bit of smoke when "really going for it"

[gcpeters]

Hello

whilst having an "enthusiastic" drive the other day I noticed that if I changed gear high up the rev range 6.5k to 7k then a bit of smoke would come out the exhausts ! it wasn't blue, or white, more kind of black I guess. this doesn't happen all the time, infact its the first ive ever noticed it!

The cars just been serviced and is making awesome power as it only had its rebuild a few years ago, im guessing this is just un burnt fuel? anyone else noticed this? the car is decated also

cheers!

GP

[bobbins]

Black smoke would indicate unburnt fuel - particularly if you noticed it in the lights of the car you'd overtaken. Wouldn't fret too much, I've seen it with several of my previous cars at high revs, though not the Cerb.