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Gear Oil leaks when bike is on center stand.

 
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Jydtw



Joined: 19 Jun 2018
Posts: 15

PostPosted: Thu Dec 13, 2018 1:37 am    Post subject: Gear Oil leaks when bike is on center stand. Reply with quote

If I put the bike on the center stand and allow it to run till its up to running temp. the bike will.leak gear oil.
I'm pretty sure its gear oil because years ago I added final drive/gear oil after replacing a starter clutch.This smells the same.
I purchased the bike with about 70,000 miles on it.
Bike runs great. Engine oil level never changes.this only occurs when I run the bike to operating temp or beyond while it's on the center stand. It does not happen on the side stand., doesnt happen if I only run it a few minutes on the center stand.

Any ideas?
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Jydtw



Joined: 19 Jun 2018
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PostPosted: Fri Jan 18, 2019 12:02 am    Post subject: Re: Gear Oil leaks when bike is on center stand. Reply with quote

Jydtw wrote:
If I put the bike on the center stand and allow it to run till its up to running temp. the bike will.leak gear oil.
I'm pretty sure its gear oil because years ago I added final drive/gear oil after replacing a starter clutch.This smells the same.
I purchased the bike with about 70,000 miles on it.
Bike runs great. Engine oil level never changes.this only occurs when I run the bike to operating temp or beyond while it's on the center stand. It does not happen on the side stand., doesnt happen if I only run it a few minutes on the center stand.

Any ideas?


I thought a little harder about this and looked a little closer.

I need to get my bike up on a stand but I think its transmission oil.
That makes a lot more sense because it drips down onto the exhaust. Cant be gear or final drive oil. Has to be from the transmission.
Anyone have any thoughts?

I seems to only leak if I leave the bike on the center stand and let the bike come up to temperature. As far as I can tell its doesnt like if I start it , jump on a ride. Never had any problems shifting.
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Flying Duck
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Joined: 27 Jan 2005
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PostPosted: Fri Jan 18, 2019 2:54 am    Post subject: Reply with quote

What do you mean it can't be gear oil? That's what's in the transmission.

Sounds like the boot at the rear end of the clutch pushrod might be worn and leaking. Not a big deal.


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Scott_Anderson
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PostPosted: Fri Jan 18, 2019 8:38 am    Post subject: Reply with quote

I tend to agree with Duck, probably the push-rod boot, however........
You might want to check the transmission oil fill level, make sure that it isn't overfilled, then leaking out of the top side vent.
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Flying Duck
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PostPosted: Fri Jan 18, 2019 11:15 am    Post subject: Reply with quote

SA: It won't leak if overfilled. When I bought my RS it had recently been serviced at Ventura BMW and some dolt there had filled the transmission to the brim and it didn't leak out the vent cap. (The front tire was also mounted backwards. I would not recommend Ventura BMW.)

I discovered the overfilled transmission after riding it from Malibu to SF where I stopped at a friend's place to give the bike a post purchase once-over and took the transmission fill plug off to check the gear oil level.
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Jydtw



Joined: 19 Jun 2018
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PostPosted: Fri Jan 18, 2019 11:37 am    Post subject: Reply with quote

Flying Duck wrote:
What do you mean it can't be gear oil? That's what's in the transmission.

Sounds like the boot at the rear end of the clutch pushrod might be worn and leaking. Not a big deal.



Yep your right about the gear oil being in the Tranny LOL. 😁

Initially I was thinking final drive oil, but the location of the drip kind of rules that out. In the spring I'll check closer but my guess is that boot your showing is the issue. Just threw me for a bit cause I never seemed to have the issue until I decided to flush and refill the cooling system. That required me to have the bike on the center stand running into full operating temperature range.
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Grunter
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PostPosted: Sun Jan 20, 2019 5:19 am    Post subject: Leaking Boot Reply with quote

These are common on all 'K' bikes up to and including the K1100. Easy and cheap to replace but a bit of a fiddle to refit. Everything is straight forward until you have to fit the flimsy screw clip to hold it onto the back of the casing. The last time I replaced one on my K75, I finished up using a zip tie and that was 6 years ago and it is still good.

