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Originally Posted by inspiron  The fan temperature is not normally regulated by the ECU, is it? That is an independent temperature sensor, I believe.
I just looked at the wiring diagram for my bike, and the fan is connected to a temperature sensor and a fuse, but nothing connects to the ECU module. |
The temp sensor should be connected to a computer of some sort, in order to convert the voltage into binary code, in order for it to be displayed digitally on the gauge cluster. The computer can also use this information to turn on the fan at a certain temperature (mine turns on at 219 degrees F) Not all bikes display the temperature digitally, so you may be correct that on your bike the fan isn't regulated by the ECU, but on some bikes (like mine, or possibly even blackr6's bike) it may very well be computer operated.
As far as the original question about whether or not they're worth it, everyone seems to upgrade to a Power Commander on their sportbikes, so there has to be something good about them. I myself probably won't get one, as I'm learning to be a mechanic so I've learned that it's really not worth it to add a $350.00 part to a product (motorcycle/car) that a company has spent millions or even billions of dollars perfecting.