Why's it running so bad?

Discussion in 'The Workshop' started by Ro8bieg, Jan 14, 2009.

  1. Ro8bieg

    Ro8bieg New Member

    Messages:
    100
    I've just had a polini sport kit fitted and it has an 88 jet in but its running shit.

    It runs okay for about 2-3 minutes then slowly starts to loose power then cuts out. Then I have to wait for about 5 minutes until I can start it again, it just keeps doing this.

    Anyone got any ideas of what it could be?

    Thanks, Robbie
     
  2. Mehmet

    Mehmet Active Member

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    Compression loss :confused:

    Jet size is toooo big tho

    Guessing its on a aerox?
     
  3. alperin

    alperin Active Member

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    1,621
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    aerox 180cc
    ne alakaa?
     
  4. Mehmet

    Mehmet Active Member

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    Because i can remember this guy showing pictures of his bike and as much as i can remeber its a black aerox.

    THATS WHATS HOOD
     
  5. Ro8bieg

    Ro8bieg New Member

    Messages:
    100
    nah was close tho, its a red aerox :p

    The spec is:
    Polini sport 70
    Leo vince tt
    Polini reeds
    Polini speed control variator kit
    88 jet
    Snorkel removed from airbox

    Just been to kickstart in blackpool and they seem to think its either starting to sieze or thers just a fuel blockage some were.
    They seem to think its using the fuel in the float then when it stops after about 5 mins or so it fills back up then its set to go again for another 5?
     
  6. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    et2 monster
    well do yourself a fav and just dont go back there... check all your pipes are on, the coolant is blead, there are no loose fitting bits, obvious air leeks.. check the choke., set the carb up correctly
     
  7. Jamie

    Jamie Active Member

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    5,370
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    xt660x, 200sx s14a
    I know minor probabally wont agree. but if it was me id strip it all completely, RE_DO it all checking gaskets seals etc...plus you get a look at the piston/barrell for any damage...research and work out exactly what the jet size should be, get that size plus 2 above and 2 under

    ive always found starting again is longer but always works.
     
  8. Jamie

    Jamie Active Member

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    5,370
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    xt660x, 200sx s14a
    oh and my bad. check ALL the carb settings, idle mix, etc, check transmission for anything suspicious, broken springs yadayada

    if something goes wrong after fitting a new topend. its best to check EVERYTHING
     
  9. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

    Messages:
    14,276
    Rides:
    et2 monster
    if you fitted it yourself do as james said, start again... if somohne elkse did it, take it back
     
  10. Blue dwarf

    Blue dwarf New Member

    Messages:
    342
    A theory:

    It`s jetted too weak, runs fine when the auto choke is on..engine warms up the auto choke turns off and it dies...cools down the choke switches on and it`ll run again.

    Just a theory :)

    Oh float height on std carbs is non-adjustable unless you change the float wieght so bowl draining is un-likely.
    Tank venting could be an issue..drill a hole in your filler cap :)
     

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