In addition to the high-tech electronics, the Sportster S benefits from a point more compression (a 10.0:1 ratio instead of the standard 1200's 9.0:1), less restrictive mufflers, and special camshaft profiles. Harley says that the changes boost the 1200's torque by an average of 15 percent throughout the range and almost 10 percent (78 versus 71 foot-pounds) at 4000 rpm. All '98 Sportsters have a more efficient oil pump to improve scavenging from the dry sump. Running the quarter-mile in 13.39 seconds at 95.2, the Sport is, by a slim margin, the quickest Harley in recent memory, even outrunning the light 1200 Custom. The Sport also feels stronger and slightly more responsive at all rpm, and is most improved at the normal operating rpm. You can feed it full throttle at 2000 rpm without lugging, and it will pull to 6000 rpm. However, the engine's mechanical capabilities limit high-rpm operation less than the rider's tolerance for vibration. By 4000 rpm, the shaking, particularly through the short handlebar, is pretty uncomfortable. On the road, you're massaged with a low-frequency shake of moderate amplitude at 55 mph, but the speed and power of the vibration begin to infringe on comfort by 65 mph and make it downright unpleasant by 75 mph.