BMW K bikes (Bricks)

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TheJoker

TheJoker
Silver member
Silver member
I'm considering swapping everything from one K bike onto another. Basically the project bike has come the engine starts however this needs a lot of work all over.

Now I've got an rs that's an 89 at the moment I'm looking for reasons to justify me having 3 bikes. Can't see it but can see me storing a k. So I'm wondering if it would be possible to switch everything bar the fairing (that would be sold), onto the 1984.

The reason for swapping is I've already got an 84 bike and I know for definite that everything is the same on both bikes; no modifications not in the slightest.

That way I could store the 84 engine on the 89 frame to sort out at a later date. However has anyone done similar before and how much time did it take ?

I know that on K's it's easier to remove the frame from the engine instead of the opposite way around.


__________________________________________________
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
    

Stan

Stan
Life time member
Life time member
In 1985 a number of changes took place. Same include, different tank, side panels, ducktail, seat, footpegs, brackets for footpegs. The Fuel level sender unit was different  and the instruments had a 4/7 litre fuel left light to a single warning lamp. Not sure about all the wiring.
Good luck.


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1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

Laitch

Laitch
Life time member
Life time member
@TheJoker wrote:I know that on K's it's easier to remove the frame from the engine instead of the opposite way around.
 Swapping everything from an 1989 to an 1984 k100. 610153


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1995 K75 81,000 miles
Swapping everything from an 1989 to an 1984 k100. Usa-lo10
    

charlie99

charlie99
VIP
VIP
there are some silly things that changed on the swap from 84 to 86 and on

like the gpi cable connections  at the right hand sidecover , likewise some others as well

but shouldn't be too much of an issue ,  just swap the sensor from the old bike , clean them up and replace onto the new engine transmission ???

renew seals and rebuild of those bits could mean they they give good service life into the future ...

you may also get the benefit of the newer (metallurgy ) valve seats etc inside the newer motor with the swap over

good luck


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OSwapping everything from an 1989 to an 1984 k100. 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 ..
    

Dai

Dai
Life time member
Life time member
Wiring loom is different because of the changes to the fuel level sender.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

Suzi Q

Suzi Q
Life time member
Life time member
Slightly off topic (and no help to you whatsoever, sorry) but, well, have you found yourself considering having two bikes the 'same'. One MOT, one lot of insurance, y'know...

Hey you can only ride one at once, I'm only sat here thinking...

I'll get me coat.


One of the things to watch is the fuel tank rear mountings - the lugs on the frame changed at some point so you have to match 'early tank-early frame' etc.

    

Inge K.

Inge K.
VIP
VIP
@Dai wrote:Wiring loom is different because of the changes to the fuel level sender.

....and a whole lot of connectors for this and that.....almost all of the 3-4 pins.


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

92KK 84WW Olaf

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Life time member
Clocks changed too.......

List is endless. I have 84RT and 92LT and don't see much interchangeability on electrical items apart from bulbs. I think you will need to look at a lot of sensors and switches from the engine being changed back to the earlier ones to match the earlier loom. A useful tool would be to look at Motorworks website and see when you click on an item what year each one is good for. They give quite good indications.


__________________________________________________
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 37,190 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
    

TheJoker

TheJoker
Silver member
Silver member
Thank you for the replies everyone. I've got a working tank and two spare looms for an 84. The main reason for the switch over is I know the fuel injectors on the 89 are in great condition; however on tthe 84 they look rather iffy. Fairings won't be a concern as they aren't going onto the 84. They will be sold off or kept for a later date to be sold off. The 89 would then be broken down into spare parts.

Note I won't be doing anything to the 89 bike just yet as it's my daily hack whilst I sort the 3rd K out.

Oh and to the comment yes I have thought about it before one mot one tax etc. Just wondering what would happen if stopped and they decide to check the frame numbers. Unlikely but you never know.


This is the 89 that would be used.
Swapping everything from an 1989 to an 1984 k100. 2hkOo64

This is the 1984 that I'd be switching parts over to.

Swapping everything from an 1989 to an 1984 k100. UZsVP4T

This is the fuel rail that doesn't fill me with much trust.

Swapping everything from an 1989 to an 1984 k100. QbXC0RZ

Kind Regards,
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
    

92KK 84WW Olaf

avatar
Life time member
Life time member
Injectors and rail are an easy change. No way does that warrant an engine change.


__________________________________________________
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 37,190 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
    

TheJoker

TheJoker
Silver member
Silver member
@92KK 84WW Olaf wrote:Injectors and rail are an easy change. No way does that warrant an engine change.
It's one thing I've never messed with and the worry is I'd screw it up. The red K is going to be a cafe racer with homage to ww1 and 2 fighter pilots without altering the frame.


