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water mixing with gear oil in my transmission

tripleman

Just got it firing!
Joined
May 3, 2009
Messages
22
The first time I drained the gearbox, the oil was greenish brown which must be water mixing with the oil. About 1,000 miles later, I checked it again and it is getting water and mixing with the gear oil once again. What is the fix to keep water out of the gearbox? How do I locate the vent tube assuming this is the culprit. I thought that maybe when I was washing it that water was entering somehow. I checked the air filter box for condensation but it is bone dry. Help!
 
Is it water or gremlins adding food coloring? What type of environmnet do you live in, condensation? Trans not getting hot enough to vapor off water? What color is the oil going in? Do you wash with garden hose or pressure washer?
 
GU07801_50.gif


You can see the vent, it's on the RH side at the rear and has a pipe attatched, or should have. Dunno where this goes? Maybe to the airbox. Maybe just to atmosphere, can't remember and haven't got a bike handy to go and have a look at right now.

If the pipe has come off then that would be a point of ingress. If the pipe isn't connected to anything that too mifgt cause a problem if it's venting end is in the line of fire from spray off the back wheel. The earlier six speed boxes didn't have a tube on the vent and it was diretly in front of the tyre :blink: . V11's are notorious for filling their gearboxes with water but I've never had a problem with a Griso??? Or any of the other Nuovo Six Speed bikes.

Pete
 
On the Norge, and I would guess on other similar models the vent tube simply tucks under the intake of the air box. When I changed out my Norge's air filter a couple of months ago I found this hose, the upper end of which didn't plug into anything. When I blew into it, the air was going somewhere then the air would blow back out and it smelled like gear oil. So I'm assuming this was the vent hose for the gear box.
 
It could be the garden hose when I wash the bike. I see the vent tube coming off of the transmission but have not been able to see where it ends without dismantling part of the bike. Someone told me earlier that the tube itself could be perforated and easily accepts water. Either way, I need to inspect the complete tube at some point. In the meantime, I am going to be especially careful washing the bike.
 
I live very near to the equator where relative humidity is above 80% all day and these are the gear oil I drained from my 2009 Griso 8V recently.

Left being transmission/gear box oil and the one on the right is oil from CARC, both oils drained after 10,000km (6250miles)/12 months and hit not less than 10 times in tropical torrential rain.

The oils are dark but clear, I can't seems to capture the "clearness" with my point and shoot camera.

Phang

PDSCN6835.jpg
 
I have 112,000 km on my griso, the last gear oil change, the oil came out near white. I have put another near 3k on, and found the box had water enter again, Drained, and had an extra 100ml of fluid in the box, than what I put in, Had a real good look over the box externally for leaks, checked the vent hose, possibly as noted here, maybe water could have entered there, though I have never shifted where the hose goes, or how I wash. Will look at placing elsewhere when put new oil in, and check again after a few rides.
Interesting all the same.
 
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