BMW K bikes (Bricks)

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1Back to top Go down   K100 Petrol tank sizes ???? Empty K100 Petrol tank sizes ???? on Wed Nov 12, 2014 12:48 pm

jimmy62alan

jimmy62alan
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Having looked around for various parts for my Bike build and seen some awesome bikes it seems to me there are a number of differant tank sizes in the K series petrol tanks or should I go back to spec-savers and get my eyes tested again lol.
If I'm right could you telll me what model has the largest tank for my diesel k100 bike project.
cheers ALAN

    

2Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Nov 12, 2014 1:00 pm

92KK 84WW Olaf

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Not so much sizes as accessories, as far as I know. Some have rubber pads etc.

I researched one thing though, remove the battery from where it is and you can make a 5-6 litre tank to fit in that space, more if you lose the storage under the seat.. Move the fuel pump into it and have a removable panel at the side to access it. I works with the standard petrol tank and retains the flow and return spigots as they are.


__________________________________________________
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 36,188  miles
    

3Back to top Go down   K100 Petrol tank sizes ???? Empty K100 Petrol tank sizes ???? on Wed Nov 12, 2014 1:07 pm

jimmy62alan

jimmy62alan
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thats an interesting thought, I look into that if I can't find a bigger tank for the project. Cheers for the feedback.
ALAN

    

4Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Nov 12, 2014 4:06 pm

sidecar paul

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Alan, when your frame arrives, have a look as to how the tank fixes.

 Early tanks have a plate bolted across the frame with a single central threaded hole for the tank fixing.

Later tanks have two pegs that locate into rubber bushes which fit into lugs on the frame tubes. The pegs are then held with clips. 

Getting the right tank for your frame will save you some modification work.

Paul.


__________________________________________________
'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!
    

5Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Nov 12, 2014 4:11 pm

92KK 84WW Olaf

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Another thought, but may not apply in UK. We have classic rules that kick in at 30 years, so a 1984 or 1985 frame might be a good idea if these rules are of benefit to you........Our Road Fund reduces from €88 to €26.......

Not much Sidecar Paul doesn't know about K bikes.....you two should meet some time.


__________________________________________________
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 36,188  miles
    

6Back to top Go down   K100 Petrol tank sizes ???? Empty K100 Petrol tank sizes ???? on Wed Nov 12, 2014 4:20 pm

jimmy62alan

jimmy62alan
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The tank is in the garage Paul but the 2 lugs do ring a bell its a BMW K100RT 1985 frame if that helps, am I right in thinking there are differant size tanks or was I right about going to spec-savers lol.
ALAN
PS Paul I've just  sent an email to wasp about the wheels you mentioned.

    

7Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Nov 12, 2014 4:23 pm

92KK 84WW Olaf

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Alan

Can you get the number from the right hand side of the frame. The last 5 digits will do it, these can be matched to the date of manufacture and model type.


__________________________________________________
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 36,188  miles
    

8Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Nov 12, 2014 4:55 pm

sidecar paul

sidecar paul
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AFAIK, all the K100 tanks are nominally the same capacity.
Paul.


__________________________________________________
'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!
    

9Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Nov 12, 2014 5:41 pm

Two Wheels Better

Two Wheels Better
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You won't get much more than 22 litres (5.81 US gallons/4.83 Imp gallons) into a K100/K1100 tank and about 21 litres into a K75 tank.

There are aftermarket adapters available which raise the cap for an additional (approx.) 1 litre.

Why not buy an old tank, split it and alu-weld in a centre section?


__________________________________________________

Sometimes I lie awake at night, and I ask, "What can I do to keep my life from going by so fast?" Then a voice comes to me that says, "Try slowing down at the corners." 

~Charlie Brown

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '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-Polizei  - Beemers owned still or sold.

    

10Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Nov 12, 2014 7:36 pm

RicK G

RicK G
VIP
VIP
And there is always an exception the K100 basic of 1988era has the smaller K75c tank. About 3 litres smaller I seem to recall.


__________________________________________________
"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 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

11Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Thu Nov 13, 2014 1:05 am

Two Wheels Better

Two Wheels Better
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@RicK G wrote:And there is always an exception the K100 basic of 1988 era has the smaller K75c tank. About 3 litres smaller I seem to recall.
That 'basic' K100 tank, which is from a model that was never sold in the US, is the same as the K75 tank with 21 litres capacity.


__________________________________________________

Sometimes I lie awake at night, and I ask, "What can I do to keep my life from going by so fast?" Then a voice comes to me that says, "Try slowing down at the corners." 

~Charlie Brown

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '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-Polizei  - Beemers owned still or sold.

    

12Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Thu Nov 13, 2014 5:50 am

jimmy62alan

jimmy62alan
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@92KK 84WW Olaf wrote:Alan

Can you get the number from the right hand side of the frame. The last 5 digits will do it, these can be matched to the date of manufacture and model type.
I've sent you an inbox message.
ALAN

    

13Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Thu Nov 13, 2014 11:31 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Go HERE and type in the last seven digits of the VIN for model, intended market, year and production date.


__________________________________________________

Sometimes I lie awake at night, and I ask, "What can I do to keep my life from going by so fast?" Then a voice comes to me that says, "Try slowing down at the corners." 

~Charlie Brown

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '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-Polizei  - Beemers owned still or sold.

    

14Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Thu Nov 13, 2014 1:21 pm

92KK 84WW Olaf

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@Two Wheels Better wrote:Go HERE and type in the last seven digits of the VIN for model, intended market, year and production date.

If you have five or 6 digits enter it with one or two zeros first.....


__________________________________________________
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 36,188  miles
    

15Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Thu Nov 13, 2014 4:14 pm

jimmy62alan

jimmy62alan
active member
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@Two Wheels Better wrote:You won't get much more than 22 litres (5.81 US gallons/4.83 Imp gallons) into a K100/K1100 tank and about 21 litres into a K75 tank.

There are aftermarket adapters available which raise the cap for an additional (approx.) 1 litre.

Why not buy an old tank, split it and alu-weld in a centre section?
As you said TWB the 22ltr's and an a adapter will be my maximim size. If I go for the K100/K1100 tank and get the adapter at a later stage, I hope I have not been to much of a pain about the tanks lads lol
thanks for your patients
ALAN

    

16Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Dec 10, 2014 3:31 am

Fentible

Fentible
Silver member
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@sidecar paul wrote:Alan, when your frame arrives, have a look as to how the tank fixes.

 Early tanks have a plate bolted across the frame with a single central threaded hole for the tank fixing.

Later tanks have two pegs that locate into rubber bushes which fit into lugs on the frame tubes. The pegs are then held with clips. 

Getting the right tank for your frame will save you some modification work.

Paul.

Sorry to jump this thread, what year did the tank fitting change on??

    

17Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Dec 10, 2014 3:46 am

92KK 84WW Olaf

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I think that change was after August 1985. When K75 came on the market.


__________________________________________________
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 36,188  miles
    

18Back to top Go down   K100 Petrol tank sizes ???? Empty Re: K100 Petrol tank sizes ???? on Wed Dec 10, 2014 4:18 pm

Fentible

Fentible
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Thanks for that Olaf.

Fent

    

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