BMW K bikes (Bricks)

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1Back to top Go down    My 1991 K100-RS on Sun Sep 16, 2012 8:24 am

UK_Kev

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Ok let me start with a picture and a little info, for those that missed my intro in the new member thread...

Here is my first K series bike, I bought it at a bike jumble, in an unknown condition, brave maybe, stupid, we shall see. It has 110k on the clock, it has been off the road but garaged for thirteen years, it has an MoT, it runs, and it all seems to work, except maybe the fuel gauge?

Here is my introduction from the new member thread...

Yesterday I bought my first K bike, I bought it from a bike jumble, (a jumble is our UK version of your flea market), on sight, never heard it run, just took a chance. today it was delivered to my house, and I have spent the day cleaning, adjusting, and getting it going. well it was delivered today, so my first chance to really get to see what I bought, and as you can see it is a stunner.
Sure there a couple of small items that will need sorting, Rear indicators, weeping master cylinder, being the most urgent at this time, it also smokes quite badly when it starts, but that soon dissapears when warm, I have heard this is quite common though, although I am not sure to what extent.




So that brings us all up to speed.

Today I once again pulled the bike out of the lock up, the master cylinder is weeping quite badly, I pre-empted this by wrapping some cloth around the master cylinder and brake leaver, so none of the brake fluid has reached the painted area of the tank or fairing. I need to look at how you get the assembly apart, and get the leaver off, ready to do a rebuild, any help in this from those who have done it would be nice.

Next I added some redex to the fuel in the tank, to give the injector system a clean up, and here I have some good news, on starting the bike this time I had NO smoke, so maybe the initial smoking was caused by the long term standing, maybe the original owner oiled the bores before laying the bike up, who knows, but it only had a light whisp of smoke from where I used the choke to start the bike once warm it ran clean.

My next job of the morning was to try to remove the loose fitting belly pan, this turned into a full on job, as someone had managed to cross thread one of the four outer mounting bolts, ripping away the pressed in nutsert from the mounting frame. After an enormous amount of swearing, I manged to drop the frame with the belly pan attached, and was finally able to get the bolt out of the loose nutsert. I shall have a new nut welded on the frame this week, I will also get a spot of weld attached to the other nutserts. But at least while this was all free I was able to degrease and clean the motor in this area.

So that is my update for this week, just a couple of pictures to finish off with, My K100 and Z1b.





Last edited by UK_Kev on Sun Sep 16, 2012 8:35 am; edited 1 time in total (Reason for editing : Bad Spelling due to lack of education)


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1954 - Norton (Manx) Project - 1974 Z1b - 1983 R80ST - 1991 K100RS - 1993 Enfield Bullet
    

2Back to top Go down    Re: My 1991 K100-RS on Sun Sep 16, 2012 8:30 am

charlie99

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stunning bikes ...both kev...thanks for the update and images


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

3Back to top Go down    Re: My 1991 K100-RS on Sun Sep 16, 2012 9:06 am

Inge K.

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@UK_Kev wrote:Today I once again pulled the bike out of the lock up, the master cylinder is weeping quite badly, I pre-empted this by wrapping some cloth around the master cylinder and brake leaver, so none of the brake fluid has reached the painted area of the tank or fairing. I need to look at how you get the assembly apart, and get the leaver off, ready to do a rebuild, any help in this from those who have done it would be nice.

Reply #9 in this thread.

Reply #2, link #1 in this thread.

I think all the info needed is included in these threads.
But if it is any details you want to know more about, just ask. Very Happy


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

4Back to top Go down    Re: My 1991 K100-RS on Sun Sep 16, 2012 9:21 am

UK_Kev

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I would like to see a parts diagram showing what needs undoing, and how you remove the master cylinder from the bars. There are lots of screws on the M/C some with red paint on them, I am not sure which ones do what at this time?


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1954 - Norton (Manx) Project - 1974 Z1b - 1983 R80ST - 1991 K100RS - 1993 Enfield Bullet
    

5Back to top Go down    Re: My 1991 K100-RS on Sun Sep 16, 2012 9:32 am

Inge K.

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You don`t need to remove the MC from the bars, it`s then more work and parts involved.

I`ll see what info I find on this............


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

6Back to top Go down    Re: My 1991 K100-RS on Sun Sep 16, 2012 9:55 am

92KK 84WW Olaf

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I have this morning put up a post somewhere else for this.

Thats a very early Kawasaki 900 Z1......single disc didnt last long. Stunning bike too. I had an 8 x 4 foot poster of one of those on my wall for years! My inside leg was too short to ride one.

92KK


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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 82,800 miles
    

7Back to top Go down    Re: My 1991 K100-RS on Sun Sep 16, 2012 10:19 am

Inge K.

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Don`t know if this is readable.....................



I would add that it isn`t necessery to remove the tank to disconnect the brake light switch, remove the switch instead, two M3 screws.

But if you got heated grips, you still need to remove the tank to disconnect it.

You would also need new gaskets for the brake line.


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

8Back to top Go down    Re: My 1991 K100-RS on Sun Sep 16, 2012 10:21 am

RicK G

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Hmmm that Z1 is making me think its about time I started on the Z1300 and did the nut and bolt resto I've only owned it for 34 years. Since new.


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"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 for now
    

9Back to top Go down    Re: My 1991 K100-RS on Sun Sep 16, 2012 12:13 pm

UK_Kev

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Thanks for the info, I shall have a play when the new parts turn up...

Now let me ask about final drive grease, how important is the Moly content for this job? there are two different greases on ebay (well there are loads really) that have vastly different moly percentage

This one has 60%

http://www.ebay.co.uk/itm/AS60-60-Moly-Assembly-Paste-100grm-Similar-to-Honda-60-grease-/130755780342?pt=UK_Motorcycle_Parts&hash=item1e71a6def6

and this one has a much lower percentage at 2.9 to 3.1%

http://www.ebay.co.uk/itm/500-gram-CV-Joint-Molybdenum-GREASE-for-Constant-Velocity-Joints-on-drive-shaft-/130724065862?pt=LH_DefaultDomain_3&hash=item1e6fc2f246



Does it need to have the higher moly content on the drive splines?


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1954 - Norton (Manx) Project - 1974 Z1b - 1983 R80ST - 1991 K100RS - 1993 Enfield Bullet
    

10Back to top Go down    Re: My 1991 K100-RS on Sun Sep 16, 2012 2:39 pm

Inge K.

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No doubt, go for the high moly content.....the other one is useful on the throttle twistgrip only.


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

11Back to top Go down    Rear Indicators on Wed Sep 19, 2012 12:49 pm

UK_Kev

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I now have my ebay rear indicators, but alas they have no mounting hardware, so could some kind soul tell me how they are mounted to the frame, and what I need to get to do this Please.



Ok I have found what I need to order, I am missing the rubber gaskets, and all mounting screws, looks like a trip to BMW is called for then, this is the problem with ebay, when they say complete item, you have to wonder if it truly is!:suspect:



K


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1954 - Norton (Manx) Project - 1974 Z1b - 1983 R80ST - 1991 K100RS - 1993 Enfield Bullet
    

12Back to top Go down    Re: My 1991 K100-RS on Wed Sep 19, 2012 3:06 pm

MT350Explorer

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We have the same bike mate in spec and livery at least. Often get mistaken for the police at a distance - a good, bad or indifferent thing depending on your perspective! Very Happy Enjoy the fettling.
Cheers
Dave


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1991 K100 RS 16 valve
    

13Back to top Go down    Re: My 1991 K100-RS on Wed Sep 19, 2012 5:14 pm

sidecar paul

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These are the bits, Kev. The self-tapping screw is 30mm long.



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!
    

14Back to top Go down    After work on Thu Sep 20, 2012 5:00 pm

UK_Kev

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I managed to grab an hour on the bike after work today, and made a little progress, before it started to get dark, you really notice the evenings closing in now, soon I will only have the weekends to do anything, as I have no light or power at the lockup.

First job was to refit the newly repaired and painted belly pan frame, and then put the belly pan back on, this is now so much better, having all the fixings in the right place and working.

Next I set to sorting out the master cylinder, first I drained out the old fluid, and then cleaned the resevoir of all the dirt, and jelly type stuff from the site glass area.



Then following the advice I have been given, I removed the switch gear, I cleaned the switches with contact cleaner, then removed the brake lever, and the small grub screw from the far side (why do they put red paint on that screw?) I played with getting the piston out, this was a lot tougher than I thought it would be, but I finaly got the thing out,



pretty clean in the tube, with just a couple of bits of hard enamel to clean off. but as you can see, no real corrosion.



Do you think this is re-useable?







bounce


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1954 - Norton (Manx) Project - 1974 Z1b - 1983 R80ST - 1991 K100RS - 1993 Enfield Bullet
    

15Back to top Go down    Re: My 1991 K100-RS on Thu Sep 20, 2012 5:19 pm

sidecar paul

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The seal edges look slightly feathered, Kev. It might be OK but as you've got it out and because it may have been the cause of the leak, I don't think I would re-use it.

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!
    

16Back to top Go down    Re: My 1991 K100-RS on Thu Sep 20, 2012 6:41 pm

Inge K.

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When working in the bore, tie up the brake switch lever.

Some have found out that they need a new brake light switch,
before they have been finished with the work in the bore.



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

17Back to top Go down    Re: My 1991 K100-RS on Sat Sep 22, 2012 4:30 pm

K-BIKE


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Good on you Kev,
Great work! What I would suggest is get one of those sealed lead acid batteries (12 volt 6 amp hour) and put in one or two 12 volt fluoros or 12 volt LED lights in the lock-up and take the 12 volt battery with you each time you go to the lock-up and then you can work on the bike with some light for quite a while after dark. Then take the sealed battery back home and pop it onto a trickle charger to top it back up and it is ready for your next trip to the lock-up. I say two lights because you can mount them up so they avoid you casting a shadow when you are working and that makes it easier to work.

Definitely always go for a rebuild kit when you are pulling an old M/C down it is too much of a PITA to reuse old bits and have to go back in and rebuild again if it leaks.

When you come to refill take plastic sheet to cover the painted bits and an old towel to sit on top of that and mop up any spills or squirts of brake fluid. Take a water bottle for emergency wash down and disposable gloves so any brake fluid covered hands can be peeled clean and fresh gloves fitted, with brake fluid and paint definitely cleanliness is better than godliness.
Regards,
K-BIKE

    

18Back to top Go down    Re: My 1991 K100-RS on Sun Sep 23, 2012 10:32 am

UK_Kev

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On Saturday I went to the Kempton bike jumble, and while there, I picked up two small drill attachments to polish the bore of the master cylinder, one is made out of a red scouring pad, this removed the last of the enamel/corrosion from the bore, without damaging the bore, the other is a 18mm polishing head, I used this with some Belgom alloy polish to polish the bore, I then cleaned the bore of any residue with electrical contact cleaner. The result was a bore that looked like new.

The new rebuild seal kit arrived on Saturday while I was out, and so this morning I put the whole lot back together, I now have a fully functioning, and smoothe front brake lever, and more importantly, no leaks.

Polishing heads...



Thanks for the advice and help offered in this area.

Next item is the replacement rear indicators, as soon as I can get the gaskets and screws etc.



Last edited by UK_Kev on Mon Sep 24, 2012 2:44 pm; edited 2 times in total (Reason for editing : Added picture.)


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1954 - Norton (Manx) Project - 1974 Z1b - 1983 R80ST - 1991 K100RS - 1993 Enfield Bullet
    

19Back to top Go down    Re: My 1991 K100-RS on Sat Sep 29, 2012 12:36 pm

UK_Kev

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I rode it tody. first time it is certainly different, nice though


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1954 - Norton (Manx) Project - 1974 Z1b - 1983 R80ST - 1991 K100RS - 1993 Enfield Bullet
    

20Back to top Go down    Re: My 1991 K100-RS on Sat Sep 29, 2012 1:09 pm

Inge K.

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Congrats, with the first ride.


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Inge K.
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21Back to top Go down    Re: My 1991 K100-RS on Sat Sep 29, 2012 4:46 pm

K-BIKE


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Well done good work on the brakes, overall in the pics the bike looks good and should give you lots of fun.
Regards,
K-BIKE

    

22Back to top Go down    Another day, another problem... on Wed Oct 03, 2012 3:52 pm

UK_Kev

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I have a very slight weep around the brake master cylinder sight glass, any idea's how to cure this?


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1954 - Norton (Manx) Project - 1974 Z1b - 1983 R80ST - 1991 K100RS - 1993 Enfield Bullet
    

23Back to top Go down    Re: My 1991 K100-RS on Thu Oct 04, 2012 2:23 am

Inge K.

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The sight glas isn`t available as a single part..................

Drake Smith aka. Flying Duck solved this problem by removing the glas, mask off the inside and fill the hole with clear epoxy.

Of course with the MC removed from the bike.


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

24Back to top Go down    Re: My 1991 K100-RS on Thu Oct 04, 2012 2:54 pm

BIG D

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Cool

Great bikes Kev, hope you sort out the minor problems easy, its a great looking K and the Z looks good too had one of those myself many many moons ago just found my original Kawasaki workshop manual the other day up in the attic thanks for sharing the pic's.



BIG D

    

25Back to top Go down    Re: My 1991 K100-RS on Tue Oct 03, 2017 6:45 pm

Garyk100

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@Inge K. wrote:The sight glas isn`t available as a single part..................

Drake Smith aka. Flying Duck solved this problem by removing the glas, mask off the inside and fill the hole with clear epoxy.

Of course with the MC removed from the bike.
The sight glass on my k11 is leaking, as they are now over $700 for a new m/cyl, I have read a few posts, what is the best way to fix this problem read somewhere about using black silicone, clear epoxy? Is that the same as 2 part araldite! Cheers


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1991 K100rs16v
1993 K1100LT
    

26Back to top Go down    Re: My 1991 K100-RS on Tue Oct 03, 2017 11:09 pm

RicK G

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I think it was RossKKo who used some black RTV silicone but unless you have a oija board we cant ask him.
The thread would probably be about 2 1/2 years back.


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"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 for now
    

27Back to top Go down    Re: My 1991 K100-RS on Tue Oct 03, 2017 11:29 pm

Garyk100

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Thanks Rick, I will have a look, brake fluid as you know eats anything, the hose to the splitter on my k100 leaked all over the back of the front guard and bellypan, did not notice till it was too late, cheers


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The early bird catches the worm, but the second mouse gets the cheese

1991 K100rs16v
1993 K1100LT
    

28Back to top Go down    Re: My 1991 K100-RS on Wed Oct 04, 2017 5:06 am

Gaz

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Rick G, you're right about Rosskko using black silicon to bog up the hole where the sight glass fits in the master cylinder.
He did it to go to his last Alpine Rally with you & I, all on our K1100s. Picture to refresh our memories.


Last time that I saw Smurfette, now in Ed's possession, the black silicon was still holding up.

I'm sure I have read somewhere that a sight glass from another brand (I think Honda) can be successfully fitted to our master cylinders. I'll do more research.

Cheers


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Gaz
95 K1100LT 0232224; 90 K75 6427509; 87 R80G/S PD 6292136
    

29Back to top Go down    Re: My 1991 K100-RS on Wed Oct 04, 2017 6:28 am

Garyk100

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That would be great if the Honda one fits, there would be a lot of 16v owners who would be interested, cheers


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The early bird catches the worm, but the second mouse gets the cheese

1991 K100rs16v
1993 K1100LT
    

30Back to top Go down    Re: My 1991 K100-RS on Wed Oct 04, 2017 7:08 am

Gaz

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Gary, have a look at this link. Motorworks has the O ring seal for the sight glass which may be all you need.

K1100 master cylinder sight glass O ring

Look for part number BRA 11143

Cheers


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Gaz
95 K1100LT 0232224; 90 K75 6427509; 87 R80G/S PD 6292136
    

31Back to top Go down    Re: My 1991 K100-RS on Wed Oct 04, 2017 7:17 am

Garyk100

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Yeah I have a few things on order from there, spotted the oring yesterday, but would like to have a backup window in case I break it on the way out, thanks


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The early bird catches the worm, but the second mouse gets the cheese

1991 K100rs16v
1993 K1100LT
    

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