If you have the hands and fingers the size of a small child it would be easy - very easy, to fit the original metal one
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Jydtw



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PostPosted: Fri Feb 08, 2019 6:20 pm    Post subject: Re: Leaking Boot Reply with quote

Grunter wrote:
These are common on all 'K' bikes up to and including the K1100. Easy and cheap to replace but a bit of a fiddle to refit. Everything is straight forward until you have to fit the flimsy screw clip to hold it onto the back of the casing. The last time I replaced one on my K75, I finished up using a zip tie and that was 6 years ago and it is still good.

If you have the hands and fingers the size of a small child it would be easy - very easy, to fit the original metal one


Ok put in a new battery and cranked it up today. Same thing as in the fall. Started leaking after running for about 5 minutes on the center stand.i attached some pics. Might get a video in later.
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Mike d
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PostPosted: Sat Feb 09, 2019 7:01 am    Post subject: Reply with quote

You haven't said whether you changed the boot or not.


Mike
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Jydtw



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PostPosted: Sun Feb 10, 2019 4:41 pm    Post subject: Reply with quote

Mike d wrote:
You haven't said whether you changed the boot or not.


Mike



No I have not changed the boot yet. To cold right now. I need a nice warm day and some time. Its leaked quite a bit in the last year so by now it must need some gear oil too.
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Jydtw



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PostPosted: Mon Feb 11, 2019 2:19 am    Post subject: Reply with quote

Flying Duck wrote:
What do you mean it can't be gear oil? That's what's in the transmission.

Sounds like the boot at the rear end of the clutch pushrod might be worn and leaking. Not a big deal.



Any idea what this part is called on the BMW parts listing?

I see BMW list a gasket set (kit);as part of the transmission that shows the pushrod . Part # 23001464048. I wonder if that includes the part I need.
Anyone ever order that transmission gasket kit?
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Flying Duck
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PostPosted: Mon Feb 11, 2019 4:46 am    Post subject: Reply with quote

23131338731 (cup) is what you need.


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Jydtw



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PostPosted: Mon Feb 11, 2019 8:59 am    Post subject: Reply with quote

Flying Duck wrote:
23131338731 (cup) is what you need.



I appreciate the response.

That looks more like a seal that the push Rod passes through.

Is this the part referred to (circled in red). The part circled looks more like a.boot kind of like on a car axle. Although I suspect that seal/grommet would be behind that and potentially the cause.
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Jydtw



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PostPosted: Mon Feb 11, 2019 9:02 am    Post subject: Reply with quote

Jydtw wrote:
Flying Duck wrote:
23131338731 (cup) is what you need.



I appreciate the response.

That looks more like a seal that the push Rod passes through.

Is this the part referred to (circled in red). The part circled looks more like a.boot kind of like on a car axle. Although I suspect that seal/grommet would be behind that and potentially the cause.


It is too cold for me to mess with this right now. We are expecting more snow and this.might be best addressed using a lift but I do want to be ready when we get back above 40 degrees.
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Flying Duck
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PostPosted: Mon Feb 11, 2019 9:55 am    Post subject: Reply with quote

That's the only part that seals gear oil into the back of the transmission. (Aside from the output shaft seal.)

The only seal that the clutch pushrod passes through keeps gear oil from going forward. If that seal fails then the bike will leak gear oil at the front of the transmission. That part is 23131239891. (14 in the diagram below.)


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86 K75C w/paralever, hi perf cams,TURBO!
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Jydtw



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PostPosted: Mon Feb 11, 2019 1:43 pm    Post subject: Reply with quote

Flying Duck wrote:
That's the only part that seals gear oil into the back of the transmission. (Aside from the output shaft seal.)

The only seal that the clutch pushrod passes through keeps gear oil from going forward. If that seal fails then the bike will leak gear oil at the front of the transmission. That part is 23131239891. (14 in the diagram below.)



Ok looks like I will need part #2 possibly 3. Probably 5 and 6 as well.
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Flying Duck
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PostPosted: Mon Feb 11, 2019 3:56 pm    Post subject: Reply with quote

You just need the #6 cup. The hose clamp is worm driven and reusable.
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86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE
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