2002 Ducati Monster S4 "black smoke motorcycle exhaust loss" Questions

black smoke coming out during the dyno for a second, but I saw this on about 10 of the other 25 bikes tested. Any thoughts or ideas are very much appreciated,Dyno's are not zero'd out across the board

...black smoke and constant misfire since topping up with engine oil. there is a total loss of power. black smoke in abundance from exhaust and a continuous misfire, but the misfire was evident before ...

...black. Blue smoke seen from exhaust. No nasty noises otherwise. Excessive oil consumption - no apparent leaks - Is this piston rings or pistons and rings?? Is it worth replacing just the rings?? How ...

...smoke thicker and a dark grey/black colour? Is yours the Twin Carb setup? The carbs might be out of balance and one is running richer than the other. When the engine is cold, you could remove and ...

...black smoke under full acceleration.the engine wants to die when slowing down after running at speed for a short time. Make sure the air filter is clean and not oil soaked. Also be sure there's ...

...black smoke out the exhaust and I can smell fuel.. sometimes while riding it will misfire then the idling will skyrocket until I shut the bike off and restart it. it has a power commander on it and ...

...black smoke out the exhaust pipe. Also has a tough time taking off from stop lights after a good run on the freeway Black smoke is a sign that the engine is running rich. It is getting too much fuel ...