This Yamaha flanged head nut is a great fit for the KT100. It's made of 8mm steel, providing durability. As shown on the diagram, it comes in sizes #6 and #9, perfect for your specific needs.

Using this Yamaha flanged head nut is easy. Just place it in the appropriate position on your KT100 as per the diagram. Make sure it's properly aligned before tightening. When handling, be careful not to drop it to avoid any damage. For maintenance, keep it clean and dry. You can use a mild cleaner to remove dirt if needed. Check it regularly for any signs of wear or damage and replace it if necessary.