Suspension
#1
07-06-2009, 11:17 PM
Join Date: Jun 2009
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
Suspension
I posted this question in the Modifications forum but haven't had any responses so maybe it should go here.
I have a 1999 CBR600F4 that is completely stock and used only on the street. I am new to street riding, but have been riding and racing dirt bikes for 22 years. I would say I am a competent street rider, but not yet completely comfortable on the street (meaning I am not used to 100 horsepower and traction all the time).
I understand dirt bike suspension and how to properly set up the machine for an individual rider (utilizing the proper springs and static sag and what the preload, compression, and rebound clickers do). The most important step is making sure the fork springs and shock spring are matched to my weight (140lbs).
I have to say the CBR suspension feels pretty good. I’ve set the rear preload to the stock setting and softened the compression damping and increased the rebound damping. The fork preload and compression has been increased and the rebound slowed (slightly). Haven’t measured the static or rider sag on the bike yet.
From the RaceTech website (which I have used many, many times over the years and trust to be an accurate assessment), it recommends stiffening the fork springs (from .75/kg to .81/kg) and softening the rear spring (from 14.2/kg to 13.5/kg).
Talking to a local suspension shop that specializes in street bike suspension, they feel Racetech is way off and recommended going to .95/kg fork springs (which I know is a HUGE increase), and getting a Penske shock (which is serviceable and easier to change springs on).
My question is, what rate fork springs and shock spring would be best for my weight? Is there another place that accurately calculates spring rates?
I have a 1999 CBR600F4 that is completely stock and used only on the street. I am new to street riding, but have been riding and racing dirt bikes for 22 years. I would say I am a competent street rider, but not yet completely comfortable on the street (meaning I am not used to 100 horsepower and traction all the time).
I understand dirt bike suspension and how to properly set up the machine for an individual rider (utilizing the proper springs and static sag and what the preload, compression, and rebound clickers do). The most important step is making sure the fork springs and shock spring are matched to my weight (140lbs).
I have to say the CBR suspension feels pretty good. I’ve set the rear preload to the stock setting and softened the compression damping and increased the rebound damping. The fork preload and compression has been increased and the rebound slowed (slightly). Haven’t measured the static or rider sag on the bike yet.
From the RaceTech website (which I have used many, many times over the years and trust to be an accurate assessment), it recommends stiffening the fork springs (from .75/kg to .81/kg) and softening the rear spring (from 14.2/kg to 13.5/kg).
Talking to a local suspension shop that specializes in street bike suspension, they feel Racetech is way off and recommended going to .95/kg fork springs (which I know is a HUGE increase), and getting a Penske shock (which is serviceable and easier to change springs on).
My question is, what rate fork springs and shock spring would be best for my weight? Is there another place that accurately calculates spring rates?
#2
07-07-2009, 06:42 AM
Junior Member
Join Date: Jun 2009
Location: Louisville, Ky
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
Alot of people I know start w/ the settings here http://www.sportrider.com/suspension...ngs/honda.html
But they say it's for a 160 lbs rider.
But they say it's for a 160 lbs rider.
Thread
Thread Starter
Forum
Replies
Last Post