It's designed for year around use.
I think the installation on my 99 Ninja 250 "might" be the
first on a Ninja 250. Will give feed back as I ride the Ninja
over the next 12 months.
Since the KLR650 had a needed "Doohicky" upgrade and I guess Watt-man did not want to call it a "Thing-a-ma-bob"
it ended up with the name of "Thermo-Bob" (I think) as another needed upgrade for the KLR650.
I did not take the Thermo-Bob apart for inspection before installation, but from information I previously reviewed before installation and temp graphs posted by dubojr1, it is a continious coolant circulation loop, with the thermostat open or closed.
I wanted to share the Thermo-Bob installation information, since winter is
just around the next curve!