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Help CBR250rr project - pilot screw setting

Discussion in 'Honda 250cc In-line 4's' started by Mar7inez13, Nov 24, 2016.

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  1. Mar7inez13

    Mar7inez13 Member Premium Member

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    Yea bud they are new main jets new o rings and seals i stripped down the whole thing and I have started the bike and it running but I cant get it to start with out throttle
    And the revs are all over the place example; it will fire with throttle, then you will have to hold the throttle for a few minutes till the revs pick up, then the revs will jump to 6000rpm, ill let got of the throttle and twist the idle screw out till it drops down to 2000 -1500rpm about 30 seconds after this it will die...
    (This is what happened yesterday when i had 20min to play with it)
     
    Mar7inez13, Nov 29, 2016
    #41
  2. Mar7inez13

    Mar7inez13 Member Premium Member

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    Thanks kiffsta if i can organize a trailer i might take you up on this offer
     
    Mar7inez13, Nov 29, 2016
    #42
  3. Damus

    Damus She is a BEAST and riding it is comparable to sex Dirty Wheel Club

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    It sounds like you have taken steps backwards, if the revs are all over the place you have probably got a vacuum leak now. The rubber boots probably have a tear in them or something.
     
    Damus, Nov 29, 2016
    #43
  4. Joker

    Joker See "about me" for contact details. Contributing Member

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    Sure you put the right jets in the right holes...?
     
    Joker, Nov 29, 2016
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  5. kiffsta

    kiffsta Senior Member

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    You can't mix them up on a mc22 like you can on an fzr
     
    • Like Like x 1
    kiffsta, Nov 29, 2016
    #45
  6. Mar7inez13

    Mar7inez13 Member Premium Member

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    The carb boots were fine before I put them on...
    Im going to cry if its a vaccum leak
    They haven't been synced with a set of vaccum gauges just a rough bench syncing

    Ps my 18mth old son managed to put a vics bottle down my exhaust, i didnt know about until it shot out and hit the garage door
     
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    Mar7inez13, Nov 29, 2016
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  7. kiffsta

    kiffsta Senior Member

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    it should breath easier then :imtheking:
     
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    kiffsta, Nov 29, 2016
    #47
  8. Mar7inez13

    Mar7inez13 Member Premium Member

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    This is true lol
     
    Mar7inez13, Nov 29, 2016
    #48
  9. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    GreyImport, Nov 29, 2016
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  10. Damus

    Damus She is a BEAST and riding it is comparable to sex Dirty Wheel Club

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    Yeah I remember thinking my boots where fine too until I took an arrow to the knee. The boots are a fickle fickle son of a b****. Depending whether they are OEM or not plays a big factor because basically if they are Chinese I found that tightening the clamps to 100% tightness will slice a hole in them. The OEM ones (rare for L/N model here in aus) you can fully tighten.

    At this stage if your idle was fine and it reved up to a certain point just fine 100% of the time but now the revs are all over the place and wont idle properly you have done a boo boo. I would order a new carb seal kit from @maelstrom and bend the boots inspecting closely for holes or tears. Apart from the boots it is possible you may have over tightened the pilot screws when setting them which can damage the seals and there is a tone of other seals worth replacing also.
     
    Damus, Nov 29, 2016
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  11. Damus

    Damus She is a BEAST and riding it is comparable to sex Dirty Wheel Club

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    On the same token it could be something stupid like you forgot to turn the fuel back on at the petrol tank =).
    Its hard to diagnose these problems without being there having all the info etc.
     
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    Damus, Nov 29, 2016
    #51
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