X4 aluminum layshaft is strategically CNC-machined to attenuate rotating fat without compromising power or integrity. The accuracy layshaft minimizes runout, eliminating drivetrain vibration and creating a confident safety. The layshaft includes two exchangeable bearings to help expand decrease drivetrain vibration. The layshaft features super slim design and a square kind where in actuality the pulley is keyed on setup. The pulley is assured by an O-ring and/or C-clip in line with the motorist option. Machined from premium Swiss 7075 T6 aluminum and black colored colored colored anodized.