BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down    Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 7:04 pm

floyd

avatar
Life time member
Life time member
Has anyone ever seen anything like this?!?!?! What has happened here?!?







__________________________________________________
K100 with lots of K1100 bits - mongrel of a thing...
    

2Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 7:26 pm

indian036

avatar
Life time member
Life time member
First guess would be a collapsed bearing allowing drastic misalignment of the gear meshing. Sad

Bill


__________________________________________________
1985 K100RT VIN 0028991 My original Very Happy (Historic rego)
1985 K100RT VIN 0029036 BOB the Blue Old Bike (Historic rego)
1990 K100LT VIN 0190452 Work in progress
1984 K100RT VIN 0023022 Work needing lots of progress

1986 K100RT VIN 0090542 Work needing lots and lots of progress
1993 K1100LT VIN 0183046 Work in progress
1993 K75S VIN 0213045 Newest toy, slightly non-original
    

3Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 7:33 pm

Rickmeister

avatar
Life time member
Life time member
WOW!!! Shocked Shocked


__________________________________________________
Assumption is the root of all stuff-ups!
    

4Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 7:43 pm

floyd

avatar
Life time member
Life time member



I literally woke the neighbours when I removed the cover this morning


__________________________________________________
K100 with lots of K1100 bits - mongrel of a thing...
    

5Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 8:43 pm

yamaguzzi

avatar
Silver member
Silver member
Oh man.That's nasty !


__________________________________________________
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://facebkfugitive.blogspot.com/
    

6Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 9:14 pm

Laitch

avatar
Life time member
Life time member
It looks arid in that assembly. Was there much fluid removed?


__________________________________________________
1995 K75T 68,000 miles
    

7Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 9:50 pm

RicK G

avatar
VIP
VIP
A bearing collapse or a tooth fractures and then one piece of lose metal then two and next thing it's all over.
I haven't seen a K do it before but the early Goldwings were very good at it and the Z1300 Kawasakis were known for sounding like a bag full nuts and bolts.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats." from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

8Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 10:24 pm

charlie99

avatar
VIP
VIP
ouch.... sad to see Floyd
commiserations mate '


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

9Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 10:32 pm

floyd

avatar
Life time member
Life time member
Feel like crying!

I have a Paralever here that needs new pivot bearings or bushes. I guess Ill take that route.

Ive just opened up the para FD and the gears look like new....The crown wheel tapered roller bearing is loose on the shaft and appears to have even spun on the shaft though......


__________________________________________________
K100 with lots of K1100 bits - mongrel of a thing...
    

10Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sat Oct 14, 2017 11:51 pm

RicK G

avatar
VIP
VIP
If the bearing has no play clean it with acetone and use some loctite for shafts and bearings, it should be OK there is not a big load on that bearing.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats." from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

11Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sun Oct 15, 2017 2:25 am

nino


Life time member
Life time member
Loosen big nut which holds pinion, probably. Pinion with a lot of freeplay lost position and went too deep.
Dont ask me how I know.

    

12Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Sun Oct 15, 2017 5:59 pm

92KK 84WW Olaf

avatar
Life time member
Life time member
That's exactly what my friend told me happens when the big bearing gets any play in it.

I went to him and said I thought there was a bearing out somewhere in the final drive as it was road speed related and not engine speed or gears. He went straight for that bearing and said it was on the way out. I had barely felt it but he was a dab hand on it. That was only 2 months after we did the rear main seal clutch etc etc etc.

Unconnected but a coincidence as we never touched the final drive.

Trouble is that when the bearing starts going you don't feel it at first.


__________________________________________________
1992 K100LT 0193214 Alaska Blue 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Mystic Red 58,645 now 69,000 miles
    

13Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Mon Oct 16, 2017 12:08 am

floyd

avatar
Life time member
Life time member
Just been to see Tor Motors in Yandina (BMW only mechanic) and he seems to be of the opinion final drives need to be rebuilt at intervals to prevent catastrophic failures such as this....Reckons the R1200's are the worst for it and he has seen diffs fail in under 20,000kns - which is rather absurd.

Anyways, took my spare paralever into him for a bit of an evaluation and he is adamant that I should have new crown wheel bearings fitted...parts and labor will be around $600 which is a massive kick in the gonads for an unexpected bit of work....

Id do it myself if calculating the shim sizes wasnt such a ball ache.


