88hp is the stock output at the wheel. The Honda claimed 106hp is just the engine numbers on a bench dyno, no drivetrain loss. As far as why they started that low with the add-ons, you probably guessed right. The previous owner has taken the time to swap out to a 1300 final drive to lower the cruising RPMs for better gas mileage so it is a good bet he had the PC3 tuned for best MPGs not power. Unless you are racing, there's really no need for max power. As far as the accelerator pump feature, leave it off. It just wastes fuel and as the VTX runs rich at the mid and upper ranges, it's just dumping more fuel where there is too much already.