The sensor is plugged up, I don't have a washer on the sensor though, If you look at this diagram it shows a washer (part number 21) that goes on the coolant temp sensor. I'd think that washer is only for it to not leak, Which it doesn't leak right now I've already watched around thermostat and sensor, no leaks anywhere on bike. And the gauge cluster does read the temperature, It's actually seems way more accurate, It use to jump 10+ degrees at one time sometimes, It would go from 115, 126, 130, 119, 123, 129, 121, etc, Now it just goes like, 120, 121, 122, 123, 124, so on. Until it got to high temps like 185, Than it jumps around all wild once again, Could go from 210 straight to 230 etc