__________________________________________________
K100 with lots of K1100 bits - mongrel of a thing...
    

14Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Mon Oct 16, 2017 12:41 am

RicK G

avatar
VIP
VIP
The earlier R1200s were bad for both gearbox and rear drive but up until the last of the K1100s I would say the failure rate on drives was no worse than any other brand. I have seen early Ks with 400,000k on them and the drive is still going strong.
I think he sees a lot of BMW drive failures because he works mainly on BMWs. Like me saying I have seen 10 times as many Honda drives fail as to anything else but that's because I worked for Honda for 8 years.
BMW did change the drive about 2005-6 on the Rs and on the Ks when the across the frame 4 was introduced because they very obviously couldn't handle the torque.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats." from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

15Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Mon Oct 16, 2017 1:15 am

floyd

avatar
Life time member
Life time member
What surprised me most about what he said was that the diffs should be rebuilt as a maintenance item...No idea what intervals etc but he reckons when he services a bike he can tell what kind of condition the bearings are in and whether or not to rebuild at that stage...

Which makes me hesitant to purchase a used one...although it would be around half the cost of a rebuild...I guess the rebuild is the better value proposition as Id essentially have a brand new paralever with new pivot bushes to boot. hmmmm this K has kost me more than Id like...but thats motorcycles to some extent I guess...I need a higher paying job...


__________________________________________________
K100 with lots of K1100 bits - mongrel of a thing...
    

16Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Mon Oct 16, 2017 4:50 am

92KK 84WW Olaf

avatar
Life time member
Life time member
My friend here who is also ex BMW said the same thing about replacing as a service item but he was referring to the pivot bearings on thelater self destructing types rather than the K mono lever or Paralever ones. However just changing the big bearing is not so difficult as one might believe if you are doing them all the time. My mate can set a bolt to a required torque setting and then check it with a torque wrench to find its exact, just like a musician of experience can produce a perfect C. Doing that big bearing seems to be a wise move and after what I saw I think I would pull it at a defined mileage as it doesn't take much to do it.

Rather strangely my K had a strange incident August last year which was about 8k miles before the bearing went. The final drive oil started pissing out of it and it ran hot. So I changed the oil, did it again for a few days, changed the oil a second time and the problem disappeared and it went back to running at normal temperatures. No idea what happened or why. However I did keep an eye on it and then started to feel a barely perceptible change in the drive.

The early 16 tooth RS drive is like hens teeth and if you have one of those worth swapping the bearing if the drive is good.


__________________________________________________
1992 K100LT 0193214 Alaska Blue 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Mystic Red 58,645 now 69,000 miles
    

17Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Mon Oct 16, 2017 7:34 am

floyd

avatar
Life time member
Life time member
@92KK 84WW Olaf wrote:Rather strangely my K had a strange incident August last year which was about 8k miles before the bearing went. The final drive oil started pissing out of it and it ran hot. So I changed the oil, did it again for a few days, changed the oil a second time and the problem disappeared and it went back to running at normal temperatures. No idea what happened or why. However I did keep an eye on it and then started to feel a barely perceptible change in the drive.

Interesting you say that Olaf as I recall that my diff got hot to the touch shortly before I parked it away to go travelling. Dont know why I was checking it but started feeling it after a ride and it was hot as f%$&. Then it got parked....now im back and I did 200kms on it and all the way I was thinking "oh wow something sounds bloody awful" so finally I opened the case and found the loveliness depicted above....

So, heres the latest...I just made a payment to Ben at BSK Speedworks for a rebuilt 16t final drive....shipped to Aus all for a very very reasonable price....much much less than getting the paralever rebuilt locally.

So for less then half of the price of rebuilding a paralever, Ill get a rebuilt mono with a new OEM seal delivered in 4-5 days....good outcome for a horrible situation...



Last edited by floyd on Mon Oct 16, 2017 8:55 am; edited 1 time in total


__________________________________________________
K100 with lots of K1100 bits - mongrel of a thing...
    

18Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Mon Oct 16, 2017 8:45 am

charlie99

avatar
VIP
VIP
that's a win Floyd

goodonya Ben ...


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

19Back to top Go down    Re: Oh My GoD! Final Drive Self Destruct on Mon Oct 16, 2017 10:03 am

92KK 84WW Olaf

avatar
Life time member
Life time member
I have always had a habit of checking temperature on a few things when I travel.

On the K I always feel the final drive for temperature and that was the first alert I had to a problem, along with the oil coming out due to an overheat. Anything out of kilter increases friction which means heat generally well before you have a catastrophic problem..

I also out of habit have always checked bike wheels for bearing temperature.

Towing a trailer I always check the wheel hubs for temperature as in any sign of an overheating bearing.


__________________________________________________
1992 K100LT 0193214 Alaska Blue 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Mystic Red 58,645 now 69,000 miles
    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum