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2017 fc450 backfire

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Just bought a brand new 17 fc450. It has about 4 hours on it and it backfires when I'm letting off the gas.. don't know if this is normal or not none of my previous 4 strokes have done this

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10 hours ago, Smmansfield7 said:

 

Just bought a brand new 17 fc450. It has about 4 hours on it and it backfires when I'm letting off the gas.. don't know if this is normal or not none of my previous 4 strokes have done this

 

I have about 20 hours on mine with no back firing.  There are bikes were this is common, fairly common on some of the KX 450s, but yours is the first complaint I have heard of for the Husky/KTM.  

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It's just a little lean. Maybe turn up the idle slightly? Worth a try

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