Drop the spring, small washer, and new lubricated rubber o-ring onto the pilot mixture screw.
Blow compressed air through every internal channel to remove residual cleaner and dislodged debris. Reassembly and Critical Adjustments
Since Mikuni does not publish a standalone manual for the BDS26, you must search for specific bike models. Here is how to find the right data:
Inspect the rubber tip of the float needle for a ring-shaped groove or wear. If it is grooved, it must be replaced to prevent flooding. 3. Jet Removal
Carefully lift the cap, holding it down slightly to counteract the internal spring pressure. Remove the compression spring.
to access the main and pilot jets. Ensure the pilot jet is completely clear, as its tiny orifice often clogs with old fuel.
Many backyard mechanics rely on generic tuning guides. That is a mistake for the BDS26. Here is why the official service manual is irreplaceable:
📘 Refer to Appendix C for jetting curves based on altitude and exhaust type. Unapproved modifications to the vacuum port drilling will cause tunability loss.
If you are looking for specific parts for a , you may want to consult rebuild kits for similar Mikuni BDST carburetors .
Install the needle valve, hook it to the float, and insert the float pin.
