I have a 2005 vtx 1300 and it really back fires alot. Is this a problem with the fuel or carberator

Clean the carb first, before start adjusting up & down!

You could have bad fuel.
You could have a plug wire bad or with water / condensation try removing wire and shooting a little w-d40 on it.

hi,sounds like you have a blocked main jet in one of the carbs,when the fuel sits in the bowls it will evaporate and leave behind a residue that is quite difficult to remove even with a carb cleaning compound,what i do in this case is remove the carbs,remove all the jets,place all the jets in a saucer or dish and fill with petrol,leave them for a few days,this will soften the residue,then use compressed air or a crc typecan with carb cleaner and force clean them by squirting the fluid through them,do not use(as some people do) a piece of wire to clean through them,this will scratch the inside of the jet and alter the fuel flow charicteristics of the jet and render it all but useless,once you have them all absolutely spotless,reassemble and put the carbs back in,just about put money on it that your problem will dissappear,hope this helps...cheers

Black smoke could be unburnt fuel .Check your air cleaner unit it may need a change .And also check that your plugs and you have a spark on all plugs .

That's most likely caused by the PAIR valve system. Read up on how to solve that on VTXCAFE.com. I did this on my 2007 VTX 1300C

a back fire is to much fuel going down the exhaust and igniting, if you changed the exhaust pipes or allterd the air cleaner you will need to get it set up on a dyno . the air flow meter could allso be playing up a dealer repair really.

Firstly, have you checked for spark?? Is there fuel to the carb?? Is the vacuum line to the fuel valve OK?? If the motor turns, then your kill switch is OK. Check the "basics" first then let us know what your results are and we can move forward

hi buddy on carb will be a screw turn this in till it stops back firing get back to me if it didnt work its the mixture screw below

20 nm on all of them this may not seem alot but the clamps bend over the forks and clamp onto them many thanks buddy

Since you removed all of the back pressure,You will need to have the carb and timing adjusted to match the new exhaust flow