While exact settings can vary by vehicle model (e.g., the Hyosung GV250 uses a "BDS26" variant), standard verified specs for the BS26 include: Standard Specification Idle RPM 1,400 ± 100 RPM (Typical) Float Height ~17mm (varies by application) Pilot Screw 1.5 to 2.0 turns out from seated 3. Maintenance & Cleaning Procedure
Spray intake boot with carb cleaner to check for leaks; check cable routing.
A "verified" rebuild ensures that all internal passages are clear of ethanol deposits and varnish. mikuni bs26 carburetor manual verified
To service the BS26 accurately, you must adhere to factory tolerances. Using the wrong torque or fuel levels will cause poor engine performance, hard starting, or fuel overflows. 26mm
Fix: Replace diaphragm or polish the slide walls with fine steel wool. While exact settings can vary by vehicle model (e
The Mikuni BS26 is a 26mm constant velocity (CV) carburetor. It controls fuel delivery on many small-displacement motorcycles, ATVs, and scooters. This manual details how to strip, clean, tune, and rebuild your Mikuni BS26 carburetor. Understanding the CV System
The Mikuni BS26 relies on three primary fuel circuits to deliver the correct air-fuel mixture across the entire throttle range. To service the BS26 accurately, you must adhere
Flip the carburetor over and remove the four bowl screws. Lift the bowl off gently to avoid damaging the gasket.
“You need to drill out a plug to adjust the pilot screw.”
Turn the pilot mixture screw clockwise until it seats lightly. Back it out to the factory setting you recorded during disassembly, or use 2 full turns out as a baseline. Idle Synchronization