Over the years, I've taken a fair amount of heat from some folks who think the dyno is the be all and end all for tuning. Yet Mountain Runner / Mountain Runner Premium wouldn't exist if not for my willingness to datalog and street tune. Smooth engine braking can't be built on a dyno, it's something that must be done by actually riding and tuning from the riders perspective. Here's a video that explains the differences in tuning methods very well. Nope, not me, but he's 100% spot on. Enjoy!