I think my thermostat on my "94" K1100LT is not working. Temp gauge raises and then fluid squirts out the vent hole on the reservoir cap. I took out the thermostat, put it into 185 deg. water and it did not open until the temp reached 200. So I'm thinking it could be a bad thermostat. Someone mentioned that it could be the cap. ????? Fluid is getting back into the reservoir so how could the cap be bad???? Does anyone know if a generic (non BMW) would work and which one? Taking a trip to New England in 2 weeks.