back fireing

[gunshipj145]

i have a 2005 s2r dark 803 ive had it for about 2 months it had 1400mi on it when i got it now im at 3300 it sat for its whole life things that i have done to it are new aftermarket plugs duble ester oil 15w-50 4t for wet clutches aftermarket mid pipes and slip on carbon pipes k&n air filter and oil filter i tiped up the tank today to put on my red leds on the frame it still ran fine all day untill my ride home tonight now its idleing at about 800 to 500 rpms and back fires and putters in 1st and 2cd after that it gets alittle choppy but gets alittle better i still can open it up and she gose with the backfire happaning not as much in the higher gears could this be a plug or the fule filter i have been useing the lucus fule system cleaner for the past 4 tanks about 2.5oz for each tank and messed up the last tank with 5oz of cleaner can any one help me out with some info plz this is my 1st bike and i have no clue lol

[Slide Panda]

Holy lack of punctuation... that was hard to read.

First guess is that when you put the tank back down you pinched one of the breather hoses. Check there first.

[gunshipj145]

no hoses were pinched just checked .

[dark_duc]

Holy lack of punctuation... that was hard to read.

LOL

My guess would be that the bike is rejecting the LED's.   

Seriously though, I would check the condition of the plugs and run some fresh fuel through it next.

Good luck

[NorDog]

Punctuation is your friend.  It is the gateway to sentence structure.