BMW K bikes (Bricks)

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1Back to top Go down   interesting fork modification Empty interesting fork modification Fri May 17, 2013 4:07 am

Crazy Frog

Crazy Frog
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If you cannot afford a leading link fork, here is a simple cheap modification. Very Happy

This is an original modification made by AJF Axion.

interesting fork modification Deport10

interesting fork modification Dsc00310


__________________________________________________
interesting fork modification Frog15interesting fork modification Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

2Back to top Go down   interesting fork modification Empty Re: interesting fork modification Fri May 17, 2013 7:42 am

K75cster

K75cster
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Struth that showed up the difference didnt it, hope it handled well enough to warrent the work


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Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

3Back to top Go down   interesting fork modification Empty Re: interesting fork modification Fri May 17, 2013 7:06 pm

sidecar paul

sidecar paul
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Yes, very interesting, CF.
On a K the front wheel spindle needs to move forward between 50 and 70mm and I've been doing some sketches of a similar arrangement for a K but, as yet, I haven't come up with a good (simple?) design. Swapping the fork legs over is the first step......to put the caliper mounts at the front. Then it should be easy enough to make some caliper mounting plates. Sorting the wheel axle mounts is rather more tricky though.
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!
    

4Back to top Go down   interesting fork modification Empty Re: interesting fork modification Fri May 17, 2013 7:45 pm

charlie99

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it would be interesting to see the additional wear to the forks with that amount of offset forward .

just a thought


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Ointeresting fork modification 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 ..
    

5Back to top Go down   interesting fork modification Empty Re: interesting fork modification Fri May 17, 2013 8:55 pm

Crazy Frog

Crazy Frog
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sidecar paul wrote:Then it should be easy enough to make some caliper mounting plates. Sorting the wheel axle mounts is rather more tricky though.
Paul.
The calipers can be mounted the same way as it is on the EML.
The mounting plates have a bearing and are rotating on the wheel shaft.
If the weather cooperates, I will try to take pictures tomorrow.
I believe that you can do the whole assembly without turning the forks. The original caliper mounting hole would only be used to attach the extension.
The only major modification would be a longer wheel axle.
Let me find some free time and I will try to sketch something for you. (I have some ideas)
Many heads working on the same project can lead to an easy solution. Very Happy
I already have a leading fork, but designing something to modify the original fork interest me.

CF


__________________________________________________
interesting fork modification Frog15interesting fork modification Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

6Back to top Go down   interesting fork modification Empty Re: interesting fork modification Sat May 18, 2013 5:32 pm

sidecar paul

sidecar paul
Life time member
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Crazy Frog wrote:
I already have a leading fork, but designing something to modify the original fork interest me.

CF
Exactly my feelings,
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!
    

7Back to top Go down   interesting fork modification Empty Re: interesting fork modification Sun May 19, 2013 6:15 am

K75cster

K75cster
Life time member
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Just so I get this right, you are talking of using the left leg in the right and right in the left that is pull em both out and turn em over and put em in then fabricate the fork extension. if that is right and you add the callipar mounts to the fork extension then all that is needed is for longer brake tubes fron the flexible hose to the new calipar location, am I on the same page as you blokes yet????


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

8Back to top Go down   interesting fork modification Empty Re: interesting fork modification Sun May 19, 2013 6:47 pm

sidecar paul

sidecar paul
Life time member
Life time member
K75cster wrote:Just so I get this right, you are talking of using the left leg in the right and right in the left that is pull em both out and turn em over and put em in then fabricate the fork extension. if that is right and you add the callipar mounts to the fork extension then all that is needed is for longer brake tubes fron the flexible hose to the new calipar location, am I on the same page as you blokes yet????
More or less, but sidecar blokes do go to some weird pages. scratch
Swapping the legs over just provides some mounting points at the front as can be seen on CF's initial pics.

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   interesting fork modification Empty Re: interesting fork modification Sun May 19, 2013 6:53 pm

Crazy Frog

Crazy Frog
admin
admin
Here is a pic of the EML brake calipers. This could give you some ideas.

The support is mounted on the wheel shaft.
To modify an original fork:
If the piece to bring forward the wheel axle was a U shape type, the problem would be solved.
The way that I see the piece to bring the wheel forward: It should be attached to the original holes holding the caliper and a 'stub' the size of the wheel shaft should be welded on the bracket and inserted in the bottom of the fork . This way you have a 3 fix points of contact for the extension.
I will sketch that later.
interesting fork modification Dsc_2419


__________________________________________________
interesting fork modification Frog15interesting fork modification Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

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