If the engine RPMs increase when turning the mixture screw clockwise, the idle circuit is lean; if they drop, it is rich.
While there is no official industry term "patched" for carburetor diagrams, it typically refers to a often shared in enthusiast forums to address common issues like vacuum leaks or "unidentifiable" ports. Key Components of the Mikuni BS25 mikuni bs25 carburetor diagram patched
If you use the Mikuni BS25 diagram from a generic PDF, you will make three predictable mistakes: If the engine RPMs increase when turning the