Smoke from under bike after ride in rain?

Started by Mike Qube, August 24, 2009, 05:48:29 PM

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Mike Qube

This morning when I started my M750 up, I noticed smoke coming from the bottom of the engine. It smoked for about 10-20 seconds then went away. There was no oil on the ground or anything that dripped from the bike.
The only thing I can think of is that I rode in the rain yesterday and maybe it could be oil and other crap from the wet road that got splashed up. Is this possible/normal? I didn't notice any smoke when I left work this afternoon.

CMDRDAVE

Probably the exhaust pipe was just wet still.  Keep an eye out if you are worried, but it shouldn't be a problem.  Several times I have had to leave my 748 with wrapped exhaust out in the rain.  When  I start it up and it warms up, smoke (vapor) starts absolutely rolling off of it.  I have even had someone come running over to tell me it was on fire while I was sitting on it.
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Raux

yeah water gets in all sorts of strange places. then when you put it on the kickstand it pools... then when you upright it and start it.. it runs off and turns to vapor on the hot engine/pipes. had it all the time.

Mike Qube

No smoke this morning, so things are looking good again!

Mike Qube

well. smoke again this morning. I put it up on the rear stand so I could get a better look under there, it looks like there's a buildup of grease near the front sprocket and when it heats up a it drips a little on the exhaust. Is there anything up that way that could be leaking, or is this more likely from not cleaning and lubing my chain properly?

Raux

you might want to get in there and clean out the buildup of chain lube.

i used a rag, no water, and some chain cleaner.

CMDRDAVE

Quote from: Mike Qube on August 28, 2009, 06:12:28 AM
well. smoke again this morning. I put it up on the rear stand so I could get a better look under there, it looks like there's a buildup of grease near the front sprocket and when it heats up a it drips a little on the exhaust. Is there anything up that way that could be leaking, or is this more likely from not cleaning and lubing my chain properly?

The grease that is building up is likely chain lube that flings off and collects there.  I would scrape out as much as you can and clean off the rest with chain cleaner or WD-40.  It doesn't have to be perfectly clean.  That should solve your problem. 
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Mike Qube

Quote from: XJDAVE on August 28, 2009, 05:05:52 PM
The grease that is building up is likely chain lube that flings off and collects there.  I would scrape out as much as you can and clean off the rest with chain cleaner or WD-40.  It doesn't have to be perfectly clean.  That should solve your problem. 

I took the sprocket cover off today and was scooping out grease with my fingers, I cleaned that all up, cleaned the bottom where it was dripping and where it was flung. I'm glad I did this before a chunk of this crap flung on my tire or something.

ducpainter

Quote from: Mike Qube on August 28, 2009, 06:12:28 AM
well. smoke again this morning. I put it up on the rear stand so I could get a better look under there, it looks like there's a buildup of grease near the front sprocket and when it heats up a it drips a little on the exhaust. Is there anything up that way that could be leaking, or is this more likely from not cleaning and lubing my chain properly?
I bet your clutch slave is leaking.

That area of the cases doesn't get hot enough to make chain lube drip.
"Once you accept that a child on the autistic spectrum experiences the world in
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    is even more amazing than yours."
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Mike Qube

Quote from: ducpainter on August 29, 2009, 03:32:07 AM
I bet your clutch slave is leaking.

That area of the cases doesn't get hot enough to make chain lube drip.
what should I look for to make sure that isn't it? I don't see any spots or anything on the floor of my shed.

red baron

Is the resivoir full?

Is it "using" and clutch fluid?

If not then you should be good.
"I believe there are more instances of the abridgment of freedom of the people by gradual and silent encroachments of those in power than by violent and sudden usurpations... James Madison

ducpainter

Quote from: Mike Qube on August 29, 2009, 06:23:49 AM
what should I look for to make sure that isn't it? I don't see any spots or anything on the floor of my shed.
Quote from: trouble on August 29, 2009, 07:14:39 AM
Is the resivoir full?

Is it "using" and clutch fluid?

If not then you should be good.
+1

Check the fluid level.

If the rubber bellows that is part of the gasket is extended you're leaking fluid.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."



Mike Qube

#12
Quote from: ducpainter on August 29, 2009, 07:26:49 AM
+1

Check the fluid level.

If the rubber bellows that is part of the gasket is extended you're leaking fluid.

The fluid was a little low. When I opened it, the level was at the bottom of the window. Is it supposed to be at the window level when the cap is in of off? It seems there is a rubber thing on the inside of the cap that might displace the fluid when it's on.
This might sound like a stupid question, I'm new just starting to learn all this stuff, but where is the bellows that is part of the gasket? Is the on the cap or elsewhere on the bike.

Mike Qube

#13
Is this where it would be leaking from if it were the clutch slave?

If so, there doesn't seem to be anything from that area at all. If that isnt the area, where would it be?
I ran the bike in my shed and there was a little bit of smoke, having it up on the rear stand gave me a better view of where it was coming from:

It seems to be on the exhaust pipes more towards the left side of the bike under the chain area.
The black crap on the floor under the bike isnt from leaks, it's from the globs that I pulled out of the sprocket area.

Mike Qube

I was doing a search for the clutch slave cylinder on google to see if I could figure out where it is. Everything I could find shows it on the left side of the bike right next to or in front of the sprocket cover. It doesnt seem that I have anything like I saw in the the search on that side:

Here's one of the pics I found that shows the clutch slave: