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    Has anyone tried ikon fork springs on Sat Sep 22, 2018 10:33 pm

MarcS

avatar
Silver member
Silver member
I have heard lots of bad things about the rear shocks, but has anyone had experience with the progressive fork springs? I am getting a minor front end wobble and my spring sag is now about 55mm. These ones are $143 which seems quite reasonable

https://www.ikonsuspension.com.au/shop/500-003/


__________________________________________________
K100rt ex plod bike 5/1990.



I have no problem with authority. Just some of the morons that are paid to enforce it.
    

2Back to top Go down    Re: Has anyone tried ikon fork springs on Sat Sep 22, 2018 11:52 pm

charlie99

avatar
VIP
VIP
might be better money spent sorting out the damping marc ...no spring will fix that
but sag can be preloaded a bit ….most of the after market spring sets come with precut tubes of plastic for preload
including some progresives I got a few years back , locally , brand new for 99  ...not fitted yet , but going into the old k100 forks soon enough

as soon as I can do an order to the bins for those piston sleaves ,,,and  a few other bits , timing chain etc

time to time I get enough to continue , but sporadic all the same


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

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

3Back to top Go down    Re: Has anyone tried ikon fork springs on Sun Sep 23, 2018 2:37 am

nobbylon

avatar
Silver member
Silver member
I have the springs in my R75/6 and rears on both it and the R90s. No complaints at all.


__________________________________________________
R1100GS Feb 1995
K100RS July 1989
K100 Dec 1983 
R90s June 1975
R75/6 Feb 1976
F650GD May 2001
    

4Back to top Go down    Re: Has anyone tried ikon fork springs on Sun Sep 23, 2018 2:44 am

nino


Life time member
Life time member
German Wirth progressive from Ebay tranformed my bike totally. After few years on Wirth full reccomendations.
You dont need spacers with its long enough. Price was cca 100 Euro

    

5Back to top Go down    Re: Has anyone tried ikon fork springs on Sun Sep 23, 2018 7:24 am

Dai

avatar
Life time member
Life time member
Ditto for fitting Hyperpro progressives into LFB. I also fitted at set of Motorworks' own progressives to Brick 2 at less than half the price of the Hyperpros and couldn't tell the difference between the two. Add a RamShock to the rear and I thought someone had given me a new bike with all the old scratches carefully carved into it.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

6Back to top Go down    Re: Has anyone tried ikon fork springs on Fri Oct 05, 2018 9:38 pm

MarcS

avatar
Silver member
Silver member
My progressive springs arrived from Motobins yesterday. They are 530mm long which seems awfully short to me (free length). I guess there will be a fair length of spacer in the forks with the original springs. How much static sag do you guys recommend for my K100. I have read a few articles and they are all very generalized, covering many bikes. I changed the fork oil a few weeks ago and got a huge improvement but I am still using most of my travel under hard braking and have about 50mm of sag with the old springs.


__________________________________________________
K100rt ex plod bike 5/1990.



I have no problem with authority. Just some of the morons that are paid to enforce it.
    

7Back to top Go down    Re: Has anyone tried ikon fork springs on Fri Oct 05, 2018 10:31 pm

Two Wheels Better

avatar
Moderator
Moderator
The Progressive front springs I've used in the past for Airheads and early Ks were meant to use a 75mm/3" PVC pipe you cut to your preload requirements. 10 years or more back it was supplied with them. No more?


__________________________________________________

1987 K100RS, '93 Framed K11/K12 engine 'Big Block', '09 K1300GT, '07 K1200R, '04 R1150RT, '95 R100 Mystic, '77 R75/7.
Sniff...can you smell that? I think it might be bullsh*t.

    

8Back to top Go down    Re: Has anyone tried ikon fork springs on Sat Oct 06, 2018 2:56 am

MarcS

avatar
Silver member
Silver member
Nope, just plastic wrapping and a key ring in the package.


__________________________________________________
K100rt ex plod bike 5/1990.



I have no problem with authority. Just some of the morons that are paid to enforce it.
    

9Back to top Go down    Re: Has anyone tried ikon fork springs on Sat Oct 06, 2018 6:26 am

Two Wheels Better

avatar
Moderator
Moderator
@MarcS wrote:Nope, just plastic wrapping and a key ring in the package.
On Airheads, at least, the 75mm length always felt too harsh, so I cut them down to 50mm or so, using Airhead wheel shim spacers to fine tune. It bothered me that they supplied them so short for the application. I didn't stick with them in other models in the future, tho' they did the job as intended.


