It is a carburetor where the engine coolant is routed through the choke system of the carburetor. When the coolant is cold the choke will close. As the engine coolant heats up it opens the choke.
Manual choke
no
A common cause for an automatic choke to stick in a 318 Dodge truck is a dirty carburetor. A spray can be used to clean the carburetor to stop the choke from sticking.
Choke Cleaner
The choke control should have a cable attached to it that attaches to the choke on the carburetor at the other end. If you have no movement at the carburetor when you move the choke lever, look for the cable to be disconnected at either the choke lever or the carburetor.
An automatic choke is connected to the carburetor on small engines. To get a new automatic choke, a new carburetor will need to be purchased. It is easier to install a manual choke and less costly. Kits for this are sold at most automotive repair stores.
I assume your question was "do you ride an Xr100 with the choke on?". In response to that the answer is no. If you are having to run it with the choke on, that is an indication of clogged jets in the carburetor which will require removing the carburetor, disassembling, cleaning, reassembling and reinstalling on the bike.
grab it around the throat (carburetor) and choke it until it starts.
The carburetor has an electric choke that is possibly shorted.
The electric choke wire connects to the electric choke assembly on the carburetor. It's a round, black plastic assembly that is on the side of a STOCK carburetor. There SHOULD be a connection on the "HOT" side of the coil that lets you connect the choke wire.
choke, throttle, jet
Older vehicles with a carburetor have a choke to aid in cold starts. The choke would be part of the carburetor. If it was to be stuck on the engine would flood and not start. Newer vehicles (mid 80's and up) are fuel injected and do not use the "choke" as such. It is done electronicly.