BMW K bikes (Bricks)

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1Back to top Go down   K100RS Fork changes?? Empty K100RS Fork changes?? Tue Mar 30, 2010 7:32 pm

Bonzo

Bonzo
Life time member
Life time member
Howdy folks,

Im wondering if anyone knows what changes there were to the K100 forks through the model run.

The reason Im asking, is because I recently ordered a new Wilbers rear shock, and while I was in the spending mood I thought Id better replace the fork springs too. However, my stanchions are a little pitted which is making the seals weep a little, so Iwent along and oredered a set of Wilbers stanchions too. Hey, its only money K100RS Fork changes?? Icon_clown

Anyway, shock & forks springs arrived fine, but Im unsure if they sent me the right stanchions. My bike is a 1990 K100RS 16v. The stanchions turned up marked for a K100RS 83-89. Now you & I know thats the 8v model, but the supplier reckons its right.

If you look at this pdf file, the ones they sent me were 590-165-06, whereas I think it should be 590-643-01 but the dates for this is 91-93.

Could it be that the forks on my '90 16v are the same as the early 83 on forks, and BMW only changed the forks in '91??

I know I could borrow a vernier guage at the weekend and check the sizes 41.3mm (early) 41.65 (later), but maybe someone on this forum might have some data or a spec sheet?

Regards

Bonz

    

2Back to top Go down   K100RS Fork changes?? Empty Re: K100RS Fork changes?? Wed Mar 31, 2010 3:44 am

green cat

green cat
Silver member
Silver member
No they are different; You have Two kinds of forks for K fron 83 to 89, first Brembo then Showa; after that you have two different kinds of forks: K1, K100RS 16V from 89 to August 91, and then another type which fits on K 1100 LT and RS, plus K1. The brembo, the showa and the other two types of forks have different diameters, and the suspension system is different, springs are not the same. I have a K1 fork on the K1100, it's stronger...


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[img]K100RS Fork changes?? 3cc2228804714fdc8e93fe1f84a93706 [/img][img]K100RS Fork changes?? K1100l10
    

3Back to top Go down   K100RS Fork changes?? Empty Re: K100RS Fork changes?? Wed Mar 31, 2010 5:33 am

Bonzo

Bonzo
Life time member
Life time member
Thanks for your reply green cat,

I didnt realise there were that many changes.

So my 1990 16v has Showa forks as original fitment?

Didnt they also us Marzochi on some models?

    

4Back to top Go down   K100RS Fork changes?? Empty Re: K100RS Fork changes?? Wed Mar 31, 2010 6:14 am

green cat

green cat
Silver member
Silver member
I'm not sure, i had marzochi seals in the fork, it is perhaps a marzochi indeed. i 'm sure for the showa forks til 89, and i have not the bike with me to check...


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[img]K100RS Fork changes?? 3cc2228804714fdc8e93fe1f84a93706 [/img][img]K100RS Fork changes?? K1100l10
    

5Back to top Go down   K100RS Fork changes?? Empty Re: K100RS Fork changes?? Wed Mar 31, 2010 6:32 am

Bonzo

Bonzo
Life time member
Life time member
Thanks again green cat.

I cant make out any visible signs on the fork anywhere to indicate which manufacturer it came from, so Ill have to try and get hold of a vernier.

Cheers for your help

    

6Back to top Go down   K100RS Fork changes?? Empty Re: K100RS Fork changes?? Wed Mar 31, 2010 6:48 am

green cat

green cat
Silver member
Silver member
You're welcome!!!

what's the weather like on your isle? It a place i've never been to but i'll try to go there sometime... in fact the pictures i 've seen make me realy interrested in visiting that what seem to be a kind of paradise


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[img]K100RS Fork changes?? 3cc2228804714fdc8e93fe1f84a93706 [/img][img]K100RS Fork changes?? K1100l10
    

7Back to top Go down   K100RS Fork changes?? Empty Re: K100RS Fork changes?? Wed Mar 31, 2010 6:58 am

Bonzo

Bonzo
Life time member
Life time member
Ah! Today is not a good day.

Its snowing with blizzard like winds. Not a biking day.

    

8Back to top Go down   K100RS Fork changes?? Empty Re: K100RS Fork changes?? Wed Mar 31, 2010 7:00 am

green cat

green cat
Silver member
Silver member
Here it's the same, windy and rainy.... yesterday was better, i took the "panzer" for a ride in the afternoon, great!!!

i'm longing for spring to come.....


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[img]K100RS Fork changes?? 3cc2228804714fdc8e93fe1f84a93706 [/img][img]K100RS Fork changes?? K1100l10
    

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