__________________________________________________
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
    

92KK 84WW Olaf

avatar
Life time member
Life time member
All you need to hand are new seals, but also get a replacement rail that will pop in. If you have spare injectors its a fairly quick change over.


__________________________________________________
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 37,190 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
    

Born Again Eccentric

Born Again Eccentric
Life time member
Life time member
chris846 wrote:Slightly off topic (and no help to you whatsoever, sorry) but, well, have you found yourself considering having two bikes the 'same'. One MOT, one lot of insurance, y'know...

Hey you can only ride one at once, I'm only sat here thinking...

What a Face Go hang your head in shame for suggesting such a heinous act!!


@TheJoker wrote:Oh and to the comment yes I have thought about it before one mot one tax etc. Just wondering what would happen if stopped and they decide to check the frame numbers. Unlikely but you never know.

I have noticed that the MoT tester specifically checks the VIN stamped on the frame with the MoT docs on-line to ensure that the MoT is recorded for that bike frame and registration number.

If you had two similar looking bikes and just swapped the number plate over onto the one you were riding (to save MoT cost, insurance etc.), as far as traffic cameras and ANPR (automatic number plate recognition) goes, you would be OK as they only check that the number plate is associated with a valid MoT and tax. However, if you were stopped by the police (for any reason), if you are on the wrong bike you are in for a world of pain (and cost). The police would do you for no insurance (seize the bike and you pay storage costs until recovered and pay £150 for the pleasure of them looking after it as well as 6 points on your licence) and no MoT. Big fines on top of storage charges! They would also do you for using the wrong registration plates. Worse still (and more likely), if you had an accident then, on the wrong bike, you would be clobbered with all of the above police stuff and, without insurance, would be well an truly stuffed - even if the accident wasn't your fault. 

You never know when you might be about to regret it!


£29 for MoT and £85 for road tax per bike is worth if for the peace of mind and multibike insurance is not much more than insuring a single bike (much cheaper than insuring two bikes separately on their own policies).


__________________________________________________
Swapping everything from an 1989 to an 1984 k100. Uk-log10 Swapping everything from an 1989 to an 1984 k100. Sco-lo15
                              Paul  Swapping everything from an 1989 to an 1984 k100. 905546712

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurance write-off rebuild Feb 17
"Donor" K100LT 1990 (Red)  (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike).   June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

92KK 84WW Olaf

avatar
Life time member
Life time member
£0 for MOT and £22 road tax for my K100RT.
£0 for MOT and £70 road tax for my K1100LT.

Brexit might not be so bad after all.

I knew a guy years back had 2 cars on the one reg plate. Funny, apart from being same colour they had the same chassis and engine nos as well. Had to do with a 35% tax and more on them.


As for the near miss, do you ever get the feeling of invisibility?


__________________________________________________
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 37,190 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
    

BobT

BobT
Life time member
Life time member
I am with BAE on this one, It is ar$eholes who break the law to save a few quid that put costs up for everyone else, I feel sorry for the person that you get involved in an accident with as they will have a crap job trying to get their pride and joy repaired after meeting you on the road.
Put your hand in your pocket and do things properly, you would soon moan if an uninsured driver hit you. Evil or Very Mad

    

BobT

BobT
Life time member
Life time member
And thanks for warning us of what you intend to do, and on the web too!
I have an mate who is a copper in the Stoke area and he will make sure that any K100s that are spotted on the road will be checked. He thought that your posts are an interesting read.

    

TheJoker

TheJoker
Silver member
Silver member
@BobT wrote:And thanks for warning us of what you intend to do, and on the web too!
I have an mate who is a copper in the Stoke area and he will make sure that any K100s that are spotted on the road will be checked. He thought that your posts are an interesting read.
Just to inform you it's never cool to bring police into anything bike related. That doesn't matter who you are or social standing. Police aren't much use anyway regarding bike crime and I would trust a baseball bat or rock thrown at a bike thief whilst riding; more than I would of police doing there job and catching them.

I'll admit I'm curious by it however I've already got two k100's on the road and both of them have tax, mot and insurance. If I had gone down the route that the previous person mentioned I would have done it with them two.

This was 11th november 2016 below when a car turned right in front of me. No one has to warn me the dangers of being invisible on the road. Personally I know the pain that comes along with it.

Swapping everything from an 1989 to an 1984 k100. M85iH0C

The helmet that I was wearing this is a shoei neotec the visor was open before I crashed closed as I crashed and reopened after I had stopped rolling.

Swapping everything from an 1989 to an 1984 k100. CkU9ZEt

Kind Regards,
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
    

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