Technical Discussion Topics related to Technical Issues

Front Suspension Adjustment Help?

Old 07-23-2006, 10:01 PM
  #1  
Senior Member
Back Marker
Thread Starter
 
SillyHawk's Avatar
 
Join Date: Nov 2005
Location: Playa Del Rey ,CA
Posts: 222
SillyHawk is an unknown quantity at this point
Front Suspension Adjustment Help?

Ok i have been riding for years but still have no idea how to set my front suspension to my weight and riding conditions. i do most of my riding on the mean streets of Los Angeles where there are plenty of potholes to dodge and cars to weave in and out of! and of course the occasional twisty canyon run. i am 200lbs of solid muscle...haha not really but i am 200lbs.

i have heard the forks on a Superhawk have a tendancy to bottom out and i should get the RaceTech springs replaced but money is an issue right now so i need to deal with the stock set-up for a while. so i want to make it the best it can be...

I have heard the terms "Rebound Damping" and "Spring Preload" being thrown around...all i know is they are the two ***** on the tops of the forks and how to turn them.

so please if any hawks are still out there with bone stock forks i would appreciate your help
SillyHawk is offline  
Old 07-23-2006, 10:19 PM
  #2  
Senior Member
SuperBike
 
Join Date: Nov 2005
Posts: 1,011
EngineNoO9 is an unknown quantity at this point
I'd say with stock forks just crank up your preload and your dampening all the way up with stock. the lil adjusters on top of the forks are your dampening and at the top of the forks you can see lines around the forks and that's your preload setting. To adjust that you turn the top clockwise. also crank up your rear shock preload and dampening.
EngineNoO9 is offline  
Old 07-23-2006, 10:36 PM
  #3  
Senior Member
Back Marker
Thread Starter
 
SillyHawk's Avatar
 
Join Date: Nov 2005
Location: Playa Del Rey ,CA
Posts: 222
SillyHawk is an unknown quantity at this point
really, so crank them both up all the way...wont that be a very hard ride? or is that just the only way to get the max performance out of these weak forks?

do i need a special tool to adjust the preload

right now the preloads are showing at about the 3rd groove...should i turn them until they are down to none or zero?
SillyHawk is offline  
Old 07-23-2006, 10:56 PM
  #4  
Senior Member
SuperBike
 
Join Date: Nov 2005
Posts: 1,011
EngineNoO9 is an unknown quantity at this point
eh I'm at .95kg springs in the front and a aftermarket shock and it's just fine imo *shrugs* to adjust the preload you use I think a 10mm wrench. it should fit right on and twist them. Try going down to like 1 groove left but crank the dampening up. I had my rear preload at 1 down from the highest and highest dampening. still felt spongy
EngineNoO9 is offline  
Old 07-23-2006, 11:57 PM
  #5  
Hmm?
SuperBike
 
marmaladedad's Avatar
 
Join Date: Oct 2004
Location: San Gabriel Valley
Posts: 2,069
marmaladedad is on a distinguished road
IIRC, it's a 14mm wrench to get at the preload adjusters.

Changing your preload will help only a little bit. If you are far out of the adjustment range, as am I (235lbs), then it doesn't really matter what adjustments you make. For now, you can crank up the preload, but your best bet is to throw in springs that have a higher rate.
marmaladedad is offline  
Old 07-24-2006, 12:57 PM
  #6  
Senior Member
Back Marker
 
Join Date: Jun 2004
Location: East Tennessee
Posts: 208
99Hawk
Silly
Head on over to Hawkriders web side (Greg's Literbikes), Look under 'Performance Mods' > 'Suspension Setup'

Knowing how to get it right is important - it lets you know how far out the stock springs.
Those springs don't even hold the bike up to spec without the rider. If I remember correctly - the front sag should be about 28mm (no rider weight) and 35mm with the rider dressed out in riding gear.
99Hawk is offline  
Old 07-24-2006, 07:09 PM
  #7  
Sprung
World Champion
 
Hawkrider's Avatar
 
Join Date: Dec 2004
Location: Fulton, MO
Posts: 105,285
Hawkrider will become famous soon enoughHawkrider will become famous soon enough
Thanks for the props, yo! hehehe

Crank the preload to max. DON'T max out the rebound. Set rebound so when pushing rapidly down on the forks (in the garage) and releasing, the front of the bike comes back up and settles just a tiny bit. Too much rebound damping will tend to pack down the suspension on a series of bumps.

