Black smoke upon shutting EVO off?
#1
Black smoke upon shutting EVO off?
Took my 99 evo Springer for a ride earlier, let the bike warm up, and upon returning home I noticed when I shut the bike off in the garage some black smoke coming out of my python3 pipes, fired it righ back up and got 2-3 puffs of black smoke and it went away right away, fired it up about a hour later with zero black smoke nor zero issues, anyone ever have this? Or am I over worrying thanks
Last edited by hardcandydyna; 02-12-2018 at 06:21 PM. Reason: Misspelled words
#2
#4
#5
hummm, last dec and not ridden much??
although it may happen, you find the plugs showing excess fuel, never say never, because:
up at highway speeds, fuel demand might exceed fuel leakage rate so the plugs might show normal. however, when you run under leakage rate demand, the fuel will build in the bowl. also factor in that plugs will show diff color according to riding style as engines are not as efficient at low speeds. it could be a fluke or trash in the needle/seat, maybe a loose jet or any other number of things. one thing for sure is excess fuel will wash the oil off the cyl walls and that leads to accelerated wear. such a small thing to check the carb, but it is your machine.
although it may happen, you find the plugs showing excess fuel, never say never, because:
up at highway speeds, fuel demand might exceed fuel leakage rate so the plugs might show normal. however, when you run under leakage rate demand, the fuel will build in the bowl. also factor in that plugs will show diff color according to riding style as engines are not as efficient at low speeds. it could be a fluke or trash in the needle/seat, maybe a loose jet or any other number of things. one thing for sure is excess fuel will wash the oil off the cyl walls and that leads to accelerated wear. such a small thing to check the carb, but it is your machine.
#6
I pulled out the paper work from the org owner and it seems when they rebuilt the carb a 45 pilot jet was installed, bike has python pipes and a screamin eagle air cleaner, the bike sat from 2013-2017 and the work was performed when the org owner decided to get the bike up and running again, when parked it didn’t have any issues but I’m gonna remove the carb and go over it all again, they may have the wrong main jet
#7
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#8
I honestly think it’s a clogged petcock, it shut off suddenly, I changed to reserve and it fired up with out issue. Bike started to have a miss or hesistation when the throttle was cracked but cleared up in higher RPM, bike doesn’t smoke upon shutting off or back fire anymore, it did sit forwhile so bad gas could be a problem to
#9
I honestly think it’s a clogged petcock, it shut off suddenly, I changed to reserve and it fired up with out issue. Bike started to have a miss or hesistation when the throttle was cracked but cleared up in higher RPM, bike doesn’t smoke upon shutting off or back fire anymore, it did sit forwhile so bad gas could be a problem to
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