Join Date: Nov 2011
Location: Parker, Co, USA
Re: Did anyone have a faulty thermostat on K12LT?
Keep in mind the Radiator cap is 9 years old, is relatively cheap and relatively easy to replace. My bike had overheating issues at a stop...you could watch the needle creep up til you felt uncomfortable with how high it was getting. If you held the engine to 2000 rpm or so, the temp would fall, and if you held your hand over the radiator exhausts, you'd feel the air getting SUBSTANTIALLY hotter than when it was sitting at idle.
Water based cooling system MUST create and maintain higher than atmospheric pressure to operate, if that cap isn't allowing the system to pressurize, your coolant will be losing a LOT of efficiency.
In my case (see attached) the rubber gasket looks....compromised.
Raplacing the Cap dramatically improved the performance of my cooling system. I cannot say it's fixed it 100%, because I didn't really notice the behavior until the system was very broken.
The worst thing that can happen is: Hey, you have a new radiator cap installed...that's not a bad thing. The best thing that can happen is you keep from having to SERIOUSLY disassemble your bike.
05 LT - Blue
03 VTX 1300s - fun while it lasted, sucked in the cold.