Some items from this specific schematic: Battery Assy(yb4l-b,12v4.2ah), Hose,battery Exhaust, Clamp, Protector(170x95x3.0).
With two applications this Protector(170x95x3.0) is the most specified part.
Of all the components used in this assembly the Battery Assy(yb4l-b,12v4.2ah) is the most expensive.