I though I would share with everyone what I did to resolve my problem with my fan not working. Fist I tested the fan. I hooked 12v to the fan and it worked fine. That left me to believe it was one of the 2 sensors that are $25 each but which one? Well instead of buying one and taking a 50/50 chance or having it end up being something else after I spend $50 I used a wire splice and hooked the main power from the fan to my low beam lights. Now when I turn the lights on low beam the fan comes on and when the light is off or on high beam the fan is off. Now If I even think the motor might be getting warm I just flick the lights on and I have instant cool. [img]i/expressions/face-icon-small-smile.gif[/img] Works great. I hope this helps someone.

 

or instead of using your lights for the switch, go and buy a cheap single pole switch, at home depot, or something like that, they are only like $1, and mount it with house clamps beside your light switch, or even mount it anywhere you want... then it works completely by itself...

BUT what you could do to check to see if which one of the sensors is gone, is, get a multi-meter, measure resistance between the leads of each sensor, you should have some resistance like 50 Ohms for example.... when they get hot, once they reach there set point, they go to 0 Ohms, or short, and that tells the fans to come on.... you know it is a bad sensor if it is OPEN, or Never Shorts.

 

Yeah I had though about that but decided it doesnt hurt anthing to run with the lights and I dont have to add anther switch somewhere. The light switch is easy access and looks 100% stock.

 

sorry i edited after original post...

 

I thought about doing that but then you have to let it get really hot and how do you know it's hot enough unless the temp light comes on and I think that's a little to hot. I had my light come on one time and that's when I found out my fan didn't work. I had to sit and let it cool for a while because I was not in an area where I could get going to cool off. This way I know 100% it will work and I can hear it. From what I hear it is very rare that the fan comes on anyways so I only use it if I'm doing a lot of slow trail blazing or hill climbing and it's hot out.

 

well what you can do to test them are, take them out, put a pot of water on the stove and heat up the water... then monitor your sensor, and the manufacture "Yamaha" should tell you when it is supposed to trip over to a short.... usually CAR thermoswitches trip over at around 175 - 195 degrees F...... I am sure these are probably around the same BUT I AM NOT SURE.... use a Thermometer and measure temp of water, and then use your multi meter for resistance.... this is the way to check them, without damaging the bike.

 

would it hurt anything other than the fan motor to run the fan constantly? and how quickly would ur fan motor burn out if it was on when ever the key was on or that switch u guys are talking about?