Honda-SOHC

SOHC.co.uk Forums => CB650 => Topic started by: judodave on March 13, 2013, 12:22:33 PM

Title: White smoke from cb650z
Post by: judodave on March 13, 2013, 12:22:33 PM

Just took my bike out today for an hours run and noticed white smoke coming from the exhaust pipe when I got back home. Has fresh petrol in and bike ran fine, opened it up to about 90mph , any thoughts.

Title: Re: White smoke from cb650z
Post by: Rozabikes Tim on March 13, 2013, 02:50:29 PM

Does it mean they have selected a new Pope???

Title: Re: White smoke from cb650z
Post by: mick on March 13, 2013, 03:06:42 PM

Hot exhaust air into cold air ? don't think its anything to worry about  ;) cheers Mick.

Title: Re: White smoke from cb650z
Post by: SteveD CB500K0 on March 13, 2013, 06:25:26 PM

Normally:
Black smoke = running rich
Blue smoke = burning oil
White smoke = water vapour

Not sure why you'd see white smoke after an hours ride?


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Title: Re: White smoke from cb650z
Post by: judodave on March 13, 2013, 08:58:47 PM

First time its been ridden in about four months, hope its just water vapour or selection of the new Pope.

Title: Re: White smoke from cb650z
Post by: ST1100 on March 13, 2013, 10:24:07 PM

Quote from: judodave on March 13, 2013, 12:22:33 PM

...opened it up to about 90mph...

...jet trail?  ;)

Seriously: what air temps and humidity were present? Could it have been cold humid air creating condensate with the warm exhaust gases?
Or you had the bike only operated for a short time on a prior run, leaving a noticeable amount of dew in the silencers?
Fuel quality/water contend could as well be a factor.
(the cans of my 1100cc rig actually have drainage bores, dripping water out while warming up...)

Title: Re: White smoke from cb650z
Post by: judodave on March 14, 2013, 01:36:30 PM

I'm sure your right, I have not ridden the bike for months and hopefully its condensation in the exhaust pipe.