Baph

For the techie's on the forum:

The BPR circuit is pretty simple. It sits in parallel with anything that you want to limit (it's sort of how speed limiters work in fact - esp for FI systems).

Basically, you put a resistor just before the BPR, so that the BPR will only ever get a voltage when the entire system voltage exceeds X. The BPR's job is to feed back to a variable resistor in series, way before the entire system. All the BPR has to do, is keep it's own voltage to zero, by influencing the variable resistor.

So, in this example, lets say that 5v means your bike is doing 70mph, and it's limited to 85mph by the limiter. Setup the input to the BPR so that it doesn't have any power unless the system voltage exceeds 5v (you exceed 70mph). As soon as the BPR has power, it changes the variable resistor. When the BPR doesn't have power, the resistor goes back to it's "resting state" & the system acts like the BPR doesn't exist.

In theory, the limiter never thinks you've gone above 70mph. In reality, it might think you've gone to 72mph, but you can't be prosecuted for that Your bike meanwhile, can scream along at 130mph, because the limiter thinks you're doing 72mph constantly. (Naturally if the output to throttle is governed by the limiter, then you'd need to add another couple of wires to compensate for the BPR values and add those on to the limiter output, but even that aint difficult).

Hiding the GPS signal, hell, I'll give my 2yr old my soldering iron to play with your bikes with, I'm sure he could manage it