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Exhaust condensation

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Nurse Julie:
Hi Chaps

Just started bike up and there is small puddle of sooty/ watery condensation on the floor under where down pipe No.1 joins the collector box. This wasn't there before I started it up from cold but noticed it the other day also when starting up. Last time I took it out I did about 100 miles and thought that would be plenty of miles to burn off any condensation in the pipes.I have had a quick feel along the collector box and the silencer and cannot find any drain holes so I'm assuming the water collects as bike is cooling down and can't find it's way out till I start her up again. Should there be a drain hole somewhere and why didn't this happen last year ?. I had system off over the winter and other than fitting new exhaust packing between 1 and 3 and the collector to the silencer, nothing has changed. Any ideas?

Ta in advance
Julie x

Nurse Julie:
It is definately sooty water, not oil or fuel

tom400f:
Hi Julie

I know your silencer is a pattern one but may be they replicated the pinhole just behind the collector joint on the silencer itself. There is no drain orifice in the collector or the downpipes.

After a run I wouldn't expect any water to be in the system. It is hot and there is no combustion so no water vapour. When you start from cold though, of course the water vapour condenses in the cold exhaust system giving the white puffs and doubtless some puddles from that pinhole. It's tiny but it's there (on OEM units anyway). Make any sense at all?

tom400f:
... though looking at your pic may be your downpipe joints are blowing...

Tiny Tim:
The motad on my 550 does the same thing until it's warmed up. The leak appears to come from where the down pipes slide into the exhaust itself.

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