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My Fazer lately has started to backfire when cold in the morning. Not always but sometimes. Can't sneak out for a blast the missus will hear me see the major problem here :lol:

Do I need to do some servicing? I mean to the bike not to the missus :D

It has new Iridium spark plugs.

I have the feeling all started after I have changed my old air filter with new K&N.

Any ideas?

Edited by Valko
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the k&n problems shows up again a lot of people have had problems with them in mid range cc bikes for some reason the bikes dont like them if you have still got the standard filter put that back in and see if the problem goes away,as the k&n is more free flowing with air you might need a air correcter kit in the carbs increasing the amount of fuel and reducing the air in

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