['88 Shadow Dude]

I had this happen a lot on my 1988 vt1100. The bike would get hot and finally realized the fan wasn't turning on till after coolant was spewing out. Decided to do trial and error and bought a new temperature switch, which ended up solving the problem.

 

['88 Shadow Dude]

I may do that in the future. For now I solved the electrical issue with the radiator fan by installing a new grounding toggle switch which bypasses the temperature-sensitive switch that would connect the circuit through the ground (or negative) side.

I had ended up doing the same before replacing the switch. Found the switch on amazon for something around 8 bucks. Easy and quick switchover too, and it solved the problem.