BMW K bikes (Bricks)

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tinyspuds

tinyspuds
Silver member
Silver member
Good (insert time as appropriate) all,

I am getting down to the exciting bit of finishing the fuel related rubber bits replacement.



I knew the rubber would be leaky after itís 10 year stand in the open, but did the squirt carb cleaner at tickover test for before and after comparison. All pots reacted, from the plenum fitting to the crankcase flange, less so at number 4 and getting progressively worse up to number 1. So this wasnít really a surprise:




I got this far by detaching the 4 pairs of clamps below the plenum and then rotated the plenum left and towards the back. The front 2 inlets came off with the plenum, 3 and 4 stayed behind on the TBís.

This wasnít difficult but felt like there is probably a more elegant way to reinstall. I will also be replacing the manifold rubbers.

Q1. What is the recommended approach to reinstallation e.g. is it possible to assemble manifold through to plenum and reinstall as a unit?

Q2. I canít see any issues in the schematics but to be sure; is there any reason not to immerse throttle bodies and plenum chamber in degreaser †then carb cleaner?

Q3. A bit off piste but just came up. Obv. removing the throttle cable at the throttle end is straightforward atm. But would seem less so at the roadside with all the plastic and rubber back in place. My usual approach would be to create slack in the inner cable, grab it with pliers and free the nipple from the wheel. Not having much luck with that this a.m. - is there a trick/tip/technique?

Iím doing this job simultaneously with replacing radiator hoses, which will be the end of my ďI bought a KĒ journey for now. Hopefully I have done enough to keep her going until my last planned rally in November...
Cheers all,
Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LLís.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

Dai

Dai
Life time member
Life time member
Fit the inlets to the plenum, then swear badly as you try to line them all up onto the throttlebodies. Silicon grease helps a lot. Did you replace the manifolds below the throttlebodies? They have a habit of cracking too. If not (and you do replace them), roll the throttlebodies out of the inlets, then scrub as much of the shite off the engine as you can before releasing the manifolds. Refit (or replace) with a bit of Threebond between the manifold and the crankcase.

Don't see any problem with cleaning the throttlebodies that way.

As for the throttle cable... there ain't no easy way. I usually put as much slack in it as possible (i.e. release the bugger at the top), then lever the quadrant round. Most of the time this gives enough slack to get a pair of needlenose pliers onto the inner cable and wriggle the nipple out. When putting it back, you'll probably find that you have four miles of slack because the outer has jumped out of the socket at the top of the quadrant


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

duck

duck
Life time member
Life time member
Throttle cable attach/detach:

Open the throttles as much as possible and then stick a screwdriver in them to hold them open:


__________________________________________________
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
http://www.ClassicKBikes.com
    

tinyspuds

tinyspuds
Silver member
Silver member
Cheers Dai,
I have got replacement manifolds too (used/half price from Motorworks, excellent value, 3 look hardly used. Very pleased). Good tip on cleaning before removal, been thinking about how best to, but hadnít come up with that (Doh!)
Got a couple of days before my suzuki clamps arrive so time for a good clean.
Thanks, Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LLís.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

tinyspuds

tinyspuds
Silver member
Silver member
@duck wrote:Throttle cable attach/detach:

Open the throttles as much as possible and then stick a screwdriver in them to hold them open:

Thanks Duck. Tried that (successfully) this pm. Think Iíll need to
practice with everything reassembled - the chair stuffs visibilty.
Cheers, Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LLís.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

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