__________________________________________________

1987 K100RS, '93 Framed K11/K12 engine 'Big Block', '09 K1300GT, '07 K1200R, '04 R1150RT, '95 R100 Mystic, '77 R75/7.
Sniff...can you smell that? I think it might be bullsh*t.

    

10Back to top Go down    Re: Has anyone tried ikon fork springs on Sat Oct 06, 2018 7:18 am

Dai

avatar
Life time member
Life time member
@MarcS wrote:Nope, just plastic wrapping and a key ring in the package.
There's a spacer in with the original springs. Use that. Oddly enough, I just fitted a pair of Wirth progressives to my Bandit and those did away with the OEM spacer.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

11Back to top Go down    Re: Has anyone tried ikon fork springs on Sat Oct 06, 2018 4:10 pm

Laitch

avatar
Life time member
Life time member
@MarcS wrote:Nope, just plastic wrapping and a key ring in the package.
If you had purchased Progressive progressive springs directly from Progressive Suspension, two spacers and washers would have accompanied the springs. As it is, you seemed to have purchased progressive springs not made by Progressive, or maybe somebody at Motobins has a compulsion to horde pvc pipe whenever encountered.

Finding pipe for substitution shouldn't be a problem and the pipe should help take up slack. Here is an image of what is in a Progressive progressive box, model 11-1126 for your 1990 K100RT.



Last edited by Laitch on Sat Oct 06, 2018 8:55 pm; edited 1 time in total


__________________________________________________
1995 K75T 68,000 miles
    

12Back to top Go down    Re: Has anyone tried ikon fork springs on Sat Oct 06, 2018 8:01 pm

Dai

avatar
Life time member
Life time member
@Laitch wrote:maybe somebody at Motobins has a compulsion to horde pvc pipe whenever encountered.
Ha! That's a good one! Although seriously, both the Hyperpro and the Motorworks-own that I bought required the re-use of the OEM spacer.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

13Back to top Go down    Re: Has anyone tried ikon fork springs on Sat Oct 06, 2018 8:57 pm

MarcS

avatar
Silver member
Silver member


The ones on the right



Last edited by MarcS on Sat Oct 06, 2018 9:05 pm; edited 1 time in total


__________________________________________________
K100rt ex plod bike 5/1990.



I have no problem with authority. Just some of the morons that are paid to enforce it.
    

14Back to top Go down    Re: Has anyone tried ikon fork springs on Sat Oct 06, 2018 9:04 pm

Two Wheels Better

avatar
Moderator
Moderator
A private brand of fork spring, not the actual brand Progressive, even though it's noted as 'Progressive' on their website. That 'splains a bit. I'd try 'em. I've bought Motoworks & Motobins for yonks and trust their overall quality of product.


__________________________________________________

1987 K100RS, '93 Framed K11/K12 engine 'Big Block', '09 K1300GT, '07 K1200R, '04 R1150RT, '95 R100 Mystic, '77 R75/7.
Sniff...can you smell that? I think it might be bullsh*t.

    

15Back to top Go down    Re: Has anyone tried ikon fork springs on Sun Oct 07, 2018 12:53 am

MarcS

avatar
Silver member
Silver member
Fitted the new springs this arvo and the first impression is a vast improvement. I am still not sure what the static sag should be (any ideas guys?) but I ended up using a 25mm spacer on each spring.



These are the old and new springs. The old short ones came with an inch of washers packed in with the original spacer


__________________________________________________
K100rt ex plod bike 5/1990.



I have no problem with authority. Just some of the morons that are paid to enforce it.
    

16Back to top Go down    Re: Has anyone tried ikon fork springs on Sun Oct 07, 2018 9:51 am

Laitch

avatar
Life time member
Life time member
@MarcS wrote:Fitted the new springs this arvo and the first impression is a vast improvement. I am still not sure what the static sag should be (any ideas guys?) but I ended up using a 25mm spacer on each spring.
Sag adjustment is rider-and-load weight dependent, and apparently a social event. My Progressive rear shock came with an enclosure that recommended the method of adjustment explained in this article. I followed it then tweaked it slightly after a year. I don't really bull-and-jam my moto over the road and through the corners living on a thread of traction. My body has developed indifference to discomfort. Maybe that's just increasing elderly numbness. All I want is control over the rough stuff when solo or two-up and I've got that with how I've adjusted things.


