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Thread: Best carb size ?

  1. #1
    Join Date
    18th October 2021 - 07:26
    Bike
    Yamaha slider and neos zx9r
    Location
    Sweden
    Posts
    2

    Best carb size ?

    Hello
    I have Yamaha slider and att THE moment i have
    Stage6 6 MK 2 70 cc sport pro with 21 mm stage6 RT carb pwk.
    STAGE6 RACING CLUTCH
    STAGE6 R/T OVERSIZE CVT KIT MK II D=107MM.
    STAGE6 R/T CLUTCH BELL 433G.
    STAGE6 PRIMARY TRANSMISSION
    STAGE6 INTAKE KIT MK2 OVERSIZE with STAGE6 V-FORCE 3 REED Valve
    Yasuni c 16 carbon exhaust.
    Ported engine block mm
    MVT INTERNAL ROTOR IGNITION PREMIUM WITH LIGHTING.
    And hpc crank with c4 bearing SKF with polini viton sealings.

    I have bought THE MXS RACING CYLINDER KIT 70 CC
    AND WONDER WHAT IS THE BEST CARB SIZE FOR THIS ?

    ANY THOUGHT ? OR RECOMENDATIONS?

    BEST REGARDS STEVEN

  2. #2
    Join Date
    12th February 2004 - 10:29
    Bike
    bucket FZR/MB100
    Location
    Henderson, Waitakere
    Posts
    4,196
    The 21mm carb is probably just fine. You could probably stretch to a 24mm carb but I think 28mm would definitely be on the too big side. You have to be able to tune it and ride it. you might get more power with a bigger carb but you can run into difficulties.

  3. #3
    Join Date
    25th March 2004 - 17:22
    Bike
    RZ496/Street 765RS/GasGas/ etc etc
    Location
    Wellington. . ok the hutt
    Posts
    20,500
    Blog Entries
    2
    I've been holding off , but here we go. 100% 39mm PWK.
    Then just graft on a KTM300 barrel to match. Made for each other.
    Don't you look at my accountant.
    He's the only one I've got.

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