In the lower end, a one-piece forged crankshaft with automotive style, plain bearing connecting rods and plain main bearings offers greater load capacity and increased engine durability and reduced noise. The cylinder heads were designed with automotive style low-mass rocker arms and a unique cross-flow wedge style combustion chamber.
The fuel system consists of an S&S single bore throttle body and Variable Fuel Injection module, which boasts dual closed loop feedback for fuel control and knock sensing ignition.
The reason we selected the X-Wedge is because it is the most advanced engine available and it takes care of our EPA certification in all 50 states,” explained Jason Neiman, SS Trike President.
More details at http://www.sstrikes.com