Overheating i think

[calvarez]

Oh, also, some bikes have a heat-up bypass circuit so a thermostat that's partially closed would encourage the water to bypass the radiator. Don't know if the RX3 does or not.

[pyoungbl]

Originally Posted by calvarez

Oh, also, some bikes have a heat-up bypass circuit so a thermostat that's partially closed would encourage the water to bypass the radiator. Don't know if the RX3 does or not.

Nope, that's something I tried to engineer but it quickly fell into the 'too hard' category due to the placement of water pump and exhaust. I was OK with the pump mod but did not want to engineer an all new exhaust system.

If the left rad is cool but the right one is hot that would make me think that the problem is lack of circulation (bad pump) and that the right rad is getting warm simply due to warm coolant rising from the non working pump. Normal flow pushes coolant from the pump, through the engine, through the thermostat housing, and over to the left radiator...then to the right rad and back to the pump. There is a tiny hole in the thermostat so there is always a bit of flow but as I recall it's only about 1/32".