Backfiring on kawasaki bruteforce 750 atv

Question edited for FULL 'make model (what it is)', from 'banshee'.
Question moved from Motorcycles to correct Category.

Check spark plugs.
Clean Carb.
Check timing.

More here, it is a known issue.

https://www.google.com/search?q=Yamaha+banshee+atv+backfires

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backfiring is usually a sign of an air leak in the intake manifold

Problem with Brute Force, please save my 4-wheeler from shop ...

www.kawieriders.com > ... > Kawasaki Brute Force/Prairie/Bayou

Nov 16, 2011 - Problem with Brute Force, please save my 4-wheeler from shop! ....2007 kawasaki 750 4 wheeler backfire problem ... should I save for my brute force 750? moe, Kawasaki Brute Force/Prairie/Bayou, 3, 10-18-2010 06:55 PM. Backfire thru exhaust
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Brute force backfire problem - YouTube

? 1:06
www.youtube.com/watch?v=VFxGBYoVFqk
May 5, 2013 - Uploaded by gubba1957
I bought this 2006 750 it had a backfire problem when I bought it so I cleaned ... 2005 Kawasaki Brute Force 750 - Stock Exhaust Modification ...

Two things, not enough gas coming through the carberater or a vacuum leak

sounds like you for a fuel problem like floosing crankcase with fuel, is it FI or carb

If you need further help, reach me via phone at https://www.6ya.com/expert/allen_b068623c5003aa4b

Check to make sure your intake valves are seating good. The carb that keeps popping is the one i would start with. If the valves are not seating they need to be adjusted. If adjusting doesnt fix it replace the valves before they snap off and fall on top of the piston

Your bike's engine is back firing ..this could be because of low level of fuel in the float chamber.
If you have cleaned the carbs , please recheck and reset the float chamber level.
Secondly both of the carburators have to work exactly at the same time..if they dont it will also kinda back fire and have uneven idling...check this too.
As for the air mixture screw .. once all is fine ....tighten the screw slowly all the way in to the last thn unscrew about 2 and half to 3 turns outwards .....you will notice the improvement of the idling.... its adivseable to check the valve clearance and reset them to specs.
Hope this helps!

Your jetting on the carbs are wrong.

if you want more info on the jetting and how to do it along with some GREAT info, check out highlifter.com/forum