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Posted on Sep 13, 2011
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My yamaha 80cc motorcycle runs fast then shuts down

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Francisco Padilha

Francisco Padilha

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  • Posted on Sep 13, 2011
Francisco Padilha
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Hi, if it starts again after a litle wile ,then you must have a petrol level inside the carburator tha is to low. in the fuel chamber you find a buoy that controls the amount of petrol coming into the carburator. If this level is to low you just run out of fuel after a fast ride.
Also you must check that your gas tank "breathes" so air can go in as fuel comes out, otherwise it will stop fuel from running due to a vacuum process.
Good luck

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  • Posted on Jul 03, 2015
Sam Brown
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Above answer is good, but just simple check if it has too much 'choke' as it would start fine when cold, but could cut out as engine reaches working temperature

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