Sound a little too good to be true?
Yes, I had a mate that put one on a 955 Sprint, which did exactly that. The chip only cost $25 though and was supplied by the local dyno shop. He was running the standard tune with an aftermarket can and his bike DID seem noticeably quicker with the chip but I doubt very much it was anything like 25bhp more. I think he could have probably had a better result just paying a few bucks to get the dealer to download the TORS tune.A resistor on the temp sensor is NOT going to produce good power on the S3. It will simply tell the ECU that the engine is operation at a cooler temp and increase fueling everywhere.