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1Back to top Go down   [solved]Clutch stop or thrust washer Empty [solved]Clutch stop or thrust washer on Wed Nov 20, 2019 9:33 am

tinyspuds

tinyspuds
Gold member
Gold member

I am about to start reassembly of my clutch and Clymer says I should start with the thrust washer on the output shaft. I’m 99% certain I didn’t remove one. Real OEM (item 10 on the fiche) calls this a ‘stop washer’ but it is spec’d in 1 of 2 thicknesses 1 or 1.2.5 mm). Neither Motobins nor Motorworks seem to stock it and there are discussions on here about whether this is a ‘real thing’. Do I need one, and if so how do I find out what size? Bit of a mystery. Apologies cant get rid of the bold.


Cheers, Stu

This is one of the part numbers, 11211460873


PS I have a small (3 or 4mm) amount of forward to back play on the output shaft. Is this normal?


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

2Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Wed Nov 20, 2019 12:49 pm

Ringfad

Ringfad
Life time member
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I just did my K1100LT Clutch and it had one.

The part is available from tills.de


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[solved]Clutch stop or thrust washer Ir-log10

   ;BMW; K100RS Style Black 1987 105K Km     ;BMW; K1 Black 1993 51K Km     ;BMW; K1100RS Red 1993 70k miles  ;BMW; K100 16V Black (ex ElectricMonk)  ;BMW;  K1100LT (Swiss) soon to be an RS
    

3Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Wed Nov 20, 2019 1:29 pm

tinyspuds

tinyspuds
Gold member
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Thanks RF. 1 or 1.25mm?

Now that I've checked the diameter I'm absolutely sure I didn't take one out. 

Anyone know what's going on with this esp. As it seems to be there or not depending on the year, the thickness seems a bit arbitrary, and the k75 doesn't have one att all even though that part of the clutch looks the same across models?


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

4Back to top Go down   [solved]Clutch stop or thrust washer Empty Clutch stop or thrust washer on Wed Nov 20, 2019 4:04 pm

Tom FKR

Tom FKR
Life time member
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G'day Stu, when the main seal and "O" ring was replaced on my 1986 K100RT, the thrust washer was broken.. I got a local parts supplier to get one and it was 1mm. I think the thickness of the washer was stated in the Real OEM website.
Cheers
Tom


__________________________________________________
1986 K100RT Ex Police (Slightly modified)
2010 BMW F650GS Twin
1992 R100R
    

5Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Wed Nov 20, 2019 4:50 pm

tinyspuds

tinyspuds
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Thanks Tom,
I’ll take a punt on the 1mm then. Real OEM shows the same part (diff number) in 1mm and 1.25mm config. There seems to be some very un-BMW inconsistencies in this application, but first I need to get back on the road (cabin fever), then I’ll do some more research.
Cheers, Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

6Back to top Go down   [solved]Clutch stop or thrust washer Empty Clutch on Wed Nov 20, 2019 4:56 pm

daveyson

daveyson
Silver member
Silver member
I recon you've got one alright, it probably stuck to the clutch housing when you removed it, and has fallen off along the way.

If you're working on a concrete floor, you have a good chance of finding it back. Backtrack where you took it.

Have a close look at the housing, it might still be stuck on. From memory, there is a lot of slop in the shaft.



Last edited by daveyson on Wed Nov 20, 2019 9:37 pm; edited 2 times in total (Reason for editing : Added last paragraph.)


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
    

7Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Thu Nov 21, 2019 9:03 am

mike d

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This washer has been discussed before, back in 2013:


http://www.k100-forum.com/t6518-flywheel-clutch-housing

Mike

    

8Back to top Go down   [solved]Clutch stop or thrust washer Empty Clutch stop or thrust washer on Thu Nov 21, 2019 4:37 pm

Tom FKR

Tom FKR
Life time member
Life time member
G'day again Stu, I meant to add to my last post that I measured the broken washer with a micrometer and it came in a whisker under 1mm. So the replacement washer was going to be 1mm thick.
Cheers
Tom


__________________________________________________
1986 K100RT Ex Police (Slightly modified)
2010 BMW F650GS Twin
1992 R100R
    

9Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Thu Nov 21, 2019 9:55 pm

MartinW

MartinW
Life time member
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If you are really concerned about the washer thickness using  Plastigage would give you a accurate measurement of the thickness required.
Regards Martin.


