BMW K bikes (Bricks)


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ReneZ

ReneZ
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I was working on the bike (renewed timing chain) when I noted that the right side lower fix point for the fairing (RT) had a crack. Wanting to take the part of I tried to loosen the bolt, which is part of the bolts fixing the sump to the block. The bolt was so tight I wiped the allan key recess. Tried to hammer in a torx, but no joy. Tried a 'left thread' kind of tap, no joy. Heated it, no joy. ground a slot in the top to put a screwdriver in, no joy. Tried in impact screw driver, no joy. tried the last two with heat as well, no joy.

If I have to drill it out I have to lower the sump to get the remaining studd out, which means that the output shaft is no longer supported, which means the whole rear of the bike needs to come off if I'm not mistaking.........

Leaving as is is not an option, as meantime the fairing point has completely broken off.Evil or Very Mad

A beautiful day here, not a happy one though!


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Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland No mercy.......... I think I'm in the shit! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

MT350Explorer

MT350Explorer
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Sorry to hear your woes mate. There must be a way to shift the git without that pain. As you know I'm not technically gifted but what about welding a bolt or nut to the stump?

Am sure someone must have a solution

Best
Dave


__________________________________________________
1991 K100 RS 16 valve
    

ReneZ

ReneZ
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Yeah, regretfully I haven't got a welder and the access isn't easy...
No winners here it seems. No mercy.......... I think I'm in the shit! 177381


__________________________________________________
Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland No mercy.......... I think I'm in the shit! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

88

88
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Life time member
Rene, that's a bummer, I'm sure you left a little blue cloud of savory phrases and words behind you in the workshop. I can offer no advice only empathy as my gifts in these matter always result in me going backwards in similar situations, (like the time I ended up drilling out exhaust studs because I started changing the rear disk Rolling Eyes ).

Some one will chip in with a solution worthwile.

88KE


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No mercy.......... I think I'm in the shit! Ir-log1188....May contain nuts!No mercy.......... I think I'm in the shit! Ir-log11

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

K1 - 1989 - AKA Titan (unique K1/K1100RS hybrid by Andreas Esterhammer)
K1100RS - 1995. AKA Rudolf Von Schmurf (in a million bits)
K100RS - 1991 AKA Ronnie. Cafe racer project bike
K75RTP - 1994
K75C - 1991 AKA Jim Beam. In boxes. 
K1100LT 1992 - AKA Big Red (gone)
K100LT - 1988 - AKA the Bullion brick. Should never have sold it.
    

Crazy Frog

Crazy Frog
admin
admin
Now it's time to ride, and it maybe other solutions.
Since the bracket has only a crack but is still in one piece, why don't you bring the bike to a mechanic shop and ask them to weld the crack on the bracket. Just disconnect your battery and alternator when they weld.
You will be able to enjoy your spring /summer and take care of the problem late in the fall.
Are you talking about the back bracket #12?
No mercy.......... I think I'm in the shit! Bracke10

This bracket is not supporting the fairing (This is only a 6mm screw). If I recall it's there mainly to anchor the knee pads. The upper brackets are what support the fairing.

Another solution would be to cut the original bracket and manufacture one that attach to the next available bolt on the sump.

CF


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No mercy.......... I think I'm in the shit! Frog15No mercy.......... I think I'm in the shit! Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

92KK 84WW Olaf

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If it is bracket 12 referred to it looks similar to the one on the LT. I have been having some electrical problems and have taken the knee pads and boxes and the baffles inside the fairing off enough times. No 12 is the screw at the bottom of the knee pad and its a devil to find unless you know its there. Weld it up but disconnect everything first. Either way I woiuldnt let that stop me enjoying the bike. In truth even though there is a lot of plastic it does come off easily.


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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 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 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
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
A word of caution when welding on a K bike: I watched a coupla mates welding up a broken centre stand insitu and asked as the blue glow emanated from the welding tip whether they'd disconnected and isolated the ECU before attaching the earth point and beginning the job. They hadn't. The ECU was kaput. Disconnecting the battery on both sides isn't quite enough.

The local smalltown BMW dealer hand a secondhand ECU and sold it to them for $300. That was an expensive quick and easy stand fix!


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"How many cars did we pass today?" "ALL of them."
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT
    

ReneZ

ReneZ
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Thanks team! It's part 13 in the diagram, which is the lowest support/position bracket for the RT side fairing. Regretfully the crack became a fracture (yes, I did have something to do with that Rolling Eyes ); there is no way I could weld it back, didn't think about it as well as I had to replace the other side 6 months ago and bought the parts for both sides, being prepared and all that. didn't think I would need to salvage the old bit.
Welding another bolt on it might be the last option, will need to ask the neighbor nicely for his kit.....
Appreciate the tip to disconnect all sensitive electric equipment; I'll better disconnect the Starcom1, Garmin and FI ecu as well. Speedo probably better disconnected as well. Oh boy and we have the nicest riding weather here for what feels like ages Twisted Evil


__________________________________________________
Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland No mercy.......... I think I'm in the shit! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

K75cster

K75cster
Life time member
Life time member
If it wont come off and you wish to go out and play in the traffic could you not just wrap it in some of that exhaust wrap type stuff or maybe glass it till the weather turns against you??????????? There was a powder that when the catalyst was added to it, it would turn to steel in a second dont remember the name but itwas black stuff and it set like a rock in 1 second. That way the fixit man can have it when your finished playing


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Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

ReneZ

ReneZ
Life time member
Life time member
Just for Sxxxx and Gxxxxxx a picture of my joy!



