Question about 2005 Hyosung GT 650

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Backfiring when throttling back or on over-run downhill

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Hi,this is quite common on big v-twins,it is normally caused by a leak in the exhaust system(gaskets or clamps)this allows air to enter the exhaust system which then leans out the mixture inside the pipe,when the next hot exhaust pulse arrives from the cylinder,the lean mixture inside the pipe is ignited causing a backfire,check all the exhaust joints and the manifolds,where the pipe exits the cylinder,and make sure they are all tight and leak free,your problem should then go away,but in saying that,you will always get some exhaust popping on most v-twins,hope this helps

Posted on Feb 06, 2010

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