does anyone have a good way to test the fan? I can't say that I have ever heard my fan come on!!!! Could I just put a battery to it to make sure it come on? If it comes on then check the temp switch?

 

Just take the wire plugged into the fan switch on your right radiator, then ground it on part of the frame or radiator when the ignition key is on. It should kick on (the fan switch is designed to ground it at a certain temp). Piece of cake, takes 30 seconds.

 

Plugged it in and it went on!!! Where abouts on the temp guage should it come on if it's working properly? Should I take the sensor out put it in hot water and see if it closes?????

 

OEM temp gauge comes on at 100*C I believe. If you can get a pot of water to that temp, you can check continuity between the switch body and plug at that temp. May want to check the manual to make sure it's 100*C.

But before you do that, more than likely it is not the switch as these things don't fail that often. More often it is issues with air bubbles in the cooling system (the coolant doesn't circulate well so the hot stuff stays in the thermostat/motor and the cooler stuff stays in the rads, thus the fan switch doesn't kick on). Have you changed coolant recently or noticed any leaks?

Or it could be a failed thermostat- if it fails closed, then water isn't circulating through the radiators. A quick way to check this is to take the radiator cap off when it's cold then turn the bike on. Once it reaches temp, you should start to see the coolant in your radiator "flow". If this is inconclusive or you don't see flow, test your thermostat. That one's easier to test. You suspend it in water with a thermometer and turn the heat on. Once the water reaches 80 or 85*C it should open. If it does not, then you need a new one! But if it's cooling decently while you're moving just the fan's not kicking on, this probably isn't the case.

 

I did have a leak last winter the bike leaked coolant out of it and I pressure tested last weekend and it held just fine for 15 min. My bike got really hot last year and I don't remember the fan coming on. Was going to ride here pretty soon weather finally starting to get a lil warmer and see what it does. At least I know the fan works.

 

I've never had an issue with the bike running hot. I've had the fan turn on maybe 3 times since I've owned it and only for less than a minute. Maybe because it's pretty much 75f and sunny all year, plus I can split lanes in traffic. My temp gauge usually sits around the 1/4 mark.

 

So far it looks my fan motor is dead. Just need to check the plug at the front of the radiator. But I need to work out how to get to it.

 

Turns out its a wiring fault in the loom. Power at the fuse but not the plug to the fan. Ran a bypass from the battery to the fan and it works. Will be running power properly to the front of the bike soon so will do a tidier job when I wire that in.