BMW K bikes (Bricks)


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1Back to top Go down   Fork Seals and Steel Braided lines Empty Fork Seals and Steel Braided lines Sun Aug 12, 2018 2:04 pm

yamaguzzi

yamaguzzi
Life time member
Life time member
I just did the seals and all the brake lines and pads in my K100. Everything went well and she's all back together ready for a test ride. Later this week I plan on taking the bike on it's first long distance ride since I brought her back to life last year. Anyway,when I was doing this work I saw that the rubber bellows under the upper faring were all torn and falling apart so I left them off until I can get replacements. What I am wondering is can this cause a problem in rain  or am I just thinking too much. Ed


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1988 K 100RS ,1975 Moto Guzzi 850-T , 1971 BMW R60/5 , 1971 Yamaha R5B,1969 Yamaha DS6C ,1966 Yamaha YM1 , 1965 Yamaha YDS3
https://motoguzzi850t.blogspot.com/
    

duck

duck
Life time member
Life time member
They're worthless. BMW didn't bother to include them on later bikes. Forget about them and don't bother trying to replace them.


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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

Ringfad

Ringfad
Life time member
Life time member
+1

I got new ones for my 8v RS and the did not last very long before they were ripped.


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Fork Seals and Steel Braided lines Ir-log10

   ;BMW; K100RS Style Black 1987 105K Km     ;BMW; K1 Black 1993 60K Km     ;BMW;  K1100RS Black 1996       ;BMW; K1 Blue 1990 25K Miles
    

ARbiker

ARbiker
active member
active member
Anything that helps to prolong the life of the fork seals is a bonus in my opinion but any gaiters of sufficient diameter should do the trick

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MartinW

MartinW
Life time member
Life time member
I replaced my seals about twenty years ago. The replacement seals are still going. What I did was pack heavy silicone grease (Herschells) under the dust covers and change the grease every couple of years. If you ride in dusty conditions change the grease more frequently. I also pack silicone grease under the rear master cylinder boot to keep out the water and crap.

There is a tool called a Seal Mate or Seal Buddy (Ebay) that has been used by others to fix seal leaks and clean out any crap. They can be bought or made out of an old soft drink bottle. I have made a few to supply a couple of mates bikes suffering from leaky seals. Depending on damage it sometimes works sometimes not. The application of  an ATF soaked rag on the seals  and allowed to soak for a while will also soften up hard seals. However by using the silicone grease that's all I have ever needed to do.

Regards Martin.



Last edited by MartinW on Sun Aug 12, 2018 9:09 pm; edited 1 time in total (Reason for editing : Bad link)


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1992 K75s
    

6Back to top Go down   Fork Seals and Steel Braided lines Empty Re: Fork Seals and Steel Braided lines Sun Aug 12, 2018 11:26 pm

yamaguzzi

yamaguzzi
Life time member
Life time member
Thanks for the input.I had a feeling those bellows things were useless but thought I had better ask.I like the silicone grease idea packed under the dust seals. I think I'll try that and do it before I leave on my trip this coming Thursday It sure can't hurt. Do you pack the whole dust cover or just put a bead over the seal? The bike is all back together and all that is left to do is get the rear brakes to bleed. For some reason I can't get all the air out after replacing the rubber hose with a steel braided one.They worked fine before. Oh well I'll get it done later on.I'm psyched to get out on an actual road trip on this bike.


__________________________________________________
1988 K 100RS ,1975 Moto Guzzi 850-T , 1971 BMW R60/5 , 1971 Yamaha R5B,1969 Yamaha DS6C ,1966 Yamaha YM1 , 1965 Yamaha YDS3
https://motoguzzi850t.blogspot.com/
    

7Back to top Go down   Fork Seals and Steel Braided lines Empty Re: Fork Seals and Steel Braided lines Sun Aug 12, 2018 11:59 pm

MartinW

MartinW
Life time member
Life time member
I pretty well fill it up. I used to use the $50.00 AU per tube Dow Corning high vacuum grease that was required on the K75 fluid damper. I have since located a pretty good substitute, Hershells Silicone Paste $8.00 AU per tube at Supercheap. It is not as thick as the high vacuum grease but it also does the job at a reduced price.

Regards Martin.


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1992 K75s
    

8Back to top Go down   Fork Seals and Steel Braided lines Empty Re: Fork Seals and Steel Braided lines Mon Aug 13, 2018 12:10 am

MartinW

MartinW
Life time member
Life time member
To get the air out I use a home made vacuum bleeder. However if you move your bars to the far left so that the reservoir is at the highest point. Then pump the lever while gently tapping the hose and master cylinder with the reservoir cap off you should observe air coming up. If that doesn't work then pump and secure the lever with a bungy cord so that the lever is being pulled and leave over night. The bars need to be turned to the left, and occasionally tapping the hose and master cylinder does help.

Regards Martin.


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1992 K75s
    

yamaguzzi

yamaguzzi
Life time member
Life time member
MartinW wrote:To get the air out I use a home made vacuum bleeder. However if you move your bars to the far left so that the reservoir is at the highest point. Then pump the lever while gently tapping the hose and master cylinder with the reservoir cap off you should observe air coming up. If that doesn't work then pump and secure the lever with a bungy cord so that the lever is being pulled and leave over night. The bars need to be turned to the left, and occasionally tapping the hose and master cylinder does help.

Regards Martin.
It turned out to not be air in the fluid.What happened was that when the hose was disconnected the piston moved and got stuck on that set screw that keeps it from shooting out the end of the master when there is no pedal in front of it. As soon as I turned that screw slightly the piston shot forward and I had line pressure . Now both front and rear brakes are solid as a rock.Tomorrow I test ride it ,change the oil and she's ready to travel !


__________________________________________________
1988 K 100RS ,1975 Moto Guzzi 850-T , 1971 BMW R60/5 , 1971 Yamaha R5B,1969 Yamaha DS6C ,1966 Yamaha YM1 , 1965 Yamaha YDS3
https://motoguzzi850t.blogspot.com/
    

10Back to top Go down   Fork Seals and Steel Braided lines Empty Re: Fork Seals and Steel Braided lines Mon Aug 13, 2018 2:26 am

MartinW

MartinW
Life time member
Life time member
Go forth and enjoy the fruits of your labours. Fork Seals and Steel Braided lines 112350
Regards Martin.


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1992 K75s
    

11Back to top Go down   Fork Seals and Steel Braided lines Empty Re: Fork Seals and Steel Braided lines Mon Aug 13, 2018 1:23 pm

yamaguzzi

yamaguzzi
Life time member
Life time member
MartinW wrote:Go forth and enjoy the fruits of your labours. Fork Seals and Steel Braided lines 112350
Regards Martin.
Thanks Martin I will !


__________________________________________________
1988 K 100RS ,1975 Moto Guzzi 850-T , 1971 BMW R60/5 , 1971 Yamaha R5B,1969 Yamaha DS6C ,1966 Yamaha YM1 , 1965 Yamaha YDS3
https://motoguzzi850t.blogspot.com/
    

12Back to top Go down   Fork Seals and Steel Braided lines Empty Re: Fork Seals and Steel Braided lines Tue Aug 14, 2018 2:27 am

brickrider2

brickrider2
Life time member
Life time member
A tube of handy silicone grease can be had at any Napa parts store for a reasonable amount of money.  Grease under those caps won't do a thing to prevent stone nicks on the forks tubes, which kill the seals.  BMW gaiters may or may not be the best quality; you decide.  However, many riders opt for Rancho Suspension gaiters, which are economical and available in many sizes as well as colors.

    

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