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kellett1234

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Jun 7, 2011
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I have a thumpstar 150cc lifan engine , having trouble with it can anybody help . starts fine , idles good , and when u start riding it starts jerking , it has a new spark plug , ive stripped the carbie down and cleaned it , its still doing the same thing , the carbie is a 26mm oko.
thanks
 
has the carb always been on there?

if so then take a look at your cdi unit.. if it has an inner rotor kit than ya can bet thats your issue..

also confirm your jets sizes and needle position..
 
Look at any connecting wire near or under the seat. Make sure they are not lose And nice And tight.

This happen to me And as soon as I sat on the bike my seat would rub against the joining part of 2 wires forcing them apart and shorting out..
 
Look at any connecting wire near or under the seat. Make sure they are not lose And nice And tight.

This happen to me And as soon as I sat on the bike my seat would rub against the joining part of 2 wires forcing them apart and shorting out..
 

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