Mikuni Bds26 Service Manual [ Genuine ⟶ ]

The Mikuni BDS26 is a 26mm downdraft, constant velocity (CV) carburetor renowned for its reliability and smooth throttle response. It served as the standard fuel system on a wide range of popular small-displacement motorcycles throughout the 1980s, 1990s, and 2000s.

If you need to know the specific jetting or float height for a particular year of the Hyosung GV250, I can try to find that specific data. Share public link

Here are some trusted resources and compatible parts for the BDS26:

Document each stage with photos to ensure correct reassembly. Work on one carburetor body at a time if you are uncomfortable keeping components separated. Step 1: External Component Removal mikuni bds26 service manual

Before beginning the teardown, familiarize yourself with the internal architecture of the Mikuni BDS26. Standard Factory Specifications (Yamaha XV250 Reference)

Do not use standard Phillips screwdrivers; they will strip the soft brass jets and aluminum body screws. Chemical-Resistant Nitrile Gloves & Safety Glasses

Gently turn the pilot screw clockwise until it stops, then back it out 2.5–3 turns. 6. Tuning and Troubleshooting The Mikuni BDS26 is a 26mm downdraft, constant

What (coughing, leaking, stalling) are you trying to fix?

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.

Flip the carburetor upside down. Remove the four screws holding the float bowl. Share public link Here are some trusted resources

Referencing this GV250 manual , typical specifications include: Mikuni BDS26 Bore Size: 26mm Float Height: 14.6mm ± 1mm Idle Speed: 1400 ± 100 RPM

Introduces extra fuel for cold starts.

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:

[ Carburetor Body (Inverted) ] ------------------------------------- | <- Gasket Surface (No Gasket) [ Float ] | <- Measure Distance Here (13.5mm - 14.5mm) -------------------------------------