... in this case, for BMW bikes made after 1996, using Motronic or BMS, it’s just a simple sounding idea.
The BP is a well-made device that does a good job of shifting the temperature in a predictable manner. It has a remote probe so it’s even possible to measure intake air temperature. All good ... except that the BMW bikes use short term and long term trims and an O2 sensor to confirm fueling and CORRECT IT if it is not as planned by the ECU. BP has even written a “book” (PDF file) to explain their theory of operation, which conveniently omits Long Term Trims.
Dobeck (Techlusion) and Power Commander understand Trims and instruct you to remove the O2 sensor.
Here is a link to detailed measurements that demonstrate Long Term Trims and the negation of BP and fuel pressure increases:
https://advrider.com/f/threads/2004...-af-xied-for-bmw.749080/page-40#post-23675190
BP is not a US company, but I’m not surprised at all that they have been selling millions of dollars worth of these and they don’t work. Things like this happen all the time. BP was so good sounding it was the first add-on I bought for my bike in 2011. Fortunately for me, I’m from the Test and Measurement Industry. And when it didn’t seem to be doing much I researched it, then measured it. It sits on my bench as a reminder.