I think the tuner was correct. My tuner completely eliminated the dip in power and torque at VTEC tranisition and the bike is very smooth now. Horsepower and torque increased slightly (100.06 HP and 53.65 torque). No backfiring or sputtering. The problem with tuning for maximum peak power on these bikes is pretty fundamental - you can't change the character of the engine very much with exhaust modifications, air filters, and EFI mapping. These bikes will never produce a lot of torque. But you can dramatically improve smoothness and ridability with these mods. Given that, I vote for smoothing.