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My 300ex hasn't run in a year i just purchased it from a family who barley used. it is backfiring very badly it has a white brothers exhaust on it also. do i just need to totally clean the carb and replace the gaskets from it sitting?
 

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clean the carb and rejet it
 

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You might not have to rejet. Just start by cleaning the carb. Make sure you have fresh gas and no clogged lines.
 

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true guys thx red and mud
 

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Removing the carb and cleaning it would be the first thing I'd do along with replacing the air filter. I agree with Red ^ rejetting won't be the issue chances are the carb is shelacked up from old fuel.
 

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300 could very well be correct about the jetting, but let's do one step at a time... Great advise 300!!!

300, that is why we have multiple people answering, you gave correct info and the other team members narrowed it down!
 

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true that i just though new pipe on it the jetting or the carb could be dirty but my bike backfired when we put my pipe on it and when we rejetted it it did not so u never know
 

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That's true^^^ but i think the exaust was already on it , the quad had just been sitting for a while. Old fuel will do that too especially if it has moisture in it.
But a very good and valid asumption 300.
 

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yah i know and its just prolly gas build up in the carb he should clean the carb in kim dip and clean out his jets
 
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