Governs the fuel-air mixture at wide-open throttle.
Before turning any screws, ensure you are working with the correct parts. A standard BS26 typically features: 26mm
Houses the rubber diaphragm, slide, return spring, and needle.
Use a caliper to measure the distance from the machined gasket mating surface (with the gasket removed) to the highest point of the float profile. mikuni bs26 carburetor manual verified
Align the alignment tab on the outer perimeter of the vacuum diaphragm with the matching indentation on the top rim of the carburetor body. If it is misaligned, the slide will bind. 6. Tuning and Troubleshooting
Located next to the main jet inside a recessed well. It manages fuel delivery from idle up to 1/4 throttle. 3. The Float Chamber Assembly
Always check your specific bike's workshop manual for exact jet sizes and float height measurements. Mikuni Power : Official site for parts and generic tuning. Governs the fuel-air mixture at wide-open throttle
2.5 turns out from lightly seated. Fine-tuning method:
The information provided in this manual is for general information purposes only and should not be considered as a substitute for professional advice or consultation. Always consult the manufacturer's documentation and seek professional assistance if you are unsure about any aspect of carburetor installation, adjustment, or maintenance.
The Mikuni BS26 is a robust, well-mannered carburetor when set correctly. trace back to three things: dirty pilot jets, incorrect float height, or a torn diaphragm. Using this verified manual will resolve those issues without guesswork. Use a caliper to measure the distance from
The Mikuni BS26 is a 26mm constant velocity carburetor, common on small-displacement motorcycles and ATVs, featuring a 24mm float height and a pilot screw setting of 1.5 to 1.75 turns out. Proper maintenance requires cleaning the pilot jet to prevent idle issues, inspecting the diaphragm for tears, and setting the float height precisely to avoid overflow. For comprehensive documentation and diagrams, refer to scribd.com
Whether you are troubleshooting a bogging engine, performing a routine cleaning, or completing a full rebuild, this verified manual provides the exact specifications, procedures, and routing diagrams required to restore optimal performance. 1. Technical Specifications and Factory Jetting