Bottom-end differences aside, the new Softail engine, dubbed the Twin Cam 88B, packs the attractions of the original Twin Cam engine, introduced a year ago. Although it's an air-cooled, single-crankpin design laid out with the same 45-degree V-angle, knife-and-fork connecting-rod arrangement, two valves per cylinder, pushrod valve operation, and a single carb, the new Twin Cam series has many advantages over the old Evo design. The new engines are bigger at 1450cc than the old 1340cc engines, with a shorter stroke for better breathing and a higher compression ratio. Down in the crankcase, silent-type chains operate the two camshafts. The engines are quieter than the Evos because of their more modern design. They are also burlier, with a bigger straight crankpin, stronger cases, better lubrication, stouter bearings and countless other improvements. The engines are easier to assemble and service, too. Like the original Twin Cam the counterbalanced version is easily distinguished by its oval air cleaner, which appears to offer more volume for better breathing.