Editor's note: Due to the timing of the release of Harley's new models and our print schedule, in this issue we're giving you just a brief glimpse into some of the highlights of what Harley has to offer riders for the new model year. Next month we will give you an in-depth, more comprehensive look at the entire lineup.
If you haven't yet had the chance to check out the '07 Harley-Davidson models, drop everything right now and hightail it to your nearest dealer. Harley's engineers have no doubt rolled up their sleeves and burned the midnight oil for quite some time in order to really shake things up, bringing all kinds of great new products to the table. Highlights for '07 include a new larger-displacement engine; six-speed transmission; all EFI induction (no more carburetors, period); a new 50th-anniversary-model Sportster; a new Softail; two new V-Rods; four CVO models; quieter drivelines; deeper-toned exhausts; more fat tires; stronger, narrower drive belts; a new smart security system; and a whole lot more.
Without a doubt the biggest change has got to be the increased-displacement engine that resides in all '07 models, with the exception of the Sportster and V-Rod families. To accentuate this larger displacement even more, the four CVO models have the largest-displacement engines ever offered by Harley-Davidson, weighing in at a whopping 110 inches!
Going forward from 2007, the standard powerplant for all Big Twin models (except CVO models) will be the all-new Twin Cam 96 (96 cubic inches of displacement). The motor will be offered in two different styles: the TC 96, a rubbermount that's designed to power the touring and Dyna families, and the TC 96B solid-mount motor (complete with counterbalance shafts), which will be fitted to the line of eight Softail models.
In order to build the new TC 96 and associated Cruise Drive transmission, Harley has added more than 700 new part numbers, with many of them in the bottom end of the engine.
The new motors reach the new higher-displacement figures by increasing the stroke from 4 inches to 4-3/8 inches while leaving last year's bore of 3-3/4 inches intact. This change has multiple positive effects, including an approximate 17-percent gain in torque, not to mention quieter engine internals due to redesigned flywheels, connecting rods, and pistons. Lower sound levels are also achieved by the reduction of decreased reciprocating mass of the engine. Another benefit of the new engine is the ease and low cost involved when increasing the displacement to 103 inches. For top-end work only, we're told the cost for the kit and labor will run somewhere in the range of $1,200. To see for ourselves, we've already ordered up the parts necessary for the conversion-keep an eye out for that in an upcoming issue.
The six-speed Cruise Drive transmission used in the '06 Dynas is being used in conjunction with all the '07 Big Twins. Features such as helical-cut gears, optimized gear ratios, and a direct-drive six-speed add to the transmission's overall performance. Coupling the motor and trans is a redesigned primary drive. Both internally and externally, the drive sports new features and styling, including a redesigned compensator, a self-adjusting primary chain adjuster, and a new starter system that was designed to bolt directly to the inner primary, thus eliminating the need for the starter jackshaft used on previous models.