Aluminum 2-speed owner bulkhead is split from back bulkheads to supply appropriate flex and maximum traction. The bulkheads have actually another mounting destination ââ¬â 3 screws in place of 2 ââ¬â also for greater reinforcement concerning the rear layshaft area and enhanced on-power safety. The ball-bearing is set up in a composite bushing to eradicate vibration from motor. The master is CNC-machined from premium Swiss 7075 T6 aluminum to ensure the lightest & strongest support framework the 2-speed. Ebony color.