Mikuni Bds26 Service Manual ((top)) Link
Understanding the Mikuni BDS26 Carburetor The Mikuni BDS26 is a dual-body, downdraft constant velocity (CV) carburetor, most famously used as original equipment on motorcycles like the Yamaha Virago XV250. Unlike direct-slide carburetors, the BDS26 uses atmospheric pressure differentials to move the throttle slide, providing smoother power delivery and better fuel economy for small-to-mid-sized engines. 1. Key Components and Function A standard service involves three primary systems:
- B: Mikuni standard series.
- D: Diaphragm type (Constant Velocity).
- S: Side Draft (or specific angled draft depending on the manufacturer's coding system for this series).
- 26: Venturi diameter of 26mm.
10. Preventive Maintenance
- Periodic inspection intervals, fuel filter recommendations, and storage tips to prevent varnishing
- Guidance on replacing aging rubber parts and seals
By following the procedures outlined in the Mikuni BDS26 service manual, you can: mikuni bds26 service manual
Tools and Materials Needed
- Soak: Submerge the metal body (not rubber or plastic parts) in carburetor dip for 20-30 minutes.
- Scrub: Use a brass wire brush on the jets. Use a wood toothpick or soft copper wire to poke out the tiny holes in the Pilot and Main jets. Do not use steel wire, as it can enlarge the holes and ruin the jetting.
- Blow Out: Use compressed air to blast through every hole you can see. You should feel air coming out of the other side of the carb body.
Regular maintenance is critical to extending the life of your Mikuni BDS26 carburetor. Over time, dirt, dust, and other contaminants can accumulate inside the carburetor, causing problems with fuel flow and engine performance. By following the recommended maintenance schedule outlined in the Mikuni BDS26 service manual, you can help prevent these issues and ensure your carburetor continues to operate smoothly. Understanding the Mikuni BDS26 Carburetor The Mikuni BDS26
4. Disassembly and Cleaning Procedure
Tools Required:
