Some R11xx riders have replaced the stock regulator on that bike, rated at 3.0 bar, with adjustable aftermarket ones. End result was that the bike ran smoother and had better throttle response with the pressure set to 3.3-3.5 bar. Inmate hasenwerk nicely describes his upgrade in this thread: http://www.advrider.com/forums/showpost.php?p=17259810&postcount=72 The R1200GS and HP2 Enduro have stock regulators set to 3.5 bar. I have my HP2 apart right now and have already rebuilt much of the fuel system (including switching to an external fuel pump -- the original in-tank pump broke). I'm now toying with adding one of these: http://www.summitracing.com/parts/aei-13159/overview/ Anyone go down this road before?