Not sure if there is an over temp shut down or not. Sailor would know.
Not sure if the pump is running when it shuts down. If it does have a shutdown mode it probably isn't running. Maybe disconnecting the battery would've been an easier reset if that was the culprit. Had no idea these bikes were engineered this way. I should've purchased a gs911 the day I bought it
On all K1200 brick-engine (K1200RS/GT and K1200LT), the BOSCH Motronic ECU has 2 trigger temp that are hard coded:
1) The radiator fans starting point (105 C / 221 F or roughly 187 Ohms resistance)
On a 1999-2004 USA model like yours (1st generation dash), with all systems are working normally, when the rad-fans start, the needle of coolant gauge on dash should be about HALF-WAY between middle-white line and red-zone
2) The Engine Temp Warning light on dash goes ON (115 C / 239 F or roughly 143 Ohms resistance)
If the fans are doing their job and the coolant system is full and working properly (clean rads), this warning light should NOT appear while engine is running. When you turn ignition ON, before starting engine, you can see if the Engine Temp Warning light on dash is working.
Although I normally test every assumption, I have NEVER tried to simulate a very hot engine by cheating the resistance coming from the engine coolant sensor. HOWEVER, based on every owners manual published for all K1200 "brick-engine", I would assume that there no auto shutdown built-in. Every version of these manual says the same thing:
---- Quoting from Manual ------
If the coolant temperature warning light comes on, stop the engine and allow it to cool down. Check coolant level in the expansion tank. If the expansion tank is full, but
the warning light remains on, or if coolant consumption is excessive, consult a specialist workshop, preferably an authorised BMW motorcycle dealer.
----- End of Quote -----