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"K13GT" Technical Q&A K1300GT- Technical Questions/Answers

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  #1  
Old 02-19-2017, 08:52 AM
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K1300GT - Low level of liquid for the Clutch

The level of clutch liquid has lowered significantly during last season (about 12k kms/7.5k miles) and it is still above the minimum mark. My bike is a 2010 with 55k km/ 35k miles.

Question: Should I simply raise the liquid level and continue to monitor or should I look for something else ?

The bike is running A1.

I am planning to bleed the circuit and refill to proper level. But would like to have your opinion/advices before doing so.

Allays have appreciated your recommendation and expertise.
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Old 02-19-2017, 09:22 AM
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Re: K1300GT - Low level of liquid for the Clutch

Luc:

A couple of things. First of all the fluid didn't evaporate - Check for a leak in the system.

Also it is a good idea to flush the system every 2 years or sooner. Typically okay for street bikes.

Again before I added fluid after checking for leaks I would flush the system.

Does the clutch feel normal - same engagement - no slipping?
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Old 02-19-2017, 09:32 AM
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Re: K1300GT - Low level of liquid for the Clutch

Thank you Bruce,

No there is no leak. The clutch was working well. We had about 25 inches of snow this week so I cannot do a road test now...

I will bleed and refill.

Thanks,
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Old 02-19-2017, 10:58 AM
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Re: K1300GT - Low level of liquid for the Clutch

LucP you probably already know this but the clutch fluid is not brake fluid, it's mineral oil and BMW doesn't have a recommended replacement just inspect level. So if you do flush and fill do not use brake fluid it will damage the seals.
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Old 02-19-2017, 12:18 PM
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Re: K1300GT - Low level of liquid for the Clutch

Quote:
Originally Posted by LucP
The level of clutch liquid has lowered significantly during last season (about 12k kms/7.5k miles) and it is still above the minimum mark. My bike is a 2010 with 55k km/ 35k miles.

Question: Should I simply raise the liquid level and continue to monitor or should I look for something else ?

The bike is running A1.

I am planning to bleed the circuit and refill to proper level. But would like to have your opinion/advices before doing so.

Allays have appreciated your recommendation and expertise.
From page 109 of the K1300S manual:
Check the clutch fluid level in reservoir 1
Wear of the clutch causes the fluid level in the clutch fluid reservoir to rise.

This is the same for RS/GT era also.
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Old 02-19-2017, 01:06 PM
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Re: K1300GT - Low level of liquid for the Clutch

Quote:
Originally Posted by Jako
From page 109 of the K1300S manual:
Check the clutch fluid level in reservoir 1
Wear of the clutch causes the fluid level in the clutch fluid reservoir to rise.

This is the same for RS/GT era also.
You know I knew that about the level rising with wear but I wrote the reverse thinking about brakes. I have corrected my origin post. Glad you are sharper than me.
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Old 02-19-2017, 03:09 PM
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Re: K1300GT - Low level of liquid for the Clutch

Quote:
Originally Posted by Jako
From page 109 of the K1300S manual:
Check the clutch fluid level in reservoir 1
Wear of the clutch causes the fluid level in the clutch fluid reservoir to rise.

This is the same for RS/GT era also.

Very interesting, my owner manual say exactly the same, it says liquid level should not drop and do not need to be replaced.

What could cause the level to drop ? I do not have any leak and it is not wear as the level would rise !

Thanks,
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Old 02-19-2017, 05:06 PM
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Re: K1300GT - Low level of liquid for the Clutch

Its most likely an internal leak which would not be visible, dumping fluid in to the engine oil which being mineral oil isn't that big a deal. Thats why wet clutches with basically an internal slave use mineral oil instead of brake fluid, just pull the slave and have a look see and take care of the leak with either a new ($200.00+) slave or rebuild if parts are available?
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Old 02-19-2017, 07:07 PM
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Re: K1300GT - Low level of liquid for the Clutch

Quote:
Originally Posted by LucP
Very interesting, my owner manual say exactly the same, it says liquid level should not drop and do not need to be replaced.

What could cause the level to drop ? I do not have any leak and it is not wear as the level would rise !

Thanks,

Hi Luc

IMO the cause is the slave /output cylinder (#1) on the clutch axle. It leaks inside the engine through the cylinder packing. Is not a dangerous situation because is a mineral oil and a little quantity.

About the oil, I suggest you to buy the BMW oil - Aral Pentosin LS. I don't think you spend much money for it. Searching on internet I've not found an equivalent on other first brands, but I'm sure is a common SAE 10 Hydraulic oil.
Quote:
My bike is a 2010 with 55k km/ 35k miles.
As reference, I had a K13R with 40KMi and the have another one with 42 KMi, and the level was/is the same as new.




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Old 02-20-2017, 09:06 AM
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Re: K1300GT - Low level of liquid for the Clutch

Quote:
Originally Posted by bernardo
Hi Luc

IMO the cause is the slave /output cylinder (#1) on the clutch axle. It leaks inside the engine through the cylinder packing. Is not a dangerous situation because is a mineral oil and a little quantity.


Thank you Bernardo, that make a lot of sense.
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