BMW K bikes (Bricks)

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1Back to top Go down   Steering Head Bearings Empty Steering Head Bearings Tue Jun 11, 2013 5:46 pm

larrikin

larrikin
Life time member
Life time member
I have to replace my Steering Head Bearings and I was wondering if I should use genuine or aftermarket ones.
I'll also be doing the the fork seals at the same time.


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Steering Head Bearings Au-log11Steering Head Bearings Au-log11
88 BMW K100RS

It increases my paranoia
Like lookin' at my mirror and seein' a police car
    

2Back to top Go down   Steering Head Bearings Empty Re: Steering Head Bearings Tue Jun 11, 2013 6:18 pm

japuentes

japuentes
Life time member
Life time member
Hi there, regarding the Steering Head Bearings I have not tried to find aftermarket replacements, but for the seals, could not find the correct size among common offer, only from aftermarket motorcycle spares suppliers. And the price saving from the original was so small that I considered the risk wasnt worth it, specially if you think that the original ones lasted almost 25 years.
Hope this helps
Best regards
JAP


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Steering Head Bearings 2854237993 1988 K100RS SE/ABS
    

3Back to top Go down   Steering Head Bearings Empty Re: Steering Head Bearings Tue Jun 11, 2013 9:20 pm

Rick G

Rick G
admin
admin
You can get good aftermarket bearings the NTN 4T 320/28X is a good replacement and Koyo also make one as for the fork seals experience of my own and from others here says buy genuine but whatever you do DON'T buy from Pyramid Parts for either as I am in the process of changing the bearings I got from them and replaced the forkseaks sometime ago as one actually turned the seal lip inside out on a big pothole.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1986 K75 GS.
    

4Back to top Go down   Steering Head Bearings Empty Re: Steering Head Bearings Tue Jun 11, 2013 11:09 pm

beanoldboy

beanoldboy
Life time member
Life time member
After market headset bearings work well , quarter the price , but buy OEM dust seal as the kit seal is way too much work .

http://www.airware.com.au
    

5Back to top Go down   Steering Head Bearings Empty Steering Head Bearings Sat Oct 29, 2022 1:22 am

redrockmania

redrockmania
Silver member
Silver member
I am grateful for RickG's post #3 cautioning about the poor quality of Pyramid bearings. I'm refurbishing a K1100RS steering stem from a supply of 4 Pyramid's I bought years ago (still in good condition when I opened the cardboard box) I fitted one as the replacement top bearing. Two things I noticed: 1) after fitting and packing with grease the bearing feels gritty and sloppy, not silky smooth; 2) The stamping on the Pyramid bearing is 320/28 not 320/28X. It seems the Pyramid offering is missing the magical X-factor! I'm junking the Pyramids and purchasing either Japanese or European.
Had a Titanic battle removing the bottom bearing from the base of the shaft. No joy with heat or my hydraulic press. Eventually got it off by carefully cutting 2 bits off it using a Dremel type tool with a small metal-cutting disk. My cuts were in an inverted V-shape. I then broke out the V bits using a cold chisel. Bastard of a job.

    

6Back to top Go down   Steering Head Bearings Empty Re: Steering Head Bearings Sat Oct 29, 2022 3:25 am

Rick G

Rick G
admin
admin
Easiest way to get the lower cone off is to drive a knife blade under the bearing then get a thicker wedge then a couple of small Tyre levers and it comes off quite easily. I have just done a K1100LT and worked fine.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1986 K75 GS.
    

7Back to top Go down   Steering Head Bearings Empty Steering Head Bearings Sat Oct 29, 2022 4:27 pm

redrockmania

redrockmania
Silver member
Silver member
I tried the Knife and tyre lever method without success - I got no movement of the  bearing cone when driving the knife in. The bearings I eventually removed appear to have been the original FAG bearings fitted at the factory in 1993. The surface of the stem tube and inner bearing cone surface had some dry deposit on them which appears to have caused some resistance to my attempts to remove the cone. 
I had a chat yesterday with my neighbour who has worked on heavy machinery for many years and has removed many bearings from shafts. He said his standard method is to use a stick or MIG welder and run a circle or two of weld around the outer face of the bearing cone and they then are easily removed. He doesn't use any other technique.

    

8Back to top Go down   Steering Head Bearings Empty Re: Steering Head Bearings Sat Oct 29, 2022 4:41 pm

Dai

Dai
Life time member
Life time member
I use that method on really recalcitrant bearings. Just wait until the whole assembly has gone completely cold - as often as not, the bearing just falls out. It's also safe to use on a bearing in an alloy housing as long as you have a relatively steady hand.


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1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

9Back to top Go down   Steering Head Bearings Empty Re: Steering Head Bearings Sat Oct 29, 2022 11:10 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I have a chunk of 10mm diameter rod that is peened out on one end from being hammered on.  That slight spread of the end can be held in the small space between the bearing race and the head.  A few minutes of tapping around the race with the rod will push the bearing down far enough to get my tire tools in the gap to lever the race the rest of the way. 

A little time with my heat gun on the steering head helps loosen the race in the head.


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Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

10Back to top Go down   Steering Head Bearings Empty Re: Steering Head Bearings Sun Oct 30, 2022 5:59 am

TacKler

TacKler
Life time member
Life time member
I have an excess of 5mm and 10mm brass rod and just cut to size and tap evenly around the lip.  A 2lb hammer helps.  

I have used the welding method once in the past.


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Red 1991 K75S
    

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