No mercy.......... I think I'm in the shit! IMG_1996


__________________________________________________
Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland No mercy.......... I think I'm in the shit! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

88

88
Life time member
Life time member
That looks like a bitch of a spot to get a drill bit into even if you laid the bike down on an old mattress or such, Rene. Have you given full consideration to fabricating a bracket to go from the next stud along?
88


__________________________________________________
No mercy.......... I think I'm in the shit! Ir-log1188....May contain nuts!No mercy.......... I think I'm in the shit! Ir-log11

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

K1 - 1989 - AKA Titan (unique K1/K1100RS hybrid by Andreas Esterhammer)
K1100RS - 1995. AKA Rudolf Von Schmurf (in a million bits)
K100RS - 1991 AKA Ronnie. Cafe racer project bike
K75RTP - 1994
K75C - 1991 AKA Jim Beam. In boxes. 
K1100LT 1992 - AKA Big Red (gone)
K100LT - 1988 - AKA the Bullion brick. Should never have sold it.
    

RT

RT
Life time member
Life time member
Hi Renez
this is not recommended but I lost that bolt half way through my recent journey to Mordor and back, did about 1500 klm (1,000 ish miles) without it and the only problem was my fear the whole thing would fall apart. The roads were really bumpy too, so I guess I'm saying don't let it ground you completely meantime
Good Luck
RT

    

blaKey

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Hey RT, did you try using one of the bolts in your neck as a replacement... Twisted Evil


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Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

charlie99

charlie99
VIP
VIP
blakey wrote:Hey RT, did you try using one of the bolts in your neck as a replacement... Twisted Evil

No mercy.......... I think I'm in the shit! 44271 too funny blakey ...sorry had to laugh bob ...


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

RT

RT
Life time member
Life time member
Sorry Renez I rattled a cage elsewhere and your thread was taken over, didn't mean to take away from your problem.
And Blakey, no I still have my head attached with 2 of the best screws that my missus could ask for, but the nuts have long rusted up.
RT

    

K75cster

K75cster
Life time member
Life time member
I dont see a bracket at all. So I shudder to say the washer I see must be whats left of the bracket. If that allen bolt comes out after heat is applied then it seems likely you would have to go visit a welding shop or muffler specialist and have then weld on something you can work with, one hopes it come loose soon


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

ReneZ

ReneZ
Life time member
Life time member
Thanks for the 'support' :bom: . I have a new bracket (they're readily available), but will need to get the bolt out first. As an engineer I could try to fabricate an other bracket, but that !"£$%^ bolt would still be there and I'm too anal to let it be. Only thing I can think of is trying to weld another bolt to it, but there's little space. Drilling it out would mean I would need to drop the crankcase (with the shaft, bearings etc.) to get the old bit out.

Other way would be to try to drill it out (no good access for a drill!) and then dril up to size and redrill/rethread the hole.............affraid

I think I'll try the welding bit with more heat first (bigger hammer?!)


__________________________________________________
Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland No mercy.......... I think I'm in the shit! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

sidecar paul

sidecar paul
Life time member
Life time member
Hi Rene,
I was looking at the offending screw on my RS today (without the bracket, of course) and I thought it might be possible to cut the head off the screw with something like a Dremel fitted with a small cutting disc. This might release the pressure on the screw and with the remainder of the broken bracket removed, you might be able to unscrew the rest of the screw by gripping the tiny projection.

My experience with these fixings is that they are usually quite free once the initial pressure has gone.
I know it's clutching at straws, but it might save a major strip.

Whatever you do, I hope you succeed,
Cheers,
Paul.


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'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015) 
....No CARS never ever!
    

K75cster

K75cster
Life time member
Life time member
I've used this method before on my old triumph, first heat up a bar with a screwdriver type end on it to cherry red then stick it in the slot. When the bar cools some to under any faint redness try to turn the screw. if nothing no worries but then go get a blow tourch the paint stripping type that runs on electricity heat up the casing where the bolt is then go get the real screwdriver out of the freezer and use it to sink the heat out of the bolt then try to turn the bolt. Warmed up and cooled down should crack the chemical weld, warming the cases should see the cases expand further then the bolt especially when its had a cold screwdriver shuved up its rear, failing that sort of home remedy its off to the muffler shop we go. might be worth a try


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

RT

RT
Life time member
Life time member
Can I ask the collective minds trying to solve this for Renez, if anyone knows what size this bolt is. I lost mine and have just bought a 6 mil and 8 mil useless replacement. Is it 7 mil? something I cannot buy over the counter I guess?
Cheers RT

    

Rick G

Rick G
admin
admin
It's a 6mm but not sure of the length. The only 7mm threads on a k bike are on the clutch


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"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 1999 K1100 LT with a Big Block 1200
    

ReneZ

ReneZ
Life time member
Life time member
Thanks Team, appreciate you being with me on this 'trip'!


__________________________________________________
Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland No mercy.......... I think I'm in the shit! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

Inge K.

Inge K.
VIP
VIP
RT wrote:Can I ask the collective minds trying to solve this for Renez, if anyone knows what size this bolt is. I lost mine and have just bought a 6 mil and 8 mil useless replacement. Is it 7 mil? something I cannot buy over the counter I guess?
Cheers RT

These screws is M6 x 25......could be 30 on this specific screw on the RT since the bracket is involved.

Since neither a M6 or M8 would fit......stripped threads?


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

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