Carb setup

Discussion in 'The Garage' started by smudger, Oct 15, 2013.

  1. smudger

    smudger I Love SV650's

    Honda say 2 turns out so all way in then 2 turns out whilst carbs off

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  2. lee

    lee Moderator Staff Member

    Yeah but what did you turn out?
    Only screws I could see was for the pilot?
    Im no carb expert.
    But I always thought the only way to adjust the fuelling on the mains was to change the jets ie a dynojet kit?
     
  3. smudger

    smudger I Love SV650's

    There are 4 screws 1 for each carb sumtimes its like a D shape but mine were all pozzie

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  4. Dooffle

    Dooffle New Member

    From what I've read you still have to set 3 first then bring the others to it.
    The base setting is still when the butterfly is fully closed with a closed throttle.
     
  5. Dooffle

    Dooffle New Member

    The majority of 4 carbs only have 3 setting screws, as you say match 3/4 then 1/2 then the pairs together.
    The adjusters lift 1 butterfly and drop the other (think see saw) so 1 screw adjusts both carbs.
     
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  6. Dooffle

    Dooffle New Member

    The pilot screw is also called the mixture screw, only sets the mixture at low revs.

    And yep the way to increase fueling higher up is to change the main jets. As long as you have the air flow/cylinder flow to go with it.
     
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  7. smudger

    smudger I Love SV650's

    4 screws for mixture and only 4 2 1 have butterfly adjusting screws to set butterfly 3 there was a long thing with a twist knob used that to adjust 3 first all back together then used the same knob I adjusted 3 with to lower the revs as carbs 1 2 and 4 were in sync with 3 so any adjustment on 3 would do exact same to 1 2 3

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  8. lee

    lee Moderator Staff Member

    Cheers doof.
    That makes sense to me.
    I've promised myself ill understand carbs one day.
     
  9. Chris6406

    Chris6406 New Member

    Has anyone seen the home made manometers on you tube simple to make

    "Making a $5 Carburetor Balancer" on YouTube
     
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  10. Chris6406

    Chris6406 New Member

    Made my own last night
     
  11. Chris6406

    Chris6406 New Member

    [​IMG]
     
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  12. Chris6406

    Chris6406 New Member

    Sync'd the carbs sounds and revs great came across another problem lol ive posted
     
  13. Chris6406

    Chris6406 New Member

  14. smudger

    smudger I Love SV650's

    Ok proper noob question if I try this method to sync my carbs on the nc31 were do i put them tubes as I'm sure they don't go on the fuel drains on the carbs and. Only 2 tubes going from ram air in carb and 2 petrol pipes going in

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  15. Chris6406

    Chris6406 New Member

    Correct me if im wrong but there should be a screw in each inlet (connects carb to engine ).
    on mine there was 1 screw on each of inlet i removed the screw on each 1 and screwed a welding tip (sold in halfords) into each 1 to be able to connect each hose onto
     
  16. Chris6406

    Chris6406 New Member

    Try to download a service manual for your bike where are you located
     
  17. lee

    lee Moderator Staff Member

    Iirc carb 1 has a plug you unscrew from the side, you need an m5 adaptor to fit your pipe onto, the others have a small black rubber cap at the base of each carb with a spring clip holding them in place. They are a bitch to get off, and will probably be perished and tear as you remove them.
     
  18. smudger

    smudger I Love SV650's

    Service manual only. Go's to 96 mines a f3 nc31 98

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  19. Chris6406

    Chris6406 New Member

    Chances are they might be in the same place as the older ines
     
  20. Chris6406

    Chris6406 New Member

    Any pics smudge
     

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