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K75s Hybrid
    

10Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Fri Nov 22, 2019 6:36 am

tinyspuds

tinyspuds
Gold member
Gold member
@daveyson wrote:Have a close look at the housing, it might still be stuck on. From memory, there is a lot of slop in the shaft.

Like anyone could be that dumb.

[solved]Clutch stop or thrust washer 423ff810

DOH!


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

11Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Fri Nov 22, 2019 6:39 am

tinyspuds

tinyspuds
Gold member
Gold member
Thanks everyone. 
New 1mm ordered, shame hidden away, moving on with my life [solved]Clutch stop or thrust washer 652573


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

12Back to top Go down   [solved]Clutch stop or thrust washer Empty Clutch on Fri Nov 22, 2019 7:26 am

daveyson

daveyson
Silver member
Silver member
There's no shame in dumb stuff, it's great for a laugh. I recommend further reading on it,  a UK book I had a couple of decades ago called "the book of heroic failures" which celebrates failure. It was great for a laugh.  I laughed until I stopped.

Actually I thought,  wouldn't it be funny if you looked on the floor for two hours only to find it still on the housing, which gave me the unfortunate idea to edit the post.


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
    

13Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Fri Nov 22, 2019 8:17 am

tinyspuds

tinyspuds
Gold member
Gold member
@daveyson wrote:There's no shame in dumb stuff, it's great for a laugh.

In which case I won’t be embarrassed to mention that I ordered the new one from leebmann24.de, and they sent me a lovely email in English to check that I really did intend to collect in person from Passau, Germany. [solved]Clutch stop or thrust washer 44271


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

14Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Fri Nov 22, 2019 10:12 am

Laitch

Laitch
Life time member
Life time member
@tinyspuds wrote:

I’m 99% certain I didn’t remove one.


You were right! Revel in that. cheers


__________________________________________________
1995 K75 73,000 miles
[solved]Clutch stop or thrust washer Usa-lo10
    

15Back to top Go down   [solved]Clutch stop or thrust washer Empty Clutch on Fri Nov 22, 2019 4:48 pm

daveyson

daveyson
Silver member
Silver member
So you recon those two examples are dumb, do ya? 

Try to get your hands on that book, you'll laugh hard. 

I removed a water trap from a sink once.  As I was holding it, I thought hmm,  I can't put this down without the water spilling out,  so I poured it down the sink! 

Beat that!


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
    

16Back to top Go down   [solved]Clutch stop or thrust washer Empty Re: [solved]Clutch stop or thrust washer on Fri Nov 22, 2019 5:08 pm

tinyspuds

tinyspuds
Gold member
Gold member
@daveyson wrote:Beat that!

Can’t lol!


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

17Back to top Go down   [solved]Clutch stop or thrust washer Empty Clutch on Sat Nov 30, 2019 7:30 pm

daveyson

daveyson
Silver member
Silver member
The thrust washer eliminates sliding steel to steel contact when the rubber dampers come under compression, and when the pressure is relieved, even though It's only a small amount.

If the measured clearance doesn't allow enough compression using a 1mm thrust washer after the clutch nut is torqued, a 1.25mm washer could be used. Having two washers also allows for more options when replacing the seal.

The K75 is a different animal, with balance weights  instead of an absorber. Since the shaft is one piece, it doesn't require the fibre washer.



Last edited by daveyson on Mon Dec 02, 2019 3:44 pm; edited 1 time in total (Reason for editing : Added last sentence to last two paragraphs.)


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
    

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