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Old 11-09-2013, 05:09 AM   #1
dready bear OP
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what WP white power forks have i just bought?

Right, I have just bought a pair of white power forks to fit to my F650GS Dakar.
They are off a 2005 Ccm 644 DS.

But what model are they??? as i need to order new springs, yokes ect

I'm sure they are 48mm but bar that I have searched and searched but cant find anything :( i thought they were going to be WP 4357 or WP 4860, but i cant see them number anywhere :(

The top cap numbers on each are
42.02
0502W713

the lower numbers are different,
no disk side
01 (in a sun thing)
2886
disk side
02 (in a sun thing)
2885

on the inside of the fork guards it has KTM stamped inn


all this means nothing to me so can anyone help?
Will

dready bear screwed with this post 11-09-2013 at 06:23 AM
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Old 11-09-2013, 05:55 AM   #2
davesupreme
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look on the fork bottoms.... there should be a number stamped, like '14.18.X7.27'.... i can look it up in the factory manual if it's off an RFS bike....

my bad.... i just saw the bottom number.... my KTM manual has 05.18.W7.12, so it's kinda close...

i would like to know what all the numbers mean, i'm sure it has something to do w/valving.... the numbers do mean something, in true 'teutonic' fashion....

anybody know how to decipher them?....

davesupreme screwed with this post 11-09-2013 at 06:00 AM
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Old 11-09-2013, 08:49 AM   #3
gunnerbuck
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Those forks look to be 4860s from the 2002-2005 era, to confirm you can put a caliper on the tubes {48mm} and look for the 3rd slider bushing when you have them apart.. The springs are switchable between all 48mm WPs but spring length may need to be compensated... I have run 950 springs in my 4860- 640A forks and used 20 mm spacers to make up for spring length differences.. If longer springs are used cutting them shorter increases the spring rate...
By the looks of it your forks are set up for 20 mm axles which is not a big deal as with a set of 03 ktm 640 spacers {part# 58409012000} you can run the current ktm 26mm axle front wheels...

gunnerbuck screwed with this post 11-09-2013 at 09:35 AM
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Old 11-09-2013, 09:31 AM   #4
dready bear OP
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Quote:
Originally Posted by gunnerbuck View Post
Those forks look to be 4860s from the 2002-2005 era, to confirm you can put a caliper on the tubes {48mm} and look for the 3rd slider bushing when you have them apart.. The springs are switchable between all 48mm WPs but spring length may need to be compensated... I have run 950 springs in my 4860- 640A forks and used 20 mm spacers to make up for spring length differences.. If longer springs are used cutting them shorter increases the spring rate...
By the looks of it your forks are set up for 20 mm axles which is not a big deal as with a set of 03 ktm 640 spacers {part# 58409012000} you can run the current 26mm front wheels...
Yep there 4357 forks, with 20mm through axel. Cheers for the help
I take it all 4357 yokes fit or dies it matter what manufactur and cc the yokes are off?

dready bear screwed with this post 11-09-2013 at 10:28 AM
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Old 11-09-2013, 09:56 AM   #5
gunnerbuck
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Quote:
Originally Posted by dready bear View Post
Yep there 4860 forks, with 20mm through axel. Cheers for the help
I take it all 4860 yokes fit or dies it matter what manufactur and cc the yokes are off?
What bike do you plan to use the forks on?
The triple clamps will need to be made for WP forks...Between KTM models the clamps have different offsets which will mean better turning {single track} or better high speed stability {desert racing}, some models have an adjustable offset... I believe even between the 640 Adventure {48mm} and 640 Enduro {43mm} clamps there is a different offset with the 640a being set for more high speed stability over the 640E ...

As far as outer tube size the top clamp fork diameter is the same for both 43mm and 48 mm WP forks but the lower clamp tube diameter only fits clamps designed for 48mm forks...

Depending on application you can shorten the travel a bit by installing a spacer between the rebound spring or use a longer spring...
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Old 11-09-2013, 10:09 AM   #6
davesupreme
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i don't think you wanna run those forks w/a 43mm offset triple... you'd have no trail, and it'll kill ya'....... the big KTM's w/the long offset triples have a totally different fork bottom, more like a street bike, i don't know all the numbers, but....... you gotta know what 'trail' is/does before you do this....
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Old 11-10-2013, 02:27 AM   #7
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All the KTM triples you will find for the 43mm forks will be either 18 or 20mm offset, so that's not really a concern.
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Old 03-02-2015, 02:10 PM   #8
ChrisUK
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Hi guys.
Found this thread via a Google search. I've recently had new (to me) forks fitted onto my BMW XChalllenge. I'm trying to workout what fork seals fit the forks, so that when I need to, have spares. The bike is being shipped to South America from the UK.

The forks are 48mm White Power usd.

Fork tube are gold and 48mm. Sliders are black (09. 01 1423v738 stamped into the top of each).

So, does anyone how what fork seals I should buy?

Many thanks.
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