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Old 02-22-2015, 08:16 PM   #1
DaveCR OP
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Is this a gearbox leak?

I noticed this leak yesterday.. Bike is a 2008 GSA, 35k km.. Two months ago when I replaced the gearbox oil the leak was not there (I think). Rode it 200miles right after the maintenance.. And I haven't done too many rides since .. Maybe two or three.. Less than 100 miles each.. Paved roads..

I wanted to know your opinion, how bad it is.. Is it safe if I ride?

I haven't seen oil spills at the floor.. Today I washed the area to see if the leak appears again.. Oil seems to come from above the starter..




Any idea what's the average price to fix it?

Appreciate the help!



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Old 02-22-2015, 08:46 PM   #2
Girthy Knobkers
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I'd bet on a balancer shaft leak. I have no experience with this but have heard of it being more common than a rear main seal on these particular bikes. Expensive if you don't do it yourself.
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Old 02-22-2015, 11:07 PM   #3
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Think so. I do the work and is not very complicated, just impressive sight.

Smelling oil can you tell if the loss is the gearbox or engine.

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Old 02-23-2015, 12:39 AM   #4
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My 2010 R1200gs clutch started slipping around 20000km. At the time I was told it was very unusual. My 2011 R1200gs made it to around 8 000km with oil leaking just like your pictures with the dealer saying that they were doing nearly one a month. Both were rear main oil seals. It took an experienced bloke only 6 hours to replace this seal.
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Old 02-23-2015, 03:42 AM   #5
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Every time I R&R my gearbox oil I see and smell trans oil for a while after the change. I figure either I consistantly overfill and/or spill some in the fill plug area.

Same deal, no drips when parked, a little evidence of dirt sticking to oil,
never amounted to anything. This has been happening over at least 4 BMWs.
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Old 02-23-2015, 04:08 AM   #6
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About the smell.. There were some oil not very dirty, it didn't smell .. I mean, I did not notice a particular smell.. Not sure what that means hehe

So do you guys think it's fine to ride my bike without worrying ?

I saw a post about a guy who documented the main seal, the bike was split in half! :/



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Old 02-23-2015, 06:39 AM   #7
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Quote:
Originally Posted by bykemike View Post
Every time I R&R my gearbox oil I see and smell trans oil for a while after the change. I figure either I consistantly overfill and/or spill some in the fill plug area.

Same deal, no drips when parked, a little evidence of dirt sticking to oil,
never amounted to anything. This has been happening over at least 4 BMWs.
Just opening the container of GL5 usually results in an odor of Sulphur likely due to the EP additive MoSo2. After a gear case oil change, I too notice the smell. I also smell hot asphalt after riding the 650 foot asphalt driveway into the garage. The hot cat is responsible for many GS odors. As a result, I watch all lube levels closely.
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Old 02-23-2015, 11:41 AM   #8
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Rear main seal.
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Old 02-23-2015, 11:51 AM   #9
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Check the clutch oil, see if it is black or low. Maybe slave failed.

Of course if you are under warranty.....

Since this was noticed after a trans fluid change I have to ask what oil you put in. Did you change the engine oil at the same time? I personally believe in regular old 80W90 GL 5 gear oil, I have had good results with phillips or chevron.

Not all oils affect seals the same.

You can buy a bottle of transmedic, and add about 25 to 30 CC to either engine or transmission depending on which is leaking, and the leak will often get better or go completely away. They also make engine seal conditioners that can be added to the engine.
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Old 02-23-2015, 12:17 PM   #10
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I'd wipe that clean and see what happens. I wouldn't consider fixing it until it was leaving oil spots on the floor.
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Old 02-23-2015, 03:08 PM   #11
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+1 on Jims answer
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Old 02-24-2015, 04:15 PM   #12
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I did engine oil change, gearbox and final drive. Engine Castrol 10w50. Gearbox 75w90 GL5

I haven't noticed anything related to the clutch oil level.

I have wiped out the area and I will check it in 2 weeks when I get back home. :(

I'm worried cause I read that if this is engine oil it will contaminate the clutch and it will result in a failure and more $$

But after I have read your comments I feel better ... For now I will wait and check it out ..
I will also look for the transmedic to use it if it persists.

Thanks again for your comments !



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Old 02-25-2015, 05:38 PM   #13
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If you just changed the oil and overfill it slightly the oil will leak from there. Level the bike, check if you can see an air bubble (at the top of the window) in the oil check window. If not - drain the oil till you can see it.

About the smell - gear oil has very distinctive strong smell comparing to the engine oil that almost doesn't smell. Reading your comment I assume that its not gear oil.

It is quite common to see leaking counterbalance seal in these years. They usually leak if you overfill the engine or just leak coz they are worn. If draining the oil doesn't help (or it is not the case and level is right) more likely its the counterbalance seal. It is full weekend work for not highly experienced person. There is good writing on advrider about halfing the bike and changing the seal. Consider to change other things if you came so far. For example oil resistant friction plate (made by turetech or wunderlich and number of other companies).
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Old 02-25-2015, 07:42 PM   #14
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Thank you Alexgg! I will check on these things as well and report back what I find !


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Old 02-25-2015, 11:37 PM   #15
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Oils cheap wait till you see a drip at least.

How far do you ride this bike each year, is it your only transport. If it sits in the shed most of the time thats probably half your problem.
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