Question about 2002 Husqvarna SM 570 R

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Cough and splutter on hard acceleration?

I have a 570 smr, had it only 3 weeks, when i first had it and accelerated, it was off like a rocket, then i ran out o petrol a week after and since then i have had a problem with hard acceleration 80% o the time, it slutters an judders like you are not gettin enough petrol through maybe? any ideas or solutions? thinking iv maybe dragged something through from petrol tank an bloked the carb but not sure.

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  • chris_sgetc Feb 22, 2009

    I cleaned the spark plug up early today and it was alot better it was only doing it in 5th and 6th so will replace that and clean the carb and i think that will do it, thanks

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Yeah,It sounds like you just need to clean the carb jets.

Posted on Feb 22, 2009

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1 Answer

How con I cure the coughing and spluttering ?


Hi, Mick if you think the bike may have been sitting for a long period of time you may want to remove the carburetor and do a proper cleaning, popping or backfiring on deceleration is usually caused by a lean fuel condition or an air leak in the exhaust system and is generally located where black carbon soot is seen as a flashing build up from any joint connection. This condition can easily be remedied by removing and cleaning both joint pieces and reassembling with high temp silicone and torquing the exhaust clamp to the proper spec. Coughing is usually caused by an air leak in the intake system and will generally have the same telltale signs, a wet or damp buildup of oil/gas seepage at the intake manifold to cylinder head or carburetor to intake manifold connection and in rare instances a worn throttle plate shaft and or seals. Spitting is usually caused by a faulty accelerator pump and or nozzle, or the float bowl needle and seat leaking and overflowing through the main jet mixing well nozzle, or the air-fuel mixture screw is adjusted too lean. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below and for specific information or questions, please feel free to contact me at xlch@mail.com. Good luck and have a nice day.
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Hi Anonymous, if you have a carbuerator the usual suspects are:
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Hi, Andre popping on deceleration is usually caused by an air leak in the exhaust system and is generally located where black carbon soot is seen as a flashing build up from any joint connection. This condition can easily be remedied by removing and cleaning both joint pieces and reassembling with high temp silicone and the correct torque applied to the exhaust clamps where present. Coughing is usually caused by an air leak in the intake system and will generally have the same telltale signs of location by a wet or damp buildup of oil/gas seepage at the intake manifold to cylinder head or carburetor connection and in rare instances a worn throttle plate shaft and or seals. Spitting is usually caused by a faulty accelerator pump and or nozzle, or the float bowl needle and seat leaking and overflowing through the main jet mixing well nozzle, or the air-fuel mixture screw set to lean. For more information about your issue and valuable "FREE" downloads that you need please visit the websites below. Good luck and have a nice day. Scooter hiccups and sputters Provoscooter com Forums

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Hi, Anonymous and the usual suspects are:
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