One exhaust blows more smoke than other

[keane.tim]

I notice that the left hand side exhaust blows a bit more smoke that the right exhaust when he choke is pulled out (especially noticable of cold, damp days). There is only a minor appreciable difference in exhaust pressure (measured by holding hand cclose to exhaust !)

when I examined all the plugs at last service they were all fine...no carbon deposits etc.

any ideas on what could be causing this ?

Thanks

Tim

[tdeboeser]

EDIT: I shoulda looked at the forum section "ST1100 Tech", sry.

Choke? Must be a St1100 :). I have seen this on the my ST1300, and my old SuperHawk. On the SuperHawk ( a v-twin) the rear cylinder is slightly hotter, so it was normal. I don't worry about it, and I don't haven't seen any issues in performance.

Maybe someone more knowlegable will chime in.

Tom de

[Wahrsuul]

Just a guess here; if it's only on cold damp days, it may well be more water vapor than smoke. If it doesn't do it on warm days, then I wouldn't worry.

[saaz]

Probably just water vapour. I find that the build up of water vapour can vary between the pipes in terms of the drips from the drain holes.

[Simon Soh]

it happens to some of our Singapore owners as well, I didnt follow up with them for the outcome since after.

what I guess it could be the tiny hole under the exhaust being blocked with road grim/dirt causing it to have more 'smoke'.. :D try to remove it by gently scratching it untill u hear the hissling sound when ur finger is near.