With vibration blocked, the rider has an opportunity to appreciate the pleasant characteristics of the Sportster 1200 engine. Throttle response remains linear, with little abruptness if you get ham-handed. The drivetrain has no lash, and minor refinements have made shifting smoother, lighter and quieter. The clutch is still a bit heavy to pull (the 883's clutch effort has been lightened, though), but engages predictably and smoothly. We used to twist the throttle to prime the engine with the throttle pump for cold starting, but that no longer seems to be effective. The new engine just wants choke, and is fairly cold-blooded, requiring several minutes before it will run smoothly. If you take the choke off before that, it will often stumble as you open the throttle. Even when warm, it likes to have its throat cleared (by revving it once) after idling, or it will sometimes cough as you apply throttle and clutch. The rpm limit is no longer set by how hard you can stand to get shaken, but rather by the engine itself. Rev it too high (easier with the Custom, which lacks a tachometer) and you will encounter the rev limiter, which gradually deprives you of power.