BMW K bikes (Bricks)

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1Back to top Go down    Fork upgrade on Wed Sep 19, 2018 5:07 am

Blackthumb

Blackthumb
active member
active member
Interested in upgrading the forks on my 1986 k100rt to a chunkyer more sub substantial looking setup (this is for aesthetics only, I do not wish to change the geometry of the bike). Does anyone have any experience with this type of mod?

    

2Back to top Go down    Re: Fork upgrade on Wed Sep 19, 2018 8:15 am

RicK G

RicK G
VIP
VIP
Quite a few have used the Suzuki Hyabusa front end you get a great brake upgrade as well.


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"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats." from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

3Back to top Go down    Re: Fork upgrade on Wed Sep 19, 2018 8:25 am

Blackthumb

Blackthumb
active member
active member
Interesting, thanks Rick G do you know what mods are required to alow fitment?

    

4Back to top Go down    Re: Fork upgrade on Wed Sep 19, 2018 9:03 am

RicK G

RicK G
VIP
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From what I hear it is one of the easier but it will limit the steering angle/lock


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats." from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

5Back to top Go down    Re: Fork upgrade on Mon Nov 12, 2018 5:10 pm

lagios

lagios
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In my notes to research is the upgrade to the S1000RR forks.

    

6Back to top Go down    Re: Fork upgrade on Mon Nov 12, 2018 5:35 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
S1000R, RR & R9T (inverted fork models) share the same steering stem and set of bearings but those bearings differ from every other forked BMW model. Some creativity/science will apply.


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1987 K100RS, '89 K100 w/K1100RS engine, '93 Framed K11/K12 engine 'Big Block', '09 K1300GT, '07 K1200R, '95 R100 Mystic & '77 R75/7.

    

7Back to top Go down    Re: Fork upgrade on Mon Nov 12, 2018 6:55 pm

DBRMN

DBRMN
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I wanted to upgrade to Suzuki GSXR 1000 forks, if you look up a block called Mike Flores, he did it and I think its the perfect fork size for a K100. You can get a plug and play triple tree from Cognito Moto

http://dbrmn.kforum-tech.com
    

8Back to top Go down    Re: Fork upgrade on Wed Nov 14, 2018 1:17 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
@Blackthumb wrote:Interested in upgrading the forks on my 1986 k100rt to a chunkyer more sub substantial looking setup (this is for aesthetics only, I do not wish to change the geometry of the bike). Does anyone have any experience with this type of mod?
Another way to go about this is to locate a set of BMW Marzocchi forks, 17" 3 spoke wheel & requisite axle, two-piece mudguard, four pot Brembo callipers and floating 305mm discs from a K1100RS or 16V K100RS (this swap requires a 20mm K11RS master cylinder). While not inverted like modern motos they are more substantial than the F&S, Showa or other stock forks, will slide right in using the same bearing size, lockdown nuts and steering stem diametre, and you will not have changed the rake/trail or wheelbase much (there IS a slight diff) - using anything from Yammie, Kwacka, Suzi & the lot you will not know what you are getting. It could end up handling (more) like a truck or be so steep as to chuck you on yer earhole at the first roundabout. I note that in most articles about 'custom builds' of K bikes, the handling of the bike, while possibly a nice looking profile in glossy magazine or online piccies as compared to stock, is rarely if ever mentioned.


__________________________________________________

1987 K100RS, '89 K100 w/K1100RS engine, '93 Framed K11/K12 engine 'Big Block', '09 K1300GT, '07 K1200R, '95 R100 Mystic & '77 R75/7.

    

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