While governmental EPA and CARB compliance were high on the S&S list when conceiving their new engine, another major issue was to resolve problems associated with large-displacement V-Twins. Although the V-Twin industry is synonymous with the 45-degree V configuration, engine builders have always contended that the main limiting factor of performance is the construction of the flywheels. Current designs have the flywheel pressed or bolted together. These construction techniques can lead to flex or movement of the assemblies in relationship to one another, resulting in degraded engine performance. Also, as displacement grows, and the weight of the reciprocating mass increases, vibrations increase as well and can become outright uncomfortable. Another ongoing issue for many years with V-Twins is excessive crankcase pressure and oil carryover. So, S&S decided to start from square one and come up with a new design that would avoid these potential issues. Thus, the X-Wedge engine program was born. Configuration of the X-Wedge is a departure from the engines S&S has historically produced. The major difference both technically as well as atheistically is now (instead of being a 45-degree angle) 56.25-degree to address concerns of space limitations. Another major departure from current engine design is the use of three camshafts. A major reason for multiple cams is to provide for nearly straight pushrod angles. The X-Wedge is available only with fuel injection. The engine will be making its debut sometime in the fall of 2007 in select Big Dog Motorcycle models as well as models from some other OEMs. Customers will be able to purchase the X-Wedge in either a raw finish with polished fins, black finish with polished fins or completely polished. X-Wedge Engine.