Question about 2010 Sym Mio 50

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Sym mio 50 is starting then cutting out for about ten minutes then when warm it runs fine I have replaced the carb this has not made any difference please help

Have also tried the carb heater that's no good ether

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Definetly an air leak, I believe what is happening is where the inlet manifold joins the cylinder it has a poor joint which when cold is contracted and when engine heats up the joint expands with the heat,sealing the leak, ie causing the fuel/air mixture to become rich enough for scoot to run.

Posted on Mar 13, 2017


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Posted on Jan 02, 2017

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SOURCE: My sym mio 50 keeps cutting out there is fuel getting through to a new carb if I run it off a different fuel sauce it runs fine help please

Fuel tank breather could be blocked or the filter on the fuel tap.

Posted on Apr 21, 2015

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Hi, Aaron the answer to all these questions is way above my pay grade for this situation, I would call or visit my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
SYM Jet Sport S50 Service Manual
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SYM Jet Sportx 50
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Btw, I’m available to help over the phone in case u need at

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