Mikuni Bs26 Carburetor Manual Verified Better May 2026

The Mikuni BS26 is a 26mm Constant Velocity carburetor utilizing a vacuum-operated diaphragm, commonly tuned with a pilot screw set 1.5 to 2 turns out. Key maintenance involves cleaning the jet circuits, checking for varnished fuel, and ensuring the float needle seats properly. For detailed schematics, view the Mikuni BS26 Manual on Scribd

Measurement: Measure from the gasket mating surface to the highest point of the float. For many BS26 models, this is 7.2mm (center of the spec range). mikuni bs26 carburetor manual verified

• Connect manometer to vacuum ports on intake boots.
• Adjust balance screw until both gauges read equal at 2000 rpm.
• Maximum allowable difference: 20 mm Hg.

Specs re-verified:

Title: Finally, a verified and accurate resource for the BS26 The Mikuni BS26 is a 26mm Constant Velocity

Step 3: The Pilot Air Screw (PAS)

Every "verified" manual warns about this: Do not force the PAS. The BS26 uses a fine-tip screw with a tiny O-ring and washer. Connect manometer to vacuum ports on intake boots

Before making adjustments, always ensure the engine is fully warmed up and the air filter is clean. Mikuni Bs 26 Manual - MCHIP

Here are the key specifications of the Mikuni BS26 carburetor: