BMW K bikes (Bricks)

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1Back to top Go down   Throttle cable issue Empty Throttle cable issue Sun Aug 28, 2016 5:15 pm

TheJoker

TheJoker
Silver member
Silver member
Hello all, sorry to bother you but i'm having major problems on my k100 throttle cable. I've connected up the mechanism and greased the throttle wheel however their is no tension what so ever on the throttle cable. My k100 is 1984. Does this throttle cable look normal to you ?

Throttle cable issue RBINaYHl

Also included a picture of the housing has been greased with molly grease, to me it looks ok. Is there something I'm missing.

Throttle cable issue Wtln5eQ


Looking forward to replies,
Cheers sam.


__________________________________________________
My Bike List past to present so far;

Lexmoto (first bike ever to ride) , CB125 TDC 86 , CG125 89 , GN125 97 , ER5 96 , K100 RS 84

84/01 K100rs 0013627
    

2Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Sun Aug 28, 2016 5:23 pm

Inge K.

Inge K.
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On the throttle handle you have thin line marked up, close to the teeth.
You must align this with a arrow or line on the toothed wheel with the chain.


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

3Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Sun Aug 28, 2016 5:27 pm

TheJoker

TheJoker
Silver member
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@Inge K. wrote:On the throttle handle you have thin line marked up, close to the teeth.
You must align this with a arrow on the toothed wheel with the chain.

Yeah I've done this and tried it all the way around still doesn't want to spring back. It's like too much cable is in the housing, I've also adjusted the adjuster which is half way down the cable. Yet this still doesn't give any respite it seems.


__________________________________________________
My Bike List past to present so far;

Lexmoto (first bike ever to ride) , CB125 TDC 86 , CG125 89 , GN125 97 , ER5 96 , K100 RS 84

84/01 K100rs 0013627
    

4Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Sun Aug 28, 2016 5:31 pm

Inge K.

Inge K.
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That cable with the adjuster half way down is very old, maybe it's time for a new cable?
Is the cable smooth to operate?

It's the springs down at the throttlebodys that should pull the cable back, all of them is present and non broken?


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

5Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Sun Aug 28, 2016 5:42 pm

TheJoker

TheJoker
Silver member
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@Inge K. wrote:That cable with the adjuster half way down is very old, maybe it's time for a new cable?
Is the cable smooth to operate?

It's the springs down at the throttlebodys that should pull the cable back, all of them is present and non broken?

Can't seem to find a similar cable for the bike it's an 1984 k100 January model, didn't want to risk getting one that didn't fit. The cable is very smooth to operate and at the throttle body end it's all fine. If I take the cable out of the housing and just pull on the nip it springs back easily. I bet it's something really easy that I'm going to kick myself over as well.


__________________________________________________
My Bike List past to present so far;

Lexmoto (first bike ever to ride) , CB125 TDC 86 , CG125 89 , GN125 97 , ER5 96 , K100 RS 84

84/01 K100rs 0013627
    

6Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Sun Aug 28, 2016 5:47 pm

Inge K.

Inge K.
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Only a later model cable is available nowadays, then you you also must change the lower bracket and a few other small parts.

Have a look at this: http://technik.flyingbrick.de/images/2/25/Gaszug.pdf


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

7Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Sun Aug 28, 2016 8:40 pm

RicK G

RicK G
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There is no spring return mechanism at the handlebar, the cable must be connected to the throttle body before it will self return.


__________________________________________________
"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, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

8Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 6:35 am

charlie99

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perhaps you could look at the throttle bodies end of the cable ...the bracket off the rear of throttle bodies (that retains the cable )  from memory has a plastic adaptor ...I noted that my bracket had bent somewhat ...which in turn lets the cable go through the outer far too far to get the mechanism to work properly ...a good rebend of that bracket especially the tongue that hold the bracket  at the right angle  got me another 10 mm of cable pulled through the liner ...letting the chain - bevel drive working heaps better

Throttle cable issue Thrott10

good luck


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OThrottle cable issue Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

9Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 8:41 am

duck

duck
Life time member
Life time member
It also helps if you lubricate the gears in the throttle perch with spray silicone instead of gooey grease. I've done this to my K bikes and the throttle return is much better that way.


__________________________________________________
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
    

10Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 10:27 am

TheJoker

TheJoker
Silver member
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I found the problem but I think a new cable is the only solution if you look at the image below there is a bolt that is threaded into the throttle housing. My bike doesn't have this at the moment. Not sure if I'd be able to get one either. I've got an idea that this will take up the rest of the slack, to get the throttle working correctly.

Throttle cable issue Index.php?action=dlattach;topic=7403


__________________________________________________
My Bike List past to present so far;

Lexmoto (first bike ever to ride) , CB125 TDC 86 , CG125 89 , GN125 97 , ER5 96 , K100 RS 84

84/01 K100rs 0013627
    

11Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 11:11 am

Inge K.

Inge K.
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@TheJoker wrote: if you look at the image below there is a bolt that is threaded into the throttle housing. My bike doesn't have this at the moment.

That part isn't used together with the cable you have, it's used on later versions.


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

12Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 11:49 am

TheJoker

TheJoker
Silver member
Silver member
@Inge K. wrote:
@TheJoker wrote: if you look at the image below there is a bolt that is threaded into the throttle housing. My bike doesn't have this at the moment.

That part isn't used together with the cable you have, it's used on later versions.
 Damn so that isn't the part I'm missing then. My cable is most probably normal then. I've checked the route of the cable and can't seem any other problems.


__________________________________________________
My Bike List past to present so far;

Lexmoto (first bike ever to ride) , CB125 TDC 86 , CG125 89 , GN125 97 , ER5 96 , K100 RS 84

84/01 K100rs 0013627
    

13Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 12:37 pm

kennybob

kennybob
Silver member
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Isn't there a screw adjuster in your cable shown in the first post--that metal block that fits into the rubber boot in the middle of the cable.  That would take the slack out of the cable.

from bmw MOA post:
There were three mods that I know of to the K bike cables. The first had the adjuster about 12" down from the throttle. The second had a metal end at the bottom and the adjuster at the throttle on the bars. The third has a plastic bushing down at the bottom (and a different bracket), with the adjuster at the top as on the second one. The reason for the plastic bushing was to keep the cable sheath from becoming a secondary ground for the rubber mounted bars. This is the only one BMW now sells..

    

14Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 1:57 pm

TheJoker

TheJoker
Silver member
Silver member
@kennybob wrote:Isn't there a screw adjuster in your cable shown in the first post--that metal block that fits into the rubber boot in the middle of the cable.  That would take the slack out of the cable.

You would think it would take the slack but for some reason it doesn't I managed to get the bike started today by pulling on that part of the cable.


__________________________________________________
My Bike List past to present so far;

Lexmoto (first bike ever to ride) , CB125 TDC 86 , CG125 89 , GN125 97 , ER5 96 , K100 RS 84

84/01 K100rs 0013627
    

15Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 5:26 pm

Two Wheels Better

Two Wheels Better
Moderator
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You didn't misplace this plastic collar/guide by chance...?
Throttle cable issue Imag2813

It goes here between the split halves of the (early) front brake master cylinder and the lever perch and would surely mess up your cable's tension.
Throttle cable issue Imag2814

It's part number 32 72 1 451 622 and is about $5.00USD from zee dealer.


__________________________________________________

1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

16Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 7:02 pm

blaKey

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@Duck wrote:It also helps if you lubricate the gears in the throttle perch with spray silicone instead of gooey grease. I've done this to my K bikes and the throttle return is much better that way.

+100


__________________________________________________
Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

17Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 9:06 pm

TheJoker

TheJoker
Silver member
Silver member
@Two Wheels Better wrote:You didn't misplace this plastic collar/guide by chance...?
Throttle cable issue Imag2813

It goes here between the split halves of the (early) front brake master cylinder and the lever perch and would surely mess up your cable's tension.
Throttle cable issue Imag2814

It's part number 32 72 1 451 622 and is about $5.00USD from zee dealer.

That is the golden ticket right there, can't seem to find them in any of the uk dealers. I'll have to ring up tomorrow to have a nosy around. However I noticed yesterday that the actual boot further down the cable has a massive tear in it. With that being the case I think it might be worth in the end to try and replace it. I'd still need that part though hopefully I can find someone with it.


__________________________________________________
My Bike List past to present so far;

Lexmoto (first bike ever to ride) , CB125 TDC 86 , CG125 89 , GN125 97 , ER5 96 , K100 RS 84

84/01 K100rs 0013627
    

18Back to top Go down   Throttle cable issue Empty Re: Throttle cable issue Mon Aug 29, 2016 9:23 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Good to know there's a definitive fix. Keep in mind, with early cable replacement, you'll require the bracket at the TBs and ancillary bits. See the link further back in this thread. The original type cable is as they say, NLA. Unless you can source NOS. They've been updated for yonks. If the cable is in as good a nick as you say, why not just replace the rubber boot? Save a mass of headaches.


__________________________________________________

1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

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