BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   Fork diameter Empty Fork diameter on Sat Oct 05, 2019 9:09 am

K100uk

K100uk
active member
active member
Just wondering if someone could help me find a new set of fork pre adjusters and what the actual internal thread diameter is? Having trouble locating a nice set....
Does anyone have some links handy? 1984 k100 standard
Many thanks

    

2Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 10:14 am

Snod Blatter

Snod Blatter
Life time member
Life time member
Do you mean preload adjusters to go in the top of the stanchion? Because if so I've got some bad news for you, there isn't any thread - the tops are held in place by a really stupid circular clip thing instead.


__________________________________________________
1989 K100RS SE ABS 8v  VIN: 0149214
Others: 1.5 x Honda CBX250RS-E, '94 CB250, '95 TRX850, '16 Z250SL
http://justbikethings.blogspot.co.uk/
    

3Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 10:56 am

K100uk

K100uk
active member
active member
Thanks for that,bit of bumber but glad I asked.i assume bmw still stock this part? is it likely to try and take my eye out or stuburn to remove?

    

4Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 11:34 am

Laitch

Laitch
Life time member
Life time member
@K100uk wrote:i assume bmw still stock this part? is it likely to try and take my eye out or stuburn to remove?
If you have one and the filler screw in the center of it isn't permanently seized, then you shouldn't need to buy a new one. Replacing the circlip that holds it down might be a good move.

It takes leverage to remove it. The cap assembly must be pushed down far enough and held while the clip in the groove above it is removed using a screwdriver or pick. The cap is unlikely to be launched to the ceiling but if it's being pushed down by hand with a socket on an extension and things go sideways, parts or tools can jump at you. Some convenient leverage is all that's needed but brute force will do it, too, especially if you're blessed with a third hand. It's a wise precaution to wear safety glasses anytime around parts under pressure, and keep your mouth closed. Laughing

Here's a photo demonstrating the effective use of a gear puller for the task.

Fork diameter Fork_c10


__________________________________________________
1995 K75 73,000 miles
Fork diameter Usa-lo10
    

5Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 12:33 pm

Snod Blatter

Snod Blatter
Life time member
Life time member
I found it only somewhat difficult by using a hex bit in the bolt and a screwdriver to lever it down, using the top yoke:
Fork diameter CVwhVHB
Quite what BMW had against the usual threaded setup I can't imagine. Too easy perhaps?


__________________________________________________
1989 K100RS SE ABS 8v  VIN: 0149214
Others: 1.5 x Honda CBX250RS-E, '94 CB250, '95 TRX850, '16 Z250SL
http://justbikethings.blogspot.co.uk/
    

6Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 12:52 pm

K100uk

K100uk
active member
active member
Thanks for the great info and pics very helpful, my bike looks like it might have a slightly different setup, maybe it was changed by previous owner I'm not sure.
Fork diameter Img_2010

    

7Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 1:00 pm

Laitch

Laitch
Life time member
Life time member
@K100uk wrote:Thanks for the great info and pics very helpful, my bike looks like it might have a slightly different setup, . . .
Only slightly. You'll still be using leverage to remove the snap ring. There's no escape. Smile


__________________________________________________
1995 K75 73,000 miles
Fork diameter Usa-lo10
    

8Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 1:05 pm

K100uk

K100uk
active member
active member
Ok thanks alot think I will have a look at a parts diagram just to understand the assembly better Smile

    

9Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 3:46 pm

Laitch

Laitch
Life time member
Life time member
@K100uk wrote:Ok thanks alot think I will have a look at a parts diagram just to understand the assembly better Smile
There are three types of fork assemblies used on the classic 2V Bricks. Although the plug with the hex bolt in its center (called the spring retainer in BMW parts fiches) might differ in appearance slightly from model to model, all of them are held in place by spring pressure pushing them against a snap ring that is installed into a groove along the inside perimeter of the fork tube. Fork assemblies have sometimes been swapped among models so do your best to identify what you have by comparing parts to fiche diagrams.

In the meantime, look at this extract from an instruction manual found in the Tech Section of this site.


__________________________________________________
1995 K75 73,000 miles
Fork diameter Usa-lo10
    

10Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 4:32 pm

volador

volador
Silver member
Silver member
@Laitch wrote:There are three types of fork assemblies used on the classic 2V Bricks...

Showa or Fichtel or Sachs


__________________________________________________
1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

11Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 5:20 pm

Laitch

Laitch
Life time member
Life time member
@volador wrote:
@Laitch wrote:There are three types of fork assemblies used on the classic 2V Bricks...
Showa or Fichtel or Sachs
Showa, Brembo, Fichtel&Sachs.
Fork diameter Screen85


__________________________________________________
1995 K75 73,000 miles
Fork diameter Usa-lo10
    

12Back to top Go down   Fork diameter Empty Re: Fork diameter on Sun Oct 06, 2019 5:44 pm

Laitch

Laitch
Life time member
Life time member
@volador wrote:Showa or Fichtel or Sachs
Your webinar ticket has been given to a recent immigrant moto mechanic from Honduras who indicated mashed peas sounded good to her. The squid ink has been sold off to recoup costs. Your refund will be in gift cards to be sent to you by one of five Seattle area motorcycle dealerships as soon as they reopen.


__________________________________________________
1995 K75 73,000 miles
Fork diameter Usa-lo10
    

13Back to top Go down   Fork diameter Empty Re: Fork diameter on Mon Oct 14, 2019 5:24 pm

jbt

jbt
Silver member
Silver member
@Laitch wrote:

Showa, Brembo, Fichtel&Sachs.
Fork diameter Screen85
There's a slight difference in the early K100 forks.
The top of the slider, where sits the gasket ring,  is wider before 09/1985 than after.
One should not notice but...it makes impossible to mount Tarozzi or Telefix fork braces on it. Yet they mention K100 from 83 on the box , they only fit post-09/85 models.
Don't ask how I know that...

    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum