Theoretically it can "work". This particular mod can be done by anyone with half a brain, a wiring diagram, and a Radioshack resistor. You use the resistor to bypass the intake air temperature sensor to fool the ecu into thinking the ambient air cooler than it actually is, and that messes with the fuel mix and the ignition timing on a injection system that is capable of modifying fueling parameters on the fly (most modern cars). It's a cheesy backyard tuner method, and it's been exploited for money making purposes by packaging a 10 cent resistor with some wiring and connectors in a box to sell for ridiculous markup.
This is pretty much worthless on most bikes, most of the time you will just end up with the bike leaving the automatic choke partly on so you get a slightly richer fuel mix. Might feel stronger in the midrange but it will just bog at WOT and it will not increase power. That's assuming the bike has an intake air temperature sensor in the first place - I've seen these kits sold for carburetted vehicles!
On old EFI Ducatis this is not going to help - when they are setup according to factory recommendations, they run rich under normal conditions (the factory manual gives two tuning outlines - one for emissions laws [very lean], and one for optimum performance [very rich]. Guess which one you want to use).
Bottom line - it won't do what they claim, it's incredibly overpriced for something you can do yourself for less than 5$, and it's a poor and slipshod approach to tuning.
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