BMW K bikes (Bricks)


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1Back to top Go down   K100 Tanks Empty K100 Tanks Fri May 28, 2021 12:54 pm

DevilDesign

DevilDesign
active member
active member
Hello all! I am slowly learning more and more about these bikes. I have a 16v K100 and I need to get a tank for it, but have noticed that there seem to be two styles. One with the mounting points on the side and another with a single mounting point in the center. 

I also noticed that some of the tanks seem to have a access hole on the bottom center, and others seem to have some sort of plug on the bottom left. 

I am curious how interchangable these tanks are? I am not worried about the mounting points, as fabricating isn't a problem for me, but was more concerned with the difference in the other parts of the tanks.

Thank you all very much for your help!

    

2Back to top Go down   K100 Tanks Empty Re: K100 Tanks Fri May 28, 2021 1:14 pm

Arlina

Arlina
Moderator
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Not interchangable.

The old tank (83-84-85) had the middle mount, and plug on the bottom left is for a device wich should be a floater, and connection for the pump.
Later models (86 -> ) were different.


__________________________________________________
K100 Tanks Eu-log10  K1100RS/LT - R1200RT - R1100RS - Cagiva SST 350 Ala Verde - K75LT project - K75 Schurgers - K75S - K1100RS - K75RT - K75C
    

3Back to top Go down   K100 Tanks Empty Tank info Fri May 28, 2021 1:45 pm

Paddy1

Paddy1
Silver member
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+1 on Arlina’s comment.
the 83-84-85 tank I believe they changed mid year (85) production to the 86 and newer tank.
BTW The earlier vintage tank had the single hole mounting rear of tank and was prone to damage. 
check max bmw parts online catalog.
good luck!


__________________________________________________
Riding Beemers since 1988
1986 K100RT, 1985 K100RS, 
2001 K1200LT, 2004 R1100S, 
2004 R1150, 1980 R65, 
2014 Zero FX, 2021 Zero SR/F
    

4Back to top Go down   K100 Tanks Empty Re: K100 Tanks Fri May 28, 2021 1:51 pm

Paddy1

Paddy1
Silver member
Silver member
also... I believe the 16 valve were the newer models.


__________________________________________________
Riding Beemers since 1988
1986 K100RT, 1985 K100RS, 
2001 K1200LT, 2004 R1100S, 
2004 R1150, 1980 R65, 
2014 Zero FX, 2021 Zero SR/F
    

5Back to top Go down   K100 Tanks Empty Re: K100 Tanks Fri May 28, 2021 2:09 pm

92KK 84WW Olaf

avatar
Life time member
Life time member
The early tank that has the single bolt at the rear and the plug at front left is not interchangeable to the later tanks.

The clue is the earlier tank has 2 fuel lights, a red 4 litre and an orange 7 litre. The later tank has a singe red 5 litre fuel light.


__________________________________________________
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
    

6Back to top Go down   K100 Tanks Empty Re: K100 Tanks Fri May 28, 2021 2:36 pm

DevilDesign

DevilDesign
active member
active member
Alright! Thank you guys very much! Hopefully should have the majority of the major parts now!

    

7Back to top Go down   K100 Tanks Empty Re: K100 Tanks Fri May 28, 2021 2:53 pm

92KK 84WW Olaf

avatar
Life time member
Life time member
There is also I think a later change in the plug connection. I have a numbers of Ks and K1100 over different years and you just need to check the plug connector at the back of your clocks.


__________________________________________________
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
    

8Back to top Go down   K100 Tanks Empty Re: K100 Tanks Fri May 28, 2021 3:00 pm

Arlina

Arlina
Moderator
Moderator
Paddy1 wrote:also... I believe the 16 valve were the newer models.
Yes and no....
Yes, because the 16V models came later than the first series K, after 86.
Also the 16V tanks are in 4 different shapes.
The 86 and later tanks of the K75 and K100 2V are in 4 different shapes. Mostly to fit with the right fairing/panels.
The 83-84-85 tanks only were for the K100, 1 shape, K75 came later.


__________________________________________________
K100 Tanks Eu-log10  K1100RS/LT - R1200RT - R1100RS - Cagiva SST 350 Ala Verde - K75LT project - K75 Schurgers - K75S - K1100RS - K75RT - K75C
    

9Back to top Go down   K100 Tanks Empty Re: K100 Tanks Fri May 28, 2021 3:51 pm

Laitch

Laitch
Life time member
Life time member
DevilDesign wrote:I also noticed that some of the tanks seem to have a access hole on the bottom center, and others seem to have some sort of plug on the bottom left. 
A float-type fuel level sender is inserted through that "access hole". The sender's mounting plate that has wires through its center is bolted onto the tank at that point. Aftermarket replacements for that fuel level sender model are available.

Earlier fuel level senders were inserted through a hole in the floor of the tank's left side, near the fuel delivery and return ports, then coupled to the tank by means of a circular plastic nut that has wires through its center. That might be the "plug" you describe. Aftermarket replacements for that sender are not available.


__________________________________________________
1995 K75 90,000 miles
    

10Back to top Go down   K100 Tanks Empty Re: K100 Tanks Fri May 28, 2021 4:12 pm

DevilDesign

DevilDesign
active member
active member
Laitch wrote:
DevilDesign wrote:I also noticed that some of the tanks seem to have a access hole on the bottom center, and others seem to have some sort of plug on the bottom left. 
A float-type fuel level sender is inserted through that "access hole". The sender's mounting plate that has wires through its center is bolted onto the tank at that point. Aftermarket replacements for that fuel level sender model are available.

Earlier fuel level senders were inserted through a hole in the floor of the tank's left side, near the fuel delivery and return ports, then coupled to the tank by means of a circular plastic nut that has wires through its center. That might be the "plug" you describe. Aftermarket replacements for that sender are not available.

Thats exactly what I was wondering! Thank you very much. There is a lot of different varients of these bikes compared to the hondas I am used to!

    

11Back to top Go down   K100 Tanks Empty Re: K100 Tanks Sun Oct 15, 2023 9:46 am

Paddy1

Paddy1
Silver member
Silver member
one more thing… the early pre-mid 85’ design required a different pump designed screen filter installed below the pump inside the tank.
always use the bikes vin # when sourcing parts for the early K100rs


__________________________________________________
Riding Beemers since 1988
1986 K100RT, 1985 K100RS, 
2001 K1200LT, 2004 R1100S, 
2004 R1150, 1980 R65, 
2014 Zero FX, 2021 Zero SR/F
    

12Back to top Go down   K100 Tanks Empty Re: K100 Tanks Sun Oct 15, 2023 11:34 am

firstle

firstle
Life time member
Life time member
BMW K100 K75 Ignition Switch | eBay ....... this person has the tank and parts you need , i bought a frame and engine off him and he has the rest of the bike RS, great person to deal with for K parts which he is slowly listing

    

13Back to top Go down   K100 Tanks Empty Re: K100 Tanks Sun Oct 15, 2023 4:29 pm

Dai

Dai
Life time member
Life time member
Another thumbs up here for that seller. I've bought stuff off him too with absolutely no problems.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

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