Mikuni Bds26 Service Manual Better Page

The Mikuni BDS26 service manual is the essential roadmap for maintaining the 26mm double carburetors found on bikes like the Yamaha Virago 250 V-Star 250

Where to Find a Free or Downloadable Mikuni BDS26 Service Manual PDF

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Step B: Top End (Diaphragm & Slide)

  1. Remove the four screws on the top cap.
  2. Carefully lift the cap. The spring and diaphragm/slide assembly will come out.
    • Remove the top cap screws (usually 2 or 4).
    • Remove the spring and the diaphragm/vacuum slide assembly.
    • Caution: The diaphragm is rubber and fragile. Do not use sharp tools.
    • To remove the needle: Inside the bottom of the slide, locate the retainer (often held by a clip or friction fit). Remove the E-clip to adjust needle height if necessary.

    Setting the Float Height:For the Mikuni BDS26, the float height is typically measured from the gasket surface (without the gasket) to the top of the float while the carb is tilted so the float tang just touches the needle pin. The Mikuni BDS26 service manual is the essential

    Main Jet (M.J.): #90 (Front), #87.5 (Rear) — Note: Jets may differ between front and rear cylinders. Pilot Jet (P.J.): #20 Jet Needle (J.N.): 2nd clip position (Standard) Remove the four screws on the top cap

    Bogging at High RPM: Main jet blockage or a tear in the diaphragm.

    Free Online Repositories

    • Manualslib.com – Search “Mikuni BDS26” – often includes user-submitted scans.
    • ArcticChat.com or DooTalk.com forums – Use the search function. Members frequently upload BDS26 service bulletins.
    • Vintage Snowmobile Library (vintagesnow.com) – An excellent free resource with scanned Arctic Cat and Yamaha manuals that contain BDS26 sections.

    8. Troubleshooting Guide

    • Common symptoms and causes: