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Thread: Aprilia rx50 2004 dies after 5 minutes

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  1.  
    #11
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    Forrest area. The bike has worked. But recently seems to be failing.
     
     

  2.  
    #12
    Active Member napalm's Avatar
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    Not sure if it's cold enough but could it be Carb freezing?
     
     

  3.  
    #13
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    Quote Originally Posted by napalm View Post
    Not sure if it's cold enough but could it be Carb freezing?
    It was close to 0° last night. But I'd thought after 10 to 20 would have started again?
    It is a water cooled engine, so keeps heat for a while.
    Will see if it starts this morning.
     
     

  4.  
    #14
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    Quote Originally Posted by Hondafan View Post
    That doesn't make things easy.

    What carb is it?
    Is the jetting right?
    Think it's a Dellorto PHBG21
    What symptoms should we expect if the jetting is wrong?
    Tick over seems fine.
    It seems to rev fine.

    We know the carb and exhaust has been changed, but no details to what they are exactly.
    Last edited by paddee; 12-01-14 at 12:38 PM.
     
     

  5.  
    #15
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    right carb? jetted for new exhaust??
     
     

  6.  
    #16
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    I've no idea what size jets we require for filter or exhaust, when the bike is running, it seems to be running fine.
    Just tried bike, numerous times, kick start and bump start, nothing! I can hear it sucking air through intake.
    Have managed to remove card from manifold, there is fuel in float chamber. but it's not so clear. Quite grey to black.
    So, thinking, maybe too much 2T oil getting in there, not sure what stage the oil is mixed into petrol.
    Petrol from tank looks clean, but could be getting mixed up, and some 'sludge' from bottom of tank getting into carb.
    Or the reeds are failing, and we have oil/petrol mixture coming back into card some how.
    Of course, I'm still open to suggestions.
     
     

  7.  
    #17
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    Installed carb.
    pipes moved to see text.
    Card is now off.
    Attached Images
    Last edited by paddee; 12-01-14 at 05:10 PM.
     
     

  8.  
    #18
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    update,
    Near emptied fuel tank, it looks clear, even shook tank while emptying.
    thought I'd check the 'jets' looks like the middle jet was blocked! I didn't clean this one yesterday. (don't know why I didn't bother with this one)
    I've just cleaned all jets and put it all back together, it started, instantly.
    Just need to know where the dirt is coming from.
    Son is off to refuel now, hope he gets there n back.
     
     

  9.  
    #19
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    where does he get fuel from?
    you could try changing fuel pipes as big problem with ethanol eating rubber pipes.
     
     

  10.  
    #20
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    Last edited by wheelers; 12-01-14 at 06:38 PM.
     
     

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