BMW K bikes (Bricks)

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1Back to top Go down   Fork seal leaking Empty Fork seal leaking on Fri Apr 19, 2019 4:08 am

audibob

audibob
Life time member
Life time member
I recently changed a fork seal only to find the new one leaked, as did the second .

Everything was clean prior to fitting, I used cling film top of the leg to protect the new seal .

A seal driver tool was used to fit them.

Seal lube applied  but both leaked .

I then ordered a set from a different, well known uk  supplier, and this time all is good.

The seal from  the second set did feel more resistant when sliding it down the fork leg, 

 both sets were marked 41.4mm , perhaps my bike prefers blue seals rather than black ones.

Bob


__________________________________________________
Yamaha 90
Honda CD 175
Honda CB 360 
Triumph T 140V Bonneville
Triumph T150 Trident
Honda CB750 F1
Cz 175
Yamaha XS 750
R 100/7
R 80
K100 LT
K100 LT current bike
    

2Back to top Go down   Fork seal leaking Empty Re: Fork seal leaking on Fri Apr 19, 2019 5:30 am

MartinW

MartinW
Life time member
Life time member
There was a certain brand of seal that was renown for leaking, I can't remember the brand. I've had my current seals for nearly twenty years. I fill under the dust cap with heavy silicone grease which seems to have worked and lengthened their life. I change the grease every couple of years or more often in dusty conditions. Other Brickers have had success with a tool called Seal Mate which can clean out any crud under the lip. you can save money and make one out of the side of a plastic soft drink bottle.
Regards Martin.


__________________________________________________
K75s Hybrid
    

3Back to top Go down   Fork seal leaking Empty Re: Fork seal leaking on Fri Apr 19, 2019 11:55 am

Laitch

Laitch
Life time member
Life time member
@audibob wrote:I recently changed a fork seal only to find the new one leaked, as did the second . . . .  both sets were marked 41.4mm
Was it an OEM seal?



Last edited by Laitch on Fri Apr 19, 2019 5:47 pm; edited 1 time in total


__________________________________________________
1995 K75 77,000 miles
Fork seal leaking Usa-lo10
    

4Back to top Go down   Fork seal leaking Empty Fork seal leaking on Fri Apr 19, 2019 2:58 pm

audibob

audibob
Life time member
Life time member
My tubes measure 41.4mm  

My leaky black seals came from Motorworks,  the blue seals are from Motobins.

Bob


__________________________________________________
Yamaha 90
Honda CD 175
Honda CB 360 
Triumph T 140V Bonneville
Triumph T150 Trident
Honda CB750 F1
Cz 175
Yamaha XS 750
R 100/7
R 80
K100 LT
K100 LT current bike
    

5Back to top Go down   Fork seal leaking Empty Re: Fork seal leaking on Fri Apr 19, 2019 5:53 pm

Laitch

Laitch
Life time member
Life time member
@audibob wrote:My tubes measure 41.4mm  
That seems to be measurement alright.


__________________________________________________
1995 K75 77,000 miles
Fork seal leaking Usa-lo10
    

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