K100RS rear shock - K-Bikes.com - Excellence in Motion
 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old Oct 18th, 2010, 2:02 pm Thread Starter
Rookie
 
krrs's Avatar
 
Join Date: Apr 2010
Location: winnipeg, mb, canada
Posts: 40
K100RS rear shock

Hi guys. Want a lowering shock for my 1989 K100RS. Anyone ever heard of/any experience with IKON shock. Anyother words of wisdom for lowering this type of K bike. I have a Seargent seat. About the same height as the stock seat, but lower than any Corbin I have tried.
krrs is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old Oct 19th, 2010, 5:25 am
Member
 
beachcomber's Avatar
 
Join Date: Jun 2010
Location: Redditch / Reichenau, , UK and Germany
Posts: 65
The Ikon shock is a good piece - derived from the Koni stock line [ Ikon - Koni get it?]

However, check out threads here and elsewhere about the new [ to motorcycles ] RAM shocker - specially developed for Kays, and a 25mm shorter version developed especially as I am a bit short in the leg department! You've also got YSS, Progressive etc. available.

There is a group buy planned for this site in order to bring the carriage costs down - not sure how the dollar / sterling conversion is working for you - but the RAM shocker is good value for money in the USA and here in the UK.

If you are lowering the bike via shorter shocker - don't forget to raise the fork legs to compensate [ around 3/16" ] and reinstate the OEM geometery - if that's what you want of course !

Beachcomber
"if at first you don't succeed, you've already been a failure once"
beachcomber is offline  
post #3 of 10 (permalink) Old Oct 20th, 2010, 1:38 pm
Rookie
 
Join Date: Nov 2008
Location: Washington, PA, USA
Posts: 33
I first shortened my K100LT with progressive and after 8 months went with the RAM group buy, Couldn't be happier with the RAM. The price is very fair also.
Beachcomber: I'm curious how you arrive at 3/16" in front when lowering 25mm in back. Not doubting you, just curious.

87 K100LT
97 R850R
00 KLR650
03 KDX220
bpbiker is offline  
Sponsored Links
Advertisement
 
post #4 of 10 (permalink) Old Oct 20th, 2010, 4:07 pm
Member
 
beachcomber's Avatar
 
Join Date: Jun 2010
Location: Redditch / Reichenau, , UK and Germany
Posts: 65
BP,

thanx for the kind words - glad you're enjoying the experience.

OK the 3/16" .................

To begin, due to the angle of the installation a 25mm shorter shocker does NOT lower the seat height by 25mm [ Pythagoras and all that jazz ].

We arrived at the 3/16" after a full morning testing on a closed race track - with a qualified Club Racer aboard.

First we took measurements from 10 misc. Kays - 100's and 1100's. No two within the same group had the same base datum ! Sooooo - we took an average of all the data we had and started from there. Remember ALL sorts of influences can determine what geometery you actually have - worn springs [ front or back , tyre size, luggage / payload.

We set up the test bike with newish front and rear springs shox and started from there. We then tested the stock length [ 350mm ] shocker against the RAM, and then with the 325mm RAM installed - we did the same tests again.

The results are posted elsewhere but there was a significant drop in lap times on each occassion with the RAM.

We then left the Track Warrior to set up the bike as he wished - that's where we came up with the 3/16". HOWEVER, as long as you end up with 63 degrees - that's the OEM setting in a perfect World. depending on ALL the variables above, that's what you need to aim for.

I have a special frame that has been modified to give me a much steeper headstock angle and I'll try that out next year - it's NOT going to benefit Touring types, just something I want to try - along with the Eaton Mini Blower !

Beachcomber
"if at first you don't succeed, you've already been a failure once"
beachcomber is offline  
post #5 of 10 (permalink) Old Oct 21st, 2010, 7:48 pm
Rookie
 
Join Date: Nov 2008
Location: Washington, PA, USA
Posts: 33
Wow BC, sure beats my "about 1/2 inch ought to do" approach. But the end result is about the same.
Before altering the steering head angle, have you done anything about the rubbery feel to the handlebars? That seems to be the one piece of the puzzle that takes away some of my confidence in the tight stuff.

87 K100LT
97 R850R
00 KLR650
03 KDX220
bpbiker is offline  
post #6 of 10 (permalink) Old Oct 21st, 2010, 8:18 pm
PsyKotic Waterfowl
 
Join Date: Aug 2006
Location: Seattle, WA,
Posts: 1,328
Quote:
Originally Posted by bpbiker
Wow BC, sure beats my "about 1/2 inch ought to do" approach. But the end result is about the same.
Before altering the steering head angle, have you done anything about the rubbery feel to the handlebars? That seems to be the one piece of the puzzle that takes away some of my confidence in the tight stuff.
a) Replace the rubber bushings.

b) Use a K75 upper fork tree as K75 handlebars are solidly mounted. Note that you'll probably get more vibration in the handlebars if you go this route.

c) Not sure if it works on a K100 but on a K1100 you can add some washers to the underside of the bushing which really firms up the steering.

Last edited by FlyingDuck; Oct 22nd, 2010 at 7:00 am.
FlyingDuck is offline  
post #7 of 10 (permalink) Old Oct 22nd, 2010, 5:59 am
Member
 
beachcomber's Avatar
 
Join Date: Jun 2010
Location: Redditch / Reichenau, , UK and Germany
Posts: 65
Duck has of course given you the correct info .......................................my solution - a little more radical

However jesting apart - it does make a significant contribution to the overall feel - especially if the rubber bushes have passed their sell by date - nothing lasts forever.

Two of my projects have Clip-Ons - improvement again - but obviously NOT for everyone.

re: your 1/2" - as stated, due to all the other variables there is NO such thing as a base setting - it's what works for you.

My "special" frame has the head angle reduced by around 4 degrees.


Beachcomber
"if at first you don't succeed, you've already been a failure once"
beachcomber is offline  
post #8 of 10 (permalink) Old Oct 24th, 2010, 9:27 pm
Rookie
 
Join Date: Nov 2008
Location: Washington, PA, USA
Posts: 33
Thanks guy for the suggestions. Looks like new bushings is the place to start.
Looked them up on Max BMW fiche. Lists them as four items. I would have thought just 2??

87 K100LT
97 R850R
00 KLR650
03 KDX220
bpbiker is offline  
post #9 of 10 (permalink) Old Oct 25th, 2010, 11:11 am
PsyKotic Waterfowl
 
Join Date: Aug 2006
Location: Seattle, WA,
Posts: 1,328
You should just need the rubber bushings: 32712307364 x 2
FlyingDuck is offline  
post #10 of 10 (permalink) Old Oct 26th, 2010, 7:55 pm
Rookie
 
Join Date: Nov 2008
Location: Washington, PA, USA
Posts: 33
Thanks Duck. Got them ordered. Now putting them on the to do list.

87 K100LT
97 R850R
00 KLR650
03 KDX220
bpbiker is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the K-Bikes.com - Excellence in Motion forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Rear Shock Setting on '02 KRS GoldRush K1200RS/GT (Classic) 5 Jul 2nd, 2010 1:02 pm
1999 K1200RS brake pads and rotors (where do you guys generally get parts?) donnatello K1200RS/GT (Classic) 34 Nov 12th, 2009 5:17 am
showa rear shock HughWilliam Other K-Bikes Discussion 0 May 26th, 2008 5:14 am
Rear Shock MIMrBill Other K-Bikes Discussion 9 Oct 17th, 2006 11:11 pm
K12RS Ohlin rear shock install Pathogen7 Technical, Repair and Maintenance 4 Jan 26th, 2006 7:27 pm

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome