Mikuni Bds26 Service Manual Fixed Access

The Mikuni BDS26 Service Manual: A Deep Technical Dive into a Dual-Throat Constant Velocity Icon

1. Introduction: The Significance of the BDS26

The Mikuni BDS26 is a specialized, dual-throat, constant velocity (CV) carburetor, most famously associated with Harley-Davidson Evolution (Evo) Big Twins from the late 1980s through the 1990s (e.g., FXRs, Softails, Dynas). Unlike the more common single-throat CV40 or CV44, the BDS26 uses two separate 26mm venturis fed by a shared fuel bowl, acting effectively as two carburetors in one casting.

Air Screw Setting: Approximately 1.5 to 1.75 turns out from lightly seated.  Service Resources & Documentation  mikuni bds26 service manual

Cleaning: Use compressed air and carburetor cleaner to clear all jets and passages of varnish or deposits. The Mikuni BDS26 Service Manual: A Deep Technical

Jet Removal:

Float Bowl Disassembly:

1. Online Manuals and Forums:
   1. Install Pilot Screw: Screw in gently until seated, then back out to the recorded setting. (Factory default is typically **1.5 to 2

   5. Reassembly & Tuning

   Step A: Float Height Adjustment

   This controls your fuel level.

   2.2 Exploded Parts Diagram

   Because parts are nearly impossible to find, the manual must include a detailed exploded view with OEM Mikuni part numbers. Key components: Online Manuals and Forums :