BIT of carb setup help needed

Discussion in 'The Workshop' started by rider4life, Jun 10, 2008.

  1. rider4life

    rider4life New Member

    Messages:
    288
    right went for the startup today on the 172 after rebuild, it starts, idles and revs really well when chokes on. (phbl 25mm carb), but when i take choke off the bike just bogs down and dies, even if i rev it. i will find out what jets i got in there tomorrow but does any1 kno what it could be.
     
  2. kyle1b1

    kyle1b1 New Member

    Messages:
    5,191
    is obviously too lean :msn1:
     
  3. shiny red

    shiny red New Member

    Messages:
    1,224
    read minors carb tuning guide start from scratch and be patient with it?drop the circlip on the needle to the top or first slot from the blunt end and go from there?
    so satisfying when you get it just right(or what you think is just right) :D
     
  4. rider4life

    rider4life New Member

    Messages:
    288
    [​IMG]

    first off what are 1 . 2 and 3 .

    it says 60 on the side of number one

    50 on the top of number two

    and aq266 on the side of number 3.

    the slide pin is on the bottom 4th notch.

    The bike kickstarts first time without choke and runs really lumpy. it revs fine but when i ride it hasent got no pull really. when i had this carb on my old 172 it felt the same and when i put standard carb on the bike was flying.
     
  5. Martin

    Martin New Member

    Messages:
    565
    you really shouldnt of changed the carb youself if you dont know what each of those are (not being harsh)

    hope you get it sorted, read the guide!
     
  6. rider4life

    rider4life New Member

    Messages:
    288
    i can do it with sum guidence, ive never been a carb person. can rebuild engines all day long.
     
  7. jj180

    jj180 Active Member

    Messages:
    2,250
    Rides:
    Mrt 183/Vespa 300
    hes alright hes not thik ave a look at his project ffs, lol anyway need to sort out main jets, get a 98 to say a 108 and worst ways ill coem help you.
     
  8. kyle1b1

    kyle1b1 New Member

    Messages:
    5,191
    no need to touch those.

    like i said its too lean :msn1:

    if it bogs from idle when you rev richin idle mix if it bogs middle throttle drop the needle or if it is full main jet needs higthing.

    like i said is lean,
     
  9. Martin

    Martin New Member

    Messages:
    565
    my bad, thought you were another random guy without a clue asking about jetting :w00t:

    seem to be alot of those.
     
  10. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

    Messages:
    14,276
    Rides:
    et2 monster
    how hard is it to google "dellorto" first couple links will find you an itemised breakdown of the carb and its parts.
     
  11. rider4life

    rider4life New Member

    Messages:
    288
    thanks for ur help minor as always ;)
     
  12. rider4life

    rider4life New Member

    Messages:
    288
    its got a 120 main jet. u think thats to big
     

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