Note: This is a design created by a Honda customer/fan. Otherwise, there is no connection between the designer and Honda. This is not an official Honda part. It's not endorsed by Honda and not specifically intended for Honda products. This is a replacement part of the Honda motorcycle CB400 Vtec carburetor idle stop screw knob. My genuine part this knob was broken and I found it was made using a plastic material. So I designed it and made through 3D printing. Because near of an engine is very hot, you have to print using a ABS filament or a heat resistance PLA filament. Do not use normal PLA filament.