What's leaking from the crankcase....grease? *pic included* Help diagnose

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nidyanazo

nidyanazo

New Member
May 25, 2010
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This is leaking through the crankcase..



..Seems like grease, possibly from the clutch shaft.
There is a small piece of gasket missing there...


Was thinking it is some assembly grease for the clutch shaft...

Also wondering about using some RVT gasket maker sealant right there...

What are your thoughts guys?
 
Dave31

Dave31

Active Member
Mar 1, 2008
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Aztlán, Arizona
I was told the bearings go dry after they sit sideways in a box forever before it is sold. They over compensate with grease for this reason so when you run it grease will come out;at least that was what i was told..

I have had many, many engines do that and they usually stop after a little while.
 
Fulltimer

Fulltimer

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Aug 13, 2010
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Yep, it looks like grease. My suggestion would be to tear it down and replace the gasket. If there is a bad spot in the gasket water/dirt can get in there.

Terry
 
Goat Herder

Goat Herder

Gutter Rider
Apr 28, 2008
6,237
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Yes it will stop leaking putting a prefect smear of rtv into the crack then neatly wiping it off will be fine. I had a few china;s apart recently and gave a summery of what I found. http://motorbicycling.com/f39/little-help-norm-24715.html

The clutch part is separated from the crank case part by the casting and gasket. If it is running fine don't think it is going to be a prob.
 
maurtis

maurtis

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Dec 14, 2011
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I have this same issue. Almost through my second gallon of 24:1 break-in mix (so not many miles on my motor) and still getting some seepage from the same spot. It is not coming from the clutch cable holder bolt, but between the case halves.

It does seem to be slowing down. Should I just leave it be, or seal it up with some rtv? I do not want to lose too much lube.

The motor is running great otherwise.
 
2door

2door

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Sep 15, 2008
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maurtis said:
I have this same issue. Almost through my second gallon of 24:1 break-in mix (so not many miles on my motor) and still getting some seepage from the same spot. It is not coming from the clutch cable holder bolt, but between the case halves.

It does seem to be slowing down. Should I just leave it be, or seal it up with some rtv? I do not want to lose too much lube.

The motor is running great otherwise.
Click to expand...
Unless you have experience, or want it, with tearing the engine completely apart to replace the case gasket you can seal that area with some silicone based sealer. Clean the area well with a solvent, dry then smear the sealer into the area where the grease is coming out. That will at least slow, if not stop anymore leaking. I wouldn't worry about loosing too much grease. The clutch shaft is usually well lubricated from the factory.
Good luck.
Tom
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rustycase

rustycase

Gutter Rider
May 26, 2011
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IMO

I'd consider that little bit of oozing grease a good sign the factory lubed the shaft effectively!

Wipe it off with a Qtip if it bothers you, but at least now you are aware that when your drive system/clutch begins to make a bit of noise, that grease IS required in there.

lol the oozing grease is just another indication of the fine quality machining on the chinagirl cases! lol gotta love 'em!

...It's like an old harley that doesn't leak... somethings wrong! lol

Best
rc
 
maurtis

maurtis

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Dec 14, 2011
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Kyle, TX
2door said:
Unless you have experience, or want it, with tearing the engine completely apart to replace the case gasket you can seal that area with some silicone based sealer. Clean the area well with a solvent, dry then smear the sealer into the area where the grease is coming out. That will at least slow, if not stop anymore leaking. I wouldn't worry about loosing too much grease. The clutch shaft is usually well lubricated from the factory.
Good luck.
Tom
__________________
Click to expand...
Thanks Tom, since I plan on picking up some fuel resistant RTV to help seal the carb, I can schmear some where the leak seems to be. Thanks!
 
Al.Fisherman

Al.Fisherman

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Sep 9, 2009
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Old post, I bet it's fixed. Here is a picture of a case, you can see how thin the compartments that the gasket goes. This picture was for someone else, but you can see there isn't much gasket surface.
 
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robbomberbomyea

robbomberbomyea

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Dec 10, 2011
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cool saw a leak on mine today,bottom of case,now i wont worry about it,clean and seal it.thought might have to do complete overhaual before it even got broke in.third build, others no such prob but all three differant makes.
 
Al.Fisherman

Al.Fisherman

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robbomberbomyea said:
cool saw a leak on mine today,bottom of case,now i wont worry about it,clean and seal it.thought might have to do complete overhaual before it even got broke in.third build, others no such prob but all three differant makes.
Click to expand...
If you have a leak on the bottom of the case, is it under the crankshaft section, or the clutch shaft section. If under the crankshaft, I don't think RTV will cure the problem, as there is pressure exerted at the leak. Although I don't really like JB Wield, on most applications that members do, I feel that this problem just might need it (use sparingly). Under the cam shaft section, go with RTV. Make sure the area is clean. A little spray of starting fluid, throttle body cleaner, alcohol, or the like will prep it for the RTV, or JB. If mine, I'd drain fuel, lay bike on its side overnight, clean then repair.
 
robbomberbomyea

robbomberbomyea

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Dec 10, 2011
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seems like its the clutch side ,rear area, only see leak when its not running.looked after wiping clean while running no sign of oil.pos air leak? as i close choke sems to keep running then slowly dies.
 
Al.Fisherman

Al.Fisherman

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Sep 9, 2009
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robbomberbomyea said:
seems like its the clutch side ,rear area, only see leak when its not running.looked after wiping clean while running no sign of oil.pos air leak? as i close choke sems to keep running then slowly dies.
Click to expand...
Sound like it might be the (case half) gasket is leaking into the clutch housing and this can cause a vacuum leak like you describe. Clean it good and apply some RTV, if that doesn't stop it, I'd go with JB Weld, just a dab over the leaking area. If a vacuum leak, it still could be there through the clutch shaft seals.
 
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