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Help Inner Carb Funnel Needed - MC22

Discussion in 'Honda 250cc In-line 4's' started by wingsup2wheelsdown, Feb 26, 2024.

  1. wingsup2wheelsdown

    wingsup2wheelsdown Member Premium Member

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    In the process of working on two winter projects and one of my winter projects (1990 CBR250RR MC22) had a bent funnel/velocity stack. I can't seem to locate one for sale, any recommendations for moving forward or know of a source.



    Thanks!

    20240225_184530.jpg 20240225_184536.jpg
     
    Last edited: Feb 26, 2024
  2. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Part #16141-KAZ-000 - FANNEL AIR


    mc22 part.png
     
  3. wingsup2wheelsdown

    wingsup2wheelsdown Member Premium Member

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    Thanks, I have the part number but 16141-KAZ-000 and 16142-KAZ-000 don't come back to anything in stock anywhere.
     
  4. KiwiMat

    KiwiMat Well-Known Member

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  5. wingsup2wheelsdown

    wingsup2wheelsdown Member Premium Member

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  6. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Why not just straighten it, it's very soft aluminium, avoid using metal tools on it and stick to wood, thing like hammer handles and the like.
    I think you'll be surprised at how easy it is.
     
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  7. thebeefsalad

    thebeefsalad Well-Known Member

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    I may have an extra set that came with the airbox. give me a day or two to get out to the garage and dig them up
     
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  8. thebeefsalad

    thebeefsalad Well-Known Member

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    I do have an extra set. There are slight dings that may be hard to show but I can try and snap pictures if you want
     
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  9. thebeefsalad

    thebeefsalad Well-Known Member

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    now I'm confused... All 4 stacks appear to be the same height. I swear the inner ones are supposed to be taller. There is only 1 in almost perfect shape, but it has a ding on the outside of the lip. I can throw you dimensions of what I've got and pictures to see if its what you need.
     
  10. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    I have read that for racing, when people can get their hands on them, the two inner stacks are replaced with the shorter outer stacks.

    IIRC the length difference is there to assist in getting through a dip in the torque curve as the engine comes onto the cam.
     
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  11. inchoate

    inchoate Well-Known Member

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    I was just in my airbox today and on an MC19 the outer and inner velocity stacks are two different lengths. looking at @GreyImports parts diagram it looks like they're all the same part on the MC22.
     
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  12. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    That parts list shows that RRL and RRN have 2 different Vleocity stacks and RRR & RRR-2 have all 4 the same.
    I would assume there are some engine or carby etc differences to account for that as all 4 designations appear to be be for MC22. POssibly different year models...
     
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  13. wingsup2wheelsdown

    wingsup2wheelsdown Member Premium Member

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    I found someone one facebook who had a set attached to a parts carb in Australia who was willing to ship them state side. I have procured a good one and now have a spare carb bank to rebuild and have ready when I need it.

    While I have folks attention. I have never played much around with Carburetors with the exemption of airplane/bendix carbs. When rebuilding the carburetors is it recommended to treat the O-rings with fuel lube or silicone grease? or assemble dry?

    This is what I am referring to. EZ Turn Lubricant | Aircraft Spruce
     
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  14. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Usually a light coat of rubber grease. Silicone grease would work too.

    Keep in mind that most of o rings in carburettor will slightly swell after some time in contact with fuel and this is factored into the design.
     
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  15. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    I use INOX .... in fact I use it for everything .... every nut, bolt, screw ,thread ,electrical or wateva

    INOX3A12-KT.jpg
     
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