954 fork spring rate advice - Honda Motorcycles - FireBlades.org
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post #1 of 7 Old 10-31-2014, 3:51 PM Thread Starter
 
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954 fork spring rate advice

I am looking for some opinions on spring rate for 954 forks. I weigh 230lb geared up and obviously I am in need of new springs, I have trawled through previous threads on this subject but every thread I read is mainly discussing light weight people...

I live in the uk so the my options are mainly Ktech without importing.

I contacted a suspension tuner called Race lab here in the uk and they have recommended a 9.5n/mm which is 0.96kg/mm based on my weight and street riding..

After reading what you guys are using it seems pretty soft???

Also the manual states Honda pro ss8 which is 10w fluid with an air gap of 73mm or 2.9in would this also be correct for aftermarket springs???
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post #2 of 7 Old 10-31-2014, 4:39 PM
 
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Re: 954 fork spring rate advice

A lot of it will come down to riding style and where you ride. For example, I am track only, weigh 210 and use 1.05 springs. Then there is Jason Disalvo, an AMA Pro racer who weighs about 130, and he also uses 1.05 springs. My advice would be to go to a local shop that specializes in suspension and let them take the guess work out of your setup.
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post #3 of 7 Old 11-02-2014, 7:54 PM Thread Starter
 
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Re: 954 fork spring rate advice

^Cheers for the reply bud^

Anyone else got any input??
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post #4 of 7 Old 11-02-2014, 9:54 PM
 
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Re: 954 fork spring rate advice

im pretty sure raceteck has a thing on their site that you can use to compute the spring rate needed for your weight. the stock spring rate .710kg/mm so the .96 sounds about rite.

i mean it street riding and your going to have a lot more road imperfections to deel with and a really hard set-up probably wont be your best option. might be awesome for a track where your running on fairly smooth n predictable tarmac but the street throws a lot at you. your not going to be running full on balls to the wall on the street all the time so you dont need to worry about blowing thru you suspension on every corner. you need some level of everyday comfort as well. of course there is a happy medium between performance and comfort. on the performance side you might find that unless you upgrade your rear shock or at least its spring your going to be limited by that aspect as well. you really hafta match your front set up to your rear or no dice. a good set-up is all about being even front to back.

and no the stock spring oil levels arent going to apply with aftermarket springs. really oil level has a couple jobs it does and the level or air space has mostly an effect on your bottoming out of the suspension. honda having put pretty soft springs in recommends that level imo because they probably realize a lot of riders arent going to be the 155lbs the springs are rated for. tweaking the level would have mostly an affect on its bottom end harshness. aftermarket springs are going to have a suggested air gap but depending on the rate you can get more or less of what your needs might be by adjusting it slightly.

i have the oem springs on my 954 which i just use for street riding. im in your weight class o its kinda soft but my best advice is even if you get better springs, find yourself a suspension guy. maybe from a local forum or something. or a specialist shop. here i found a retired ama suspension guy thats old and has a butt-ton of experience obviously setting up bikes. it has made all the difference. ive bee on bikes all my life on and off road and am mechanically inclined but the difference between my set-up and his on my 954 was night and day. let me tell you. night and day. so find a guy to help you out. my guy charged me 25$ to put the black art into my set-up n it was hands down the best money ive spent on the bike.

"love is the feeling you get when you like something as much as your motorcycle."-Hunter S. Thompson
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post #5 of 7 Old 11-30-2014, 1:14 PM
 
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Re: 954 fork spring rate advice

here are a couple threads that can help you out...i wound up getting the OEM .90's for a CB1000 from Partzilla:

51401-MFN-D01 SPRING, FR. FORK $39.38


https://www.fireblades.org/forums/art...tallation.html

https://www.fireblades.org/forums/gen...fo-needed.html

03' Blk/Tit CBR 954rr, Erion full system, PCIIIr, Scott's Damper, Vortex Frame Sliders, Galfer SS Lines, Rear Seat Cowl, flapper pinned.
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post #6 of 7 Old 11-30-2014, 2:10 PM
 
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Re: 954 fork spring rate advice

Poor man's spring upgrade, lengthen the shim against the spring in the cartridge and it takes out the slop. 10w oil is fine. Schedule 40 PVC works like magic. I've done it to many Honda's that have the horse and buggy ride.
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post #7 of 7 Old 11-30-2014, 4:06 PM
 
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Re: 954 fork spring rate advice

Quote:
Originally Posted by blunt View Post
Poor man's spring upgrade, lengthen the shim against the spring in the cartridge and it takes out the slop. 10w oil is fine. Schedule 40 PVC works like magic. I've done it to many Honda's that have the horse and buggy ride.

this is what my suspension guy is planning to do on my 954 springs over the winter. he said he has done it to lots of bikes, street and race. he said as long as its not a real huge change that it works like a charm. to put it in perspective, im 215lbs n he says itll be a great set-up. as it sits mine has the pre-load wound all the way up to get me close on riders sag. mine is still kinda mushy n what id consider a soft-medium set-up. ill be able to get a much stiffer set-up once he shims the springs getting me more into performance rather than the comfort zone.

"love is the feeling you get when you like something as much as your motorcycle."-Hunter S. Thompson
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