Mikuni Bs25 Carburetor Diagram Patched !!top!! -

Appendix: Simplified patched diagram sketch (text-based)

Attached to the bottom of the slide; it moves inside the needle jet to control fuel flow at mid-throttle. Main Body: Slide (Vacuum Piston): The vertical part moved by the diaphragm. Throttle Butterfly Valve: mikuni bs25 carburetor diagram patched

The "patched" diagram for the Mikuni BS25 carburetor is a legendary piece of mechanical lore, born in the early 2000s on greasy-fingered internet forums. It wasn't a factory update, but a community-led "patch" to fix a notorious design flaw in the pilot circuit that caused a lean-stumble on mid-range cruisers like the Yamaha Virago 250. The Origin Story here is the rebuild procedure:

Assuming you have printed or saved the patched diagram, here is the rebuild procedure: mikuni bs25 carburetor diagram patched