Mikuni Bds26 Service Manual Jun 2026

Modern ethanol fuel causes internal corrosion and clogged pilot jets if left sitting. Use fuel stabilizer.

Drop the jet needle into the slide, lock it with the retainer, and lower the slide assembly into the body.

Remove the top screws to access the diaphragm and slide. Handle with care ; these are delicate. 4. Cleaning and Inspection

Aerosol cans with a precision straw.

The BDS26 features a 26mm bore and relies on a vacuum-operated diaphragm to lift the slide, ensuring consistent air velocity.

Turn the carb upside down, remove the four screws on the bottom.

: These smaller cruisers typically use a single carburetor. mikuni bds26 service manual

Unlike single-carb setups, the BDS26’s single float controls fuel for venturis. An incorrect float height causes:

Replace all rubber components. Reusing flattened or fuel-swollen O-rings leads to air leaks and fuel weeping. 5. Reassembly and Float Height Adjustment

Remove the top cap (4 screws). Carefully lift out the vacuum piston/diaphragm assembly. Do not use solvent on the diaphragm. Use only soapy water. Soak the metal body in carb cleaner for 4 hours, but remove all rubber first. Modern ethanol fuel causes internal corrosion and clogged

After rebuilding, the carburetors must be synchronized so they open simultaneously.

Spray carburetor cleaner directly into every passage, jet, and orifice.

Would you like this reformatted as a printable PDF excerpt, or adapted into a quick-reference card for the toolbox? Remove the top screws to access the diaphragm and slide

During assembly, ensure the slide housing o-ring is seated correctly. Because the recess is shallow, some builders use a fuel-resistant gasket cement like Permatex #85420 to keep it in place.