The 2005-2007 750 carbs by Kehin are all identical. Back firing on decel usually happens when a carb is either running too lean, or the leaning is coming from a split in a carb boot...which is very common on all those years. They usually split at or under the head-side clamp where you can't see it. Of course the leaning can also come from a leaky air box cover gasket, too small of a jets, blocked pilot or slow circuit, low float levels, very warn butterfly shafts, burned valve seats, mis-adjusted valves and a few other things.Hi,
I am looking for any details on the differences between the 2005 and 2007 carbs. Is there a different Pilot circuit to prevent back fire on decel on the 07?