X4 aluminum layshaft is strategically CNC-machined to attenuate rotating fat without compromising energy or integrity. The accuracy layshaft minimizes runout, eliminating drivetrain vibration and producing a confident security. The layshaft includes two exchangeable bearings to aid expand decrease drivetrain vibration. The layshaft features super slim design and a square type where in actuality the pulley is keyed on set up. The pulley is guaranteed in full by an O-ring and/or C-clip with regards to the motorist choice. Machined from premium Swiss 7075 T6 aluminum and black colored anodized.