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Author Topic: Fork seals size - Help  (Read 6910 times)

Offline Xero

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Fork seals size - Help
« on: October 06, 2019, 01:06:24 PM »
Hi all,

I am trying to replace fork seals on 1990 K75RT.

I pulled out my existing seals and measured them. They are 41.4x51x6, but BMW part number I found (31421450127) are 41x51x6.
It seems that 41x51x6 are much more common and easier to buy. For example All Balls Fork Kit - 56-164.

Question, was 41.4 installed by previous owner a mistake and I should be fine ordering 41.0?

Thanks!
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  • 1990 K75RT, 2018 G310R

Offline johnny

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Re: Fork seals size - Help
« Reply #1 on: October 06, 2019, 01:36:44 PM »
greetings...

what is the last 7 of your vin... you did look that up didnt you... poast up some photos... wanna make sure you donts have a ktm front end on there... could be suzuki or ktm or showa or marzutchi or onieda... or k1200gt... what is it...

you wanna go oe on fork seals...  if you dont go oe the first time you will the next time... which will be very soon...

https://www.realoem.com/bmw/enUS/partxref?q=31421450127


* feckseals.png (38.25 kB . 558x576 - viewed 699 times)


* gasketring.png (21.27 kB . 700x493 - viewed 761 times)

j o
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Offline volador

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Re: Fork seals size - Help
« Reply #2 on: October 06, 2019, 01:37:31 PM »
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  • NYC NY
  • 1991 K100RS 1993 K75S ABS
5 BOROUGHS SISYPHEAN SOCIETY  MAINTAINING THE OBSESSION

Offline Xero

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Re: Fork seals size - Help
« Reply #3 on: October 06, 2019, 01:52:15 PM »
Thanks guys! I appreciate your quick replies.

I get it now. 31421451478 is 41.4
Now to find these in Canada..  I'll give BMW a call tomorrow.
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  • Toronto
  • 1990 K75RT, 2018 G310R

Offline Xero

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Re: Fork seals size - Help
« Reply #4 on: October 06, 2019, 02:08:55 PM »
Sorry Johnny, I must have missed it when you added your questions.

last digits of VIN: 6199050
I am attaching the pic, mine look exactly like that.



Quote from: johnny on October 06, 2019, 02:02:24 PM
greetings...

you didnt answer my questions or poast up photos...

why you defiant...

j o
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Offline volador

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Re: Fork seals size - Help
« Reply #5 on: October 06, 2019, 02:12:16 PM »
Quote from: johnny on October 06, 2019, 01:36:44 PM
greetings...
... could be suzuki or ktm or showa or marzutchi or onieda... or k1200gt... what is it...
j o
Or Fichtel or Sachs ...
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  • NYC NY
  • 1991 K100RS 1993 K75S ABS
5 BOROUGHS SISYPHEAN SOCIETY  MAINTAINING THE OBSESSION

Offline johnny

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Re: Fork seals size - Help
« Reply #6 on: October 06, 2019, 02:17:10 PM »
greetings...

those look like sacks to me...

j o
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Offline Xero

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Re: Fork seals size - Help
« Reply #7 on: October 06, 2019, 03:02:57 PM »
Found these. For some reason labeled 'Cup', but part number checks out.

https://shop.wolfbmw.com/p/BMW__/Cup/61134933/31421451478.html

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  • Toronto
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Offline Laitch

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Re: Fork seals size - Help
« Reply #8 on: October 06, 2019, 04:12:39 PM »
Quote from: Xero on October 06, 2019, 02:08:55 PM
I am attaching the pic, mine look exactly like that.
Does your moto have a two-piece front mudguard?
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Offline johnny

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Re: Fork seals size - Help
« Reply #9 on: October 06, 2019, 04:23:55 PM »
greetings...

i know where you can getts a bulletproof cup... they sell these at my local trigger clinic...


* Super-Troopers.jpg (49.41 kB . 493x576 - viewed 709 times)

j o
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Offline Laitch

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Re: Fork seals size - Help
« Reply #10 on: October 06, 2019, 04:33:17 PM »
Quote from: johnny on October 06, 2019, 04:23:55 PM
I know where you can getts a bulletproof cup... they sell these at my local trigger clinic...
It looks like that might be an audition for work as a blow-up doll model. I suppose the money is made in sales royalties.
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Offline volador

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Re: Fork seals size - Help
« Reply #11 on: October 06, 2019, 05:22:51 PM »
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  • NYC NY
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Offline Xero

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Re: Fork seals size - Help
« Reply #12 on: October 06, 2019, 05:33:27 PM »
Quote from: Laitch on October 06, 2019, 04:12:39 PM
Does your moto have a two-piece front mudguard?

Yeah it's a two-piece.
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  • Toronto
  • 1990 K75RT, 2018 G310R
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