BMW K bikes (Bricks)

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1Back to top Go down    Rear Wheel Bearing on Sun Jun 11, 2017 4:40 pm

JGT

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The large crown wheel ball race. Is that a BMW only part or readily available from a bearing supplier? If so, anyone have the bearing manufacture part number/code for it? I'm guessing it would be cheaper to buy that way than a 'genuine' BMW bagged part. John


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1987 K75s 1969 Bultaco Matador
    

2Back to top Go down    Re: Rear Wheel Bearing on Sun Jun 11, 2017 9:22 pm

92KK 84WW Olaf

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k100virgin wrote:The large crown wheel ball race. Is that a BMW only part or readily available from a bearing supplier? If so, anyone have the bearing manufacture part number/code for it? I'm guessing it would be cheaper to buy that way than a 'genuine' BMW bagged part. John

I just did mine, recommendation from someone with nothing to gain and huge experience of doing them was to buy the BMW part, you also need the seal to go with it and it's a separate part. Its the same bearing on the R bikes and on the paralevers.

Never actually checked if there was one from a bearing supplier but the same person who recommended that one to bea BMW bearing quite happily usesbearing suppliers for the other bearings.

Motobins was a good source but check Motorworks too.

Don't let that bearing go long if it's on the way out.


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1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 84,600 miles
1983 K100RS 0011175 Fricka 29,000 miles Damn K Pox
    

3Back to top Go down    Re: Rear Wheel Bearing on Mon Jun 12, 2017 2:11 am

blaKey

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"Don't let that bearing go long if it's on the way out."

That's good to know. Sometimes you think "It'll be all right for a while".


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Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

4Back to top Go down    Re: Rear Wheel Bearing on Mon Jun 12, 2017 5:03 am

JGT

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Thanks for info. Bike passed its MOT last week but the tester found the very slightest of movement in the rear wheel, felt more than seen. Are we saying a new race would eliminate that completely or is there still a running clearance and movement? Bike has done 85,000 miles.


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1987 K75s 1969 Bultaco Matador
    

5Back to top Go down    Re: Rear Wheel Bearing on Mon Jun 12, 2017 10:38 am

92KK 84WW Olaf

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Mine was on 80,000 miles so same lifespan. If you leave it then it ruins the final drive with the race moving around and can [will] eventually break up unexpectedly. I had no apparent play, what alerted me to it was the feel of a bearing on the way out and I had worked out it was related to road speed and not engine speed.

Final drive doesn't even have to come off to do it. Done from the wheel side. Getting the clearances right is important, needs to be tight enough to remove play but still rotate freely.

That bearing is the only thing on the back end that's keeping it all together.


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1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 84,600 miles
1983 K100RS 0011175 Fricka 29,000 miles Damn K Pox
    

6Back to top Go down    Re: Rear Wheel Bearing on Mon Jun 12, 2017 1:15 pm

JGT

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Looks like a trip to Motobins, there only 35 miles away.


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1987 K75s 1969 Bultaco Matador
    

7Back to top Go down    Re: Rear Wheel Bearing on Tue Jun 13, 2017 12:54 am

Two Wheels Better

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That bearing (85X120X18) fits Airheads from 1981, all K bikes whether Monolever or Paralever, R850/1100/1150/1200C Oilheads, and the later K1200RS/GT & LT series. The current BMW p/n is 33121242211. An aftermarket bearing number is 61917/C3 by SKF. When it goes it goes. 'Bins has 'em for 39.00 inc VAT.


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1987 K100RS, '93 Framed K11/K12 engine 'Big Block', '09 K1300GT, '07 K1200R, '04 R1150RT, '95 R100 Mystic, '77 R75/7.
Sniff...can you smell that? I think it might be bullsh*t.

    

8Back to top Go down    Re: Rear Wheel Bearing on Tue Jun 13, 2017 4:19 am

JGT

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@Two Wheels Better wrote:That bearing (85X120X18) fits Airheads from 1981, all K bikes whether Monolever or Paralever, R850/1100/1150/1200C Oilheads, and the later K1200RS/GT & LT series. The current BMW p/n is 33121242211. An aftermarket bearing number is 61917/C3 by SKF. When it goes it goes. 'Bins has 'em for 39.00 inc VAT.


Will check price from my local UK bearing supplier out of interest but have to say not a bad price from Motobins and of course they have the seal and 'O' ring.


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1987 K75s 1969 Bultaco Matador
    

9Back to top Go down    Re: Rear Wheel Bearing on Wed Jun 14, 2017 5:23 am

JGT

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Price from my local bearing supplier as a special order a staggering 106.04!!!!!!!!!!!!?????????


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1987 K75s 1969 Bultaco Matador
    

10Back to top Go down    Re: Rear Wheel Bearing on Wed Jun 14, 2017 7:53 am

Dai

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I think that's full MRP as I've seen that price (or very close to it) quoted by a lot of different suppliers. The big bearing in my Guzzi bevel drives is in the same ballpark.


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

11Back to top Go down    Re: Rear Wheel Bearing on Sun Jun 18, 2017 5:15 am

KiwiK100

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K100virgin, what year K100 are you riding? If it has a paralever rear it could also be the pivot bearings causing the play. The FD bearing will not 'fail' overnight but gradually wear over thousands of miles/kilometers. A new bearing will totally illuminate any movement. You can check the FD bearing for wear by using a screwdriver as a stethoscope, placing the tip on the FD and the handle to your ear and spinning the rear wheel. If the FD bearing is worn you will pick up a rumbling sound. Alternatively, if you have a paralever place the screwdriver tip on the pivot bearing lock nut and get a second person to rock the rear wheel at 9.00/3.00 o'clock. If the pivots are worn or in need of re torquing, you will pick this up as a noticeable ticking sound through the screwdriver. Often when it is thought the pivots are worn, sometimes a re torque is all they need. BMW suggest 8Nm from memory, but 10 is better. When torquing mine I torque them a couple of times to 12Nm to expel excess grease before a final torque to 10Nm


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Current rides:
2002 K1200RS. Owned from new. Pacific Blue, Ohlins, Speiglers, Fiamms, HID. 167,000km
1991 K1. Schwartz metallic black, 18 month frame off restoration. 74,000km
1987 K100RS Style. Black, Ohlins, Race Tech springs, Braided lines. Fully restored. 53,000 miles.
The family history:
1951 AJS 500 single - my Dads ride
1953 Triumph Terrier - my Mum's ride
1916 Triumph Type H, Battle of the Somme, France WW1 - my Grand dads ride
    

12Back to top Go down    Re: Rear Wheel Bearing on Sun Jun 18, 2017 9:00 am

JGT

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Its a 87 K75s so standard back end. Picked up the parts from Motobins the other day so will wait until weather a bit cooler. 28C today, Its the humidity that's killing me. John


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1987 K75s 1969 Bultaco Matador
    

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