Re: [ST] Smoking exhaust

["David Jonas" <kahonas@xxxxxxxxx>]

Well, since there were no replies to this yet...

I can't say I've had this problem (knocks on wood) but how much of an
altitude change are we talking?  The reason I ask is because for the last 5
years or so of my bike's life it's been at pretty close to sea-level.  When
I get out of Alabama back to Tennessee, there are a heck of a lot more
mountains, and I'll be living on one of them.  Should I be anticipating a
possible problem?

David


On 6/5/06, Gavin Foster <gavfos@xxxxxxxxxxxx> wrote:
>
> Hi all,
>
> At 18 000 km my '03 Sprint RS suddenly started smoking at idle after
> running for a minute or two. That got worse, and the engine was eventually
> opened (under warranty). The agent found that the rings were totally
> knackered. Replaced them and all was fine. Nobody could explain why they
> should have been worn so badly. I'm 51 and ride hard, but I'm not a doughnut
> or wheelie king etc. .
>
> While I was running the bike in when it was new I found that every time I
> travelled away from the coast the bike would start missing and spluttering
> at the same point on the freeway.  After having injectors cleaned, etc, I
> deduced that it must be an altitude problem. Turned out that I was right -
> there was a black-box problem, and after it was replaced under warranty
> everything was fine - until the smoking started at 18 000 km. My theory is
> that the engine was overfueling and washing the oil from the bores while I
> was running the bike in, hence the unexplained ring wear.
>
> About 2000 km after the ring job, I started the bike and let it idle while
> I fetched my gloves from inside the house. When I got back I was met by the
> sight of clouds of smoke pumping out of the exhaust. My local agent, who's
> also a good friend, reckons that there's an oil seal inside the left hand
> casing that may leak oil into the casing when the bike's on the side stand,
> and the oil is then sucked up into the airbox and pumped through the engine
> to cause the smoking.
>
> The problem then disappeared for about 2 000 km, but last Sunday came back
> with a vengeance. I rode about 150 km after that, with no more smoking after
> the first 2 or 3 km. Idles now, no muss, no fuss.
>
> Has anybody else experienced anything like this?
>
> Cheers,
>
> Gavin Foster
> Durban, South Africa.
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