Mikuni BS25 is a Constant Velocity (CV) carburetor commonly used on 150cc engines (like the GY6 150cc) and certain vintage motorcycles. While there is no official "patched" diagram, a "patched" guide typically refers to a visual walkthrough
Modern DIY mechanics need the "patched" version because it bridges the gap between a sterile parts list and the reality of 20-year-old ethanol-damaged rubber. mikuni bs25 carburetor diagram patched
How to adjust the air mixture screw on a Mikuni carb with the choke down? Mikuni BS25 is a Constant Velocity (CV) carburetor