BMW K bikes (Bricks)

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1Back to top Go down   Strange sound at 3000rpm Empty Strange sound at 3000rpm Sat Nov 05, 2022 7:12 pm

tassoni

tassoni
active member
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Morning team, I took my bike a K100RS to ProCycles at St Peters and cane out with $3750 after they found leaks and all sorts of things which I couldn't argue about but my main problem is riding my bike home I get to 3000 rpm and my engine starts giving off a strange flat vibrating sound, I'm sorry it is hard to describe, I'm going to take a recording of the sound, now today it's a beautiful sunny day and I'm worried about riding my bike in case the sound is something serious, I've called them to let them know i'm bring the bike back tomorrow, until I can add the recorded sound stay away from Pro Cycles at St Peters.

    

2Back to top Go down   Strange sound at 3000rpm Empty Re: Strange sound at 3000rpm Sun Nov 06, 2022 9:44 am

92KK 84WW Olaf

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You paid them $3750?

Can you add your bike VIN and year, there are different models ABS 8v and 16v engines.

There is a wealth of knowledge in the group here and lots of folks more than happy to help in exchange for beer tokens.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 49,840 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

3Back to top Go down   Strange sound at 3000rpm Empty Strange sound at 3000rpm Sun Nov 06, 2022 9:48 pm

tassoni

tassoni
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Im sorry, I have a 1985 BMWK100RS I think it is an 8 Valve engine, I took it back to the work shop and they dont know what it might be, they said it could be the gear box, it went in with no rattling noise on revving up or backing off, I had a new cluck plate installed with this over priced service, the mechanic said maybe because the new clutch plate is in and making connection it maybe causing something else to make that sound.

    

4Back to top Go down   Strange sound at 3000rpm Empty Re: Strange sound at 3000rpm Sun Nov 06, 2022 11:49 pm

Laitch

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Record the sound as much as you can, post a video containing the sound on YouTube, and post a link to the YouTube video here.


__________________________________________________
1995 K75 81,000 miles
Strange sound at 3000rpm Usa-lo10
    

5Back to top Go down   Strange sound at 3000rpm Empty Re: Strange sound at 3000rpm Mon Nov 07, 2022 12:18 am

Rick G

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When it starts making this noise pull the clutch lever in a bit, till it gets firm, and see if the noise goes away. I have a feeling that they may noy have greased the wire ring in the clutch basket.


__________________________________________________
"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.
    

6Back to top Go down   Strange sound at 3000rpm Empty Re: Strange sound at 3000rpm Mon Nov 07, 2022 12:43 am

duck

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Rick G wrote:When it starts making this noise pull the clutch lever in a bit, till it gets firm, and see if the noise goes away. I have a feeling that they may noy have greased the wire ring in the clutch basket.

How would that cause a noise? I get that it needs to be lubricated for when the diaphragm spring deflects when the clutch is used but if you're in gear then I don't see how that would cause noise.


__________________________________________________
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 (x2)
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
    

7Back to top Go down   Strange sound at 3000rpm Empty Re: Strange sound at 3000rpm Mon Nov 07, 2022 3:04 am

Rick G

Rick G
admin
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I can't offer an explanation but the first time I heard it was a K100 I bought and the next time was when I neglected to lube it when replacing the clutch in my own K100.


__________________________________________________
"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.
    

8Back to top Go down   Strange sound at 3000rpm Empty Strange sound at 3000rpm Mon Nov 07, 2022 3:53 am

tassoni

tassoni
active member
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That sounds about right to me, I've taken the bike back to them to sort this odd noise out, I dont want to ride the bike in case it causes more damage, thank you for the wise information.

    

9Back to top Go down   Strange sound at 3000rpm Empty Strange sound at 3000rpm Fri Nov 18, 2022 4:36 am

tassoni

tassoni
active member
active member
My K100RS 1986 is back with the mechanics who area stumped as to what is making that sound, they are replacing the bearings, thankfully BMW is wearing the cost for this exploration, I just want my bike back without that awful sound, it's very disheartening when there mechanics say they are stumped.

    

10Back to top Go down   Strange sound at 3000rpm Empty Strange sound Fri Nov 18, 2022 4:55 pm

daveyson

daveyson
Life time member
Life time member
Do they specialise in BMW and certain others? 

When they replaced the clutch the thrust washer might have fallen off and been lost. If they're not familiar with bricks, it would seem that everything is in order. Can they verify the fibre thrust washer was installed on the clutch basket before the clutch basket was installed?

 It should be on the clutch basket when they remove it. With the revs maintained, did the noise disappear with the clutch pulled in?

Maybe the balanced clutch parts weren't put back in their correct orientation, can they verify that? I guess that would be more of a vibration than a sound.  From the factory, there are two white paint marks, and one yellow, they should be spaced 120 degrees apart.

Can you post a video of the sound?


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

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