky to) to put on some warmer clothes. I got some heave stuff on and that pup wouldn't start to save my neck. Here I am by myself in a scary place with animals moving around and me with a non starting Trike. I had luckily added a by pass button to the neutral safty switch so I turned the Trike around started coasting down the hill with the bike in low and pushing on the starter like crazy. It started so I turned around and headed on over the pass to a Motel some 50 miles away. It did it again later so I looked under the tank on the right side, took a long screw driver and pushed the choke arm back down and that was it. As soon as I got home I took the tank off and tied the choke off and now I have no troubles with that problem.
Adrian
Adrian