BMW K bikes (Bricks)

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1Back to top Go down   Opening a petrol tank cap  Empty Opening a petrol tank cap on Fri Aug 21, 2020 11:38 am

sidecar paul

sidecar paul
Life time member
Life time member
There's been a post recently about not being able to open a petrol tank cap.

So here's a reminder from 2015 of how to do it: it's also a good idea to to drill the hole BEFORE you get into an awkward position at a petrol station.

https://www.k100-forum.com/t9469-open-a-petrol-tank-cap-which-has-a-broken-lock

One reason for this sort of failure is that the plastic opening cam wears away so that there is nothing for the two pins on the lock barrel to grip the cam.

Here's a way to repair (improve?) the plastic cam.

Opening a petrol tank cap  Sam_1517


Opening a petrol tank cap  Sam_1514

Opening a petrol tank cap  Sam_1515

Opening a petrol tank cap  Sam_1516


Both my K's have had this mod and have the holes drilled in the caps; better safe than sorry.

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!
    

2Back to top Go down   Opening a petrol tank cap  Empty Re: Opening a petrol tank cap on Fri Aug 21, 2020 12:04 pm

brickrider2

brickrider2
Life time member
Life time member
Thanks for that, Paul.  Very Happy   cheers  Any chance you would be willing to produce these for sale?


__________________________________________________
1996 K1100LT
    

3Back to top Go down   Opening a petrol tank cap  Empty Re: Opening a petrol tank cap on Wed Sep 02, 2020 9:11 am

charlie99

charlie99
VIP
VIP
fantastic solve yet again Paul 
ill be needing one before too long , poor old Gerty has been a bit dodgy on the fuel cap opening for quite a few years , but with some lubrication has done the job .

issue is that the dowels out of the key mechanism is missing one side , i really should pin the missing one ...

great reminder to get on with the job before it all falls in a big heap


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OOpening a petrol tank cap  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 ..
    

4Back to top Go down   Opening a petrol tank cap  Empty Re: Opening a petrol tank cap on Wed Sep 02, 2020 3:25 pm

MartinW

MartinW
Life time member
Life time member
Charlie I had to replace one of my pins on the back of the tumblers. It worked well except that in doing so I drilled through the detent wafer that has to be pushed in when removing the lock. I've got too many projects on at the moment but I might have a crack at the Guild in making Pauls brass modification when time eases up. 
Regards Martin.


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K75s Hybrid
    

5Back to top Go down   Opening a petrol tank cap  Empty Re: Opening a petrol tank cap on Wed Sep 02, 2020 9:37 pm

DeanG

DeanG
active member
active member
Great! Is this something else I have to worry about? My 1985 k100 RS has 55,000 miles and the fuel cap seems to work just fine should I go ahead and drill holes in it?

    

6Back to top Go down   Opening a petrol tank cap  Empty Re: Opening a petrol tank cap on Thu Sep 03, 2020 7:13 am

92KK 84WW Olaf

avatar
Life time member
Life time member
@DeanG wrote:Great! Is this something else I have to worry about? My 1985 k100 RS has 55,000 miles and the fuel cap seems to work just fine should I go ahead and drill holes in it?
Its one 3.2mm hole, do it and put a grub screw or grommet in it. That's assuming your K does not have the early push down to open fuel cap.


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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.
    

7Back to top Go down   Opening a petrol tank cap  Empty Re: Opening a petrol tank cap on Sun Sep 06, 2020 2:29 am

Gaz

Gaz
Life time member
Life time member
I guess that distance covered has some relevance to the amount of operations of the fuel cap lock. My K1100 and I had travelled 180,000km (a bit over 110,000 miles) together when I sold it and I had not had any problems with the fuel cap, which I am sure is the same cap as the K100 & K75 except for the very early ones which I believe had a push button.

I did however have the cap apart to fit a new gasket set in it somewhere on the high side of 100,000km. This exercise of course included thoroughly cleaning and lubing the mechanism.

It is likely that here in Australia we don't have the same amount of inclement weather that northern hemisphere members may experience and I am lucky that my bikes are always garaged when not out on the road. We are more often concerned with dust getting into every nook and cranny than corrosion causing issues.

The hole drilled for emergency unlocking is a great safeguard but if you're not inclined to go that way why not pull it apart for a service every few years. Here in Oz we can buy the overhaul kits here .

Cheers


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Gaz
1990 K75 6427509; 1987 R80G/S PD 6292136; 2010 G650GS ZW13381; 95 K1100LT 0232224
    

8Back to top Go down   Opening a petrol tank cap  Empty Re: Opening a petrol tank cap on Sun Sep 06, 2020 11:56 am

DeanG

DeanG
active member
active member
Thanks! I note that upon fill up the oder of gas can be pretty intense. This may be how I can deal with it. It also looks like something that I can do myself!

    

9Back to top Go down   Opening a petrol tank cap  Empty Re: Opening a petrol tank cap on Sun Sep 06, 2020 3:00 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I'm doing this every two years on my bikes.  Caps work fine.

https://www.youtube.com/watch?v=Mwpt9IumBCc

I'd like to find a spring that isn't quite as strong as the one from the factory.  I don't think it needs to push that hard on the latch.


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Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

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