Mine was sputtering and backfiring. Kept acting up. My light was bright then kinda flicker or dim a little. I took it to my mechanic and they found the red battery cable at the terminal broken. It was killing the motor and then gaining power really quickly mimicking a fuel problem. My plugs were black too… I got my bike back and it definitely rides better and no more issues. I definitely would have changed everything but the power cable.
@@makemoneyrelax I have used it for years on old boat motors that had carburetor issues from sitting with old gas and it cleans the old varnish off the carbs and works amazing at getting carbon build up off the pistons and keeps fuel injectors clean on both my Harleys. Look up videos on Seafoam on RU-vid. It's good stuff.
@@makemoneyrelax Stabil is good for long term fuel storage. Seafoam is also a fuel stabilizer AND fuel system cleaner. Try a can. Read the instructions for the right fuel mixture. But it sure cleans up your fuel system and cleans carbon deposits on valves and pistons too.
Its funny how one issue can have so many possibilities. Everyone has tried somwthing different to fix their problem. It makes it impossible to narrow down a fix. You tube needs to make the posters comment sit at the top so people can say what fix they tried and worked. This will halp people have a starting point.
Test ignition. Mine did the same, and after 35 km it would cut out and backfire wirh little acceleration. All black sparkplugs. Believe it to be a faulty ignition modul. Only shows when hot (first time)
My 1999 sportster 1200 custom has same spark problem from fuel running too rich, got a carb clean and rebuild and now getting new plugs cause it’s still misfiring a little during acceleration. Both plugs are black and ones kinda cracked so expecting that’s what’s causing my misfire problem
I have 2015 harley street 750 that's sputtering. They recalled the fuel pump in 2015. I replaced plugs air filter fuel pump and fuel line. Harley doesn't see a fuel pressure regulator in there parts book. Injectors ill change next. I'm also seeing oil in the air filter wonder if that's contributing... any ideas?
Firing on oil . Or burning too rich EFI module . Or wrong EFI module for exhaust or hopefully the plug just failed to fire that's possible to get a junk plug straight out of a new box . Or bad wire from coil . Actually got all that backwards just woke up .
@Nico Cooper Adding an air cleaner or pipes only makes engines run leaner. Sorry but that would be a lean situation. He has oil blow by or a carb way out of wack or both.
no they were totally fouled.....now the new sprkplugs have been running for 2 years with no problem...is it the oil that i got from that botch rapaiur service guy...could that foul the plugs?
because the program in the circuit is not correct for the idle jet system the idle jet loads up fouling the plugs out and then when you give it gas in your primary opens up it clears everything out. On a carburetor you would have just changed your idle jet your pilot jet. Due to it being injected you have to change programs.
Sorry my 1st comment was during the video. At the end i saw your pipes and filter. Both aftermarket. You need to look into buying a fuelpak to electronically tune your bike. Those straight pipes you have on there have no baffles and thus not enough back pressure to my understanding.
@@Dondilly92 I just bought a Power Vision for my 2002 Road King Screamin Eagle and there are no TUNES available, the ones listed give errors on the PV and nothing works, Auto Tune requires O2 sensors, which my bike does not have, nearly every function returns an error. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Zl2NAl-_FhM.html
@@Dondilly92 I have power commander V and i talked with company who made it and they sa nothing is wrong with it, it works fine....that I should check the valves etc....rings etc
100 to one he put pipes and air cleaner on with out putting tune on bike so now it’s running lean…. See this all time at my shop guys put parts on bike but don’t tune or rejet… need to let real mechanic work on bike….
Running way to rich... too much fuel. Need to tune your bike. If you added new pipes and air filter but didnt tune your bike thats the issue. Your bike looks new enough that you can do it electronically yourself. I honestly have heard you can plug a wire from your bike to your computer or phone and tune it with some sort of program or app... ive never owned a bike newer than a 2003 myself, my wifes 2015 was already tuned to her after market parts. But ive heard thats how its done now. My older bikes need to be manually and mechanically tuned when adding pipes and filters.
