A sample from the products for the Accessory(grip Heater) include: Grip-heater Z900rs, Harness,sub, Bolt,socket,8x40, Bracket.
On this parts fiche the Bolt-flanged,6x25 is the most specified component.
The component with the lowest price in the ACCESSORY(GRIP HEATER) schematic is the Bolt-flanged,6x25.