The official factory diagram (available in service manuals) shows 47 individual parts. It is a standard exploded view: a center line with the main carb body, parts floating left and right with leader lines to part numbers.
Original factory diagrams often omit:
Appendix: Simplified patched diagram sketch (text-based) mikuni bs25 carburetor diagram patched
| Symptom | Likely Clogged Circuit per Patched Diagram | |--------|---------------------------------------------| | Starts cold, dies when warm | Enrichment circuit jet (#22.5) | | Idles poorly, stalls at stops | Pilot jet or mixture screw passage | | Bog at 1/2 throttle | Vacuum piston diaphragm tear | | Won’t rev past 4000 RPM | Main jet blocked or needle clip slipped | | Fuel dribbles from overflow | Float needle valve or float height | The official factory diagram (available in service manuals)