Mikuni VM Carb Pilot Air Mixture Screws with new stainless steel springs and Viton O-rings. Qty 4 of each. Enhance the performance of your Suzuki GS1000, GS750, or GS550. Made in Japan from high-quality brass and specifically for us at Centurion Motorcycle Projects. The manufacturer part number and reference OE/OEM number for this screw is 13269-49020. It is a must-have for any carb refurbishment. These are prone to ware in the standard slots, as seen in the pictures. I have these fully customised to my own drawings with special emphasis on a deeper cross slot depth for the screwdriver. I also supply other custom made parts for the Mikuni VM range of carburetors take a look at my other items.