My 2002 suzuki intruder 1500vl is backfiring on the back cylnder y is that

SOURCE: backfiring and low compression in back cylinder

sounds if you have a burnt valve/s somewhere

SOURCE: a manual for my 2003 Intruder 1500VL

http://www.mambaville.com/ForumFAQ/LCService/Manual/manual-index.htm on line service manual

SOURCE: suzuki intruder 1998 rear cylnder spark plug

hi your carbs need rebuilt if you bought the bike with the cobra pipes on it an aftermarket jet kit has already been installed after time the aftermarket needles wear out and or wear out the emulsion tubes. i had the exact problem tried every thing coils, igniter box etc. check out GMAN INDUSTRIES. COM they will solve your problem. or sell you genuine mikuni parts with the correct jets, pilot screws, and needles.

SOURCE: My suzuki intruder is missing backfiring on the

Did you sync the two carbs? If not the rear may be getting all the gas from the rear carb and none to the front. Twist throttle engine off and see if front carb cable is pulling the carb open.
Also unscrew the spark plug boot from the front spark plug wire and trim 1/8th inch off the wire and screw the boot back in. The plug wire end may be corroded on that wire.

SOURCE: 2004 Suzuki VL1500 Intruder LC Motorcycle backfire

If they cant duplicate it your good.Usualy with backfiring i would make sure to eliminate any exhaust leaks. The dealer is inexperienced at solving compound problems,(sorry) not picking a fight, but sometimes cleaning is not goog enough,I went through this with a 1400 Intruder.several attempts were needed to get the two carbs level on the same line with each other.so the floats would work properly together,then set fuel flow and the air flow through the ventouri in the carbs.Also i had to make these adjustments while level (not on side stand) The floats were very sencitve to needle valve to seat adjustment(bent to open or close some of the flow)