K11 Owners Group

SugarHillCTD · Posted: Sun Sep 11, 2011 12:27 pm Post subject:

To add more fuel to this fire (or tank), I had a thought when Cathy and I were out for a ride yesterday.

As I was at a fuel stop and filling up with it on the centerstand. It occurred to me that even with the flapper and the silver insert removed (did it at HM IV) and filling right up to the tank opening, there still is air space remaining. (the "neck" is actually slightly below the top of the tank)

I wonder if BMW included this air space in their calculations? It isn't usable capacity, but it could be considered tank volume.
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

malcolmt · Posted: Wed Sep 14, 2011 2:20 pm Post subject:

Phil Marvin · Posted: Wed Sep 14, 2011 3:12 pm Post subject:

tibbe · Posted: Wed Oct 12, 2011 8:48 am Post subject:

Just curious what's the flapper and how to remove it.

Can be some distance between pertrol station in our country side.

SugarHillCTD · Posted: Wed Oct 12, 2011 9:35 am Post subject:

Open the fuel filler cap. Remove the 4 Phillips screws. Lift the entire assembly off the tank.

Turn the filler over and remove the 3 Phillips screws. Separate the assembly where you just removed the 3 screws. Put the flapper in the trash bin.

Reattach the filler cap to the tank. Done.
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

Shoganai · Posted: Wed Oct 12, 2011 11:48 am Post subject:

What SugarHill said.

Here's some pics. Scroll down.

http://k11og.org/forum/viewtopic.php?t=5777&postdays=0&postorder=asc&start=135

tibbe · Posted: Tue Oct 18, 2011 7:55 am Post subject:

Thanks
Now I know what should have been removed.
No wounder why I didn't understand what the flapper was, it was missing on my bike as I bought it.

BobZ(IL) · Posted: Tue Oct 18, 2011 9:27 pm Post subject:

I thought the flapper was a US spec device.
_________________
'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997

Live well, do good work, enjoy the ride.

drikko · Posted: Tue Oct 18, 2011 11:29 pm Post subject:

Definitely no flapper thingy on the bikes here in OZ.
_________________
K1100RS '97
Laverda RGS 1000 '84
Jim Young Trailer Sailer 5.7M WB

DISCLAIMER:- Anything I say may have been when I was drunk so please don't take it personally.

'Bigamy is having one wife/husband too many. Monogamy is the same.'
Oscar Wilde

robleyd · Posted: Wed Oct 19, 2011 3:33 am Post subject:

+1 for me - but I had wondered if that is because mine is a police spec bike. It has a few other oddities, not the least being a lack of headlight on-off switch.
_________________
David, owner of:
1996 K1100 LT

drikko · Posted: Wed Oct 19, 2011 3:41 am Post subject:

None of the OZ ones had a headlight on off switch as at that time having the headlight permanently on was part of ADR. I added one on when I added the relays for the headlight/driving light. Not sure what year this was taken out of ADR.
_________________
K1100RS '97
Laverda RGS 1000 '84
Jim Young Trailer Sailer 5.7M WB

DISCLAIMER:- Anything I say may have been when I was drunk so please don't take it personally.

'Bigamy is having one wife/husband too many. Monogamy is the same.'
Oscar Wilde

SugarHillCTD · Posted: Wed Oct 19, 2011 6:24 am Post subject:

The K100RS I bought last year didn't have the flapper but did have a silver funnel shape that was bolted under the filler.

But the bike does have a headlight off/on switch.

It is Canadian spec.
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

Phil Marvin · Posted: Wed Oct 19, 2011 8:10 am Post subject:

Hi, Robleyd,
I have an ex-police K75RTP. Here in the USA, the police bikes were, I think, the only ones which were imported WITH the headlight on/off switch. Of course, when the idiots added all the lights, siren, etc., they added a separate switch to turn on/off the lights. So although it came with the on/off switch, it was disabled and a different switch was added. I'm debating changing the switch on the RTP with the (non on/off) switch on my K75A/3 so I can turn the headlight off if I want to.
_________________
Ride Safe,
Phil Marvin in El Paso, TX
'94 K75A/3
'95 K75RTP

molerat · Posted: Fri Nov 07, 2014 10:33 pm Post subject:

Thought I would resurrect this thread due to my last trip and some of the comments found here being interesting. This is what I did today.

1. Ran tank almost dry, bike coughed to a stop.

2. Put 1.3 gallons in tank, book says this is when idiot light comes on. made note on where the needle is with this amount, surprisingly very high just and a half notches below half tank indication. Light has never come on this early usually comes on about half way down the red area.

3. Put 1.2 gallons in ( total for 2.5, roughly half a tank) once again surprised about where needle read, closer to 3/4 of tank on gauge.

4. Then put 2.5 gallons in to fill the tank and sure enough came to about quarter inch below lip (flapectomy completed.) gauge read full. could maybe put .3 more in but chose not to. books says capacity is 5.3.
I agree with other posters here closer to 5.

conclusion> even though gauge is not accurate most of time. it is when it counts, close to empty. On mine I figure max of 15 miles when light comes on, but I just use it as last resort.
I placed a sharpie mark on gauge with accurate reads i took.

Sorry for being long winded, thought some might find this interesting.
_________________
Brian

1995 K1100 LT
1952 HRD Vincent Black Shadow, Series C

rbm · Posted: Sat Nov 08, 2014 9:12 am Post subject:

molerat,

It is possible to adjust the point where the reserve light comes on. That adjustment is within the float assembly itself. The float assembly consists of two circuit cards, one of which has a resistive wire (which drives your fuel gauge) and the other a copper contact pad (which activates the reserve light on the instrument pod). The copper pad card pivots and is adjustable -- able to rotate on the pivot. Rotating the card with a small screwdriver will cause the light to come on earlier (larger reserve) or later (smaller reserve). To make the adjustment, you'd have to remove the float assembly from the tank.

Learn more from this thread ( http://www.k100-forum.com/t3349-testing-in-tank-fuel-sender-unit#76423 )
_________________
- Robert
1987 K75 @k75retro.blogspot.ca
2011 Moto Guzzi V7 Racer

KYO · Joined: 09 Dec 2014 Posts: 11 Location: Co Durham UK

The hand book I have for my 98' K1100LT says (in two seperate sections) that the tank of a K1100 is 22 ltrs and the other 19 litrs. If BMW cannot get it right (or proof read for typos) then who knows for certain.

However I know it holds more than my K75s which took just under 21lt when I filled it following a tank re-spray. The Baglux tankbag harness for the K75s wont fit the K1100 as it is too small. (The handbook for the smaller bike quotes 21lt)

No one has mentioned the fact that the fuel level sensor, fuel pump and fuel filter and associated pipework inside the tank will all take up space and stop the max amount fuel from being filled.

As a matter of interest when the level warning light came on I filled up shortly afterwards and was able to put in just under 18 litres
_________________
So many roads - so little time - and the weather is bad!

K1100LT 1998 and K75S 1986