__________________________________________________
1995 K75T 68,000 miles
    

17Back to top Go down    Re: Has anyone tried ikon fork springs on Mon Oct 08, 2018 1:32 am

MarcS

avatar
Silver member
Silver member
Thanks for that Laitch. I have found a few generic descriptions on sag but I am looking for a more k100 specific article. I currently have about 25mm of front sag , that seems well in the ball park. I was looking for some of the experiences of the more adventurous K100 suspension tuners.


__________________________________________________
K100rt ex plod bike 5/1990.



I have no problem with authority. Just some of the morons that are paid to enforce it.
    

18Back to top Go down    Re: Has anyone tried ikon fork springs on Mon Oct 08, 2018 3:29 am

charlie99

avatar
VIP
VIP
25- 35 mm sounds about right mate

although my k75 forks drop a good 35-45 ..


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

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

19Back to top Go down    Re: Has anyone tried ikon fork springs on Mon Oct 08, 2018 4:58 am

TheGreatMorten

avatar
active member
active member
Im being told that you need some special tools when changing your forksprings on my k100.. mine is a bit soft, and im thinking about getting the ones from bsk

http://www.bskspeedworks.co.uk/ram-progressive-fork-springs.html

Can you Guys tell me if its true, and if so, where i can buy it?

    

20Back to top Go down    Re: Has anyone tried ikon fork springs on Mon Oct 08, 2018 5:23 am

Laitch

avatar
Life time member
Life time member
@TheGreatMorten wrote:Im being told that you need some special tools when changing your forksprings on my k100
Can you Guys tell me if its true, and if so, where i can buy it?
How is special defined? Tools given as gifts by lovers? Tools purloined from disrespectful supervisors? Gold-plated tools?

A vice with soft jaws can be helpful; a gear puller of the right dimension might help, too but patience, determination, and mechanical aptitude will get the job done without those items. You might want to use eye protection sometimes but it doesn't need to be from Ralph Lauren. Who is telling you these things? Are cautionary audio transmissions coming through your dentalwork? It would be helpful for you to put your bike's model and year in the box labeled bike* in your profile so it will show up in every post and we'll know what you've got. You probably should start your own thread about this rumor, too, rather than interfere in Marc's ongoing research into the black art of K100 fork tuning. Smile


__________________________________________________
1995 K75T 68,000 miles
    

21Back to top Go down    Re: Has anyone tried ikon fork springs on Mon Oct 08, 2018 5:29 am

TheGreatMorten

avatar
active member
active member
@Laitch wrote:
@TheGreatMorten wrote:Im being told that you need some special tools when changing your forksprings on my k100
Can you Guys tell me if its true, and if so, where i can buy it?
How is special defined? Tools given as gifts by lovers? Tools purloined from disrespectful supervisors? Gold-plated tools?

A vice with soft jaws can be helpful; a gear puller of the right dimension might help, too but patience, determination, and mechanical aptitude will get the job done without those items. You might want to use eye protection sometimes but it doesn't need to be from Ralph Lauren. Who is telling you these things? Are cautionary audio transmissions coming through your dentalwork? It would be helpful for you to put your bike's model and year in the box labeled bike* in your profile so it will show up in every post and we'll know what you've got. You probably should start your own thread about this rumor, too, rather than interfere in Marc's ongoing research into the black art of K100 fork tuning. Smile


Well im interested in his choice of springs aswell Very Happy
Im running a k100 RS16v from 1991.

I got a friend who told me to get the tools, since he could not change his own forksprings

    

22Back to top Go down    Re: Has anyone tried ikon fork springs on Tue Oct 09, 2018 7:02 pm

MarcS

avatar
Silver member
Silver member
I changed the springs with the forks on the bike. The only "special tools" I used was a pulley remover to press the spring down so that I could remove the snap ring inside the fork tube and one wife ( I only have the one, can you imagine the stress and noise with more than that?) to poke the snap ring back in when I had the new springs in place. The bolts in the caps don't actually hold anything and don't need to be undone.


__________________________________________________
K100rt ex plod bike 5/1990.



I have no problem with authority. Just some of the morons that are paid to enforce it.
    

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