Unfortunately we don't have compression damping adjusters on our forks so you'll have to make due for now. Maybe a slightly lighter oil would help, but that's pretty labor intensive and it sounds like you don't want to go that direction right now.
Hawkrider is offline  
Old 07-24-2006, 08:50 PM
  #8  
Senior Member
SuperSport
 
Join Date: Mar 2005
Location: Laurel, MD
Posts: 758
jschmidt
Buy the springs. They're transformative.
jschmidt is offline  
Old 07-25-2006, 09:54 AM
  #9  
Senior Member
SuperSport
 
CNI Dawg's Avatar
 
Join Date: Sep 2005
Location: Dallas, TX
Posts: 882
CNI Dawg is an unknown quantity at this point
Originally Posted by jschmidt
Buy the springs. They're transformative.
+1 true true


Drop those heavier springs in it & change the fork oil while you've got it open. Some people use Mobil 1 ATF for fork oil - it's about 10wt (the recommended wt)
Also:
You might end up having to add a couple of shims to the stock compression valve shim stack & one or so to the rebound valve shim stack.

Check out this site for spring rates (springs retail for $109 you can find them for $89 if you look)
http://www.racetech.com/evalving/eng...ngname=english

There was several threads on the old site about fork work but I can't find them for you now....may have gotten lost when we moved sites....sorry :-(
CNI Dawg is offline  
Old 07-25-2006, 10:14 AM
  #10  
Senior Member
SuperSport
 
CNI Dawg's Avatar
 
Join Date: Sep 2005
Location: Dallas, TX
Posts: 882
CNI Dawg is an unknown quantity at this point
CNI Dawg is offline  
Old 07-25-2006, 10:16 AM
  #11  
Senior Member
SuperSport
 
CNI Dawg's Avatar
 
Join Date: Sep 2005
Location: Dallas, TX
Posts: 882
CNI Dawg is an unknown quantity at this point
CNI Dawg is offline  
Old 07-25-2006, 12:13 PM
  #12  
Senior Member
SuperBike
 
Join Date: Nov 2005
Posts: 1,011
EngineNoO9 is an unknown quantity at this point
yeah I got .95kg in the front thrown in when my front end needed rebuilding. they did the work for me. Cost a lil bit but it was worth it. Only prob then was I need a new rear shock to balance it out. lol. in came the fox shock. Man it's a sickness with modding for me but so far everything has been worth it
EngineNoO9 is offline  
Old 07-25-2006, 08:16 PM
  #13  
Sprung
World Champion
 
Hawkrider's Avatar
 
Join Date: Dec 2004
Location: Fulton, MO
Posts: 105,285
Hawkrider will become famous soon enoughHawkrider will become famous soon enough
Originally Posted by CNI Dawg
+1 true true


Drop those heavier springs in it & change the fork oil while you've got it open. Some people use Mobil 1 ATF for fork oil - it's about 10wt (the recommended wt)
Also:
You might end up having to add a couple of shims to the stock compression valve shim stack & one or so to the rebound valve shim stack.
Negative, Ghostrider. You'll need LESS shims (or thinner shims) with heavier springs. The springs themselves are a form of compression damping. Add shims and you'll have too much compression damping. Adding shims on the rebound side is correct however to allow you to control the heavier springs.
Hawkrider is offline  
Old 07-26-2006, 09:57 AM
  #14  
Senior Member
SuperSport
 
CNI Dawg's Avatar
 
Join Date: Sep 2005
Location: Dallas, TX
Posts: 882
CNI Dawg is an unknown quantity at this point
Originally Posted by Hawkrider
Negative, Ghostrider. You'll need LESS shims (or thinner shims) with heavier springs. The springs themselves are a form of compression damping. Add shims and you'll have too much compression damping. Adding shims on the rebound side is correct however to allow you to control the heavier springs.
Thanks for correcting that Greg !
CNI Dawg is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
lazn
Technical Discussion
5
11-27-2009 07:55 PM
Red_Liner740
Modifications - Performance
16
04-02-2009 08:52 AM
cscrawford
Technical Discussion
16
09-07-2007 08:43 PM
99Hawkboy
Technical Discussion
5
05-17-2006 07:24 AM
AZZKIKER
Technical Discussion
4
03-21-2006 09:43 PM


Thread Tools
Search this Thread
Quick Reply: Front Suspension Adjustment Help?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.