Aluminum layshaft is strategically CNC-machined to attenuate rotating weight without compromising power or integrity. The precision layshaft minimizes runout, eliminating drivetrain vibration and creating a confident security. The layshaft includes two pressed-in bearings to simply help expand reduce drivetrain vibration. The layshaft features super narrow design and a square shape where in actuality the all-new pulleys are keyed on construction. The pulleys are secured by an O-ring and/or C-clip based on the drivers choice. Machined from premium Swiss 7075 T6 aluminum and black colored colored anodized.