Old's Cool Choppers
Zink extended Amal 900 series carburetor fuel and idol mixture screw with o rings
Polite Air Screw is the pointy one
Throttle Stop is the flat bottom one
Works on all Amal brand 900 series carburetors and will bring added fine tuning adjustment to your bobber and chopper motorcycles as well as performance enhancement to your race inspired cafe racer.