Front forks - is re-valving necessary? - Wrist Twisters
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post #1 of 41 Old 02-24-2009, 01:47 PM Thread Starter
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Front forks - is re-valving necessary?

In reference to an '02 919, I am currently running completely stock suspension.
I have in my possession a set of .9 RaceTech springs that I hope to install later this year to stiffen up the ride a bit. (still considering a F4i swap though, too)

My question is this: If I install the stiffer springs, do I also need to re-valve?


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post #2 of 41 Old 02-24-2009, 01:49 PM
 
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Depends - if you are just gonna cruise around with the ocassional curvy ride, probally not. But, if your gonna hit the curves and really push the bike yes, you do need them.

As a side note, I put the Gold valve kit in my KLR and could tell a difference leaving the parking lot -Its a bit of cash to lay out, but ,worth every penny - if it made a difference on the KLRasaurs Rex, it would have to really improve the 919 -

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post #3 of 41 Old 02-24-2009, 02:09 PM Thread Starter
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That's kinda what I was expecting (but not wanting) to hear.
I rebuilt my CR250 forks with stiffer springs & a U-max kit from Moto-Pro Suspension a year or two ago.
Amazing results, but I'm jumping that bike. Didn't know how demanding streetbike forks could get
- my front end never leaves the ground.

I'd say about half the riding I do is on curvy roads - or at least as often as possible.
And I'm considering doing a 'try the track' day sometime in the future.
I guess I'll just hold off on the spring install untill I find a valve kit.

Thanks

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post #4 of 41 Old 02-24-2009, 02:25 PM
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I installed a set of 0.85Kg Ohlins springs in my 02.' Ran them for about 2 seasons without any other fork mods. You can read the ride report on my 919 webpage.

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post #5 of 41 Old 02-24-2009, 02:47 PM Thread Starter
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I see you later did a fork swap, did you transfer your upgraded internals to the newer forks?


If that works, I might save up even longer so I can get the valves and a set of F4i forks.
If I'm gonna have forks tuned to my riding specs, I'd rather have the adjustability factor too.

I did some poking around on RaceTech's website, they only list 2002 for the F4i,
but part #'s are the same for 02 F4i, 02-03 919, & 04-07 919 parts and kits.

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post #6 of 41 Old 02-24-2009, 02:58 PM
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Ohlins springs were not compatible with the 06' adj. forks.

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post #7 of 41 Old 02-24-2009, 03:28 PM
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Quote:
Originally Posted by MisterMike View Post
Ohlins springs were not compatible with the 06' adj. forks.
mister mike... what springs would you suggest for a 07 919 with a 235 pound ish.. rider.. because i have checked into this and every parts counter asks questions i can't answer.. i have 0 experience with suspension work...

thanks

Brian



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post #8 of 41 Old 02-24-2009, 04:04 PM
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Quote:
Originally Posted by barton664 View Post
mister mike... what springs would you suggest for a 07 919 with a 235 pound ish.. rider.. because i have checked into this and every parts counter asks questions i can't answer.. i have 0 experience with suspension work...

thanks

Brian
Here ya go Brian. link Plug in your weight.

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post #9 of 41 Old 02-24-2009, 04:18 PM
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brian me and you need a spring rate of 1.0kg

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post #10 of 41 Old 02-24-2009, 05:10 PM
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Quote:
Originally Posted by MisterMike View Post
Here ya go Brian. link Plug in your weight.
Quote:
Originally Posted by edgecrusher4444 View Post
brian me and you need a spring rate of 1.0kg
thank yall ... mike for linking that for me...

and edge for telling me what i needed cause my browser won't open that page...lol..

1.0 kg... hmmmmmm any suggestions as to brand...

and what weight fluid...

and whats the best bang for the buck on the rear?



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post #11 of 41 Old 02-24-2009, 05:18 PM
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Race Tech

Race Tech 1kg. springs:

Part # FRSP S3732100
Description: RT FRK SPR 36.7x34.5x315 1.0kg
Price: $109.99

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post #12 of 41 Old 02-24-2009, 05:31 PM
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Quote:
Originally Posted by MisterMike View Post
Race Tech

Race Tech 1kg. springs:

Part # FRSP S3732100
Description: RT FRK SPR 36.7x34.5x315 1.0kg
Price: $109.99

you sir.. are a gentleman and a scholar!!!

thank you very much..



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post #13 of 41 Old 02-24-2009, 06:28 PM
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Is that the only option? 220 for springs makes me wonder where else I could get some. Plus you can't order off their website right now, whasupwitdat!

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post #14 of 41 Old 02-24-2009, 06:42 PM
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Tag 'em
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Ship 'em to DK.

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post #15 of 41 Old 02-24-2009, 06:43 PM
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Quote:
Originally Posted by edgecrusher4444 View Post
Is that the only option? 220 for springs makes me wonder where else I could get some. Plus you can't order off their website right now, whasupwitdat!
that 109 is per side???????? geez... i hope thats installed!!



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post #16 of 41 Old 02-24-2009, 07:05 PM
 
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110 for the pair. They sell fork springs in pairs...

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post #17 of 41 Old 02-24-2009, 07:10 PM
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Maybe its for a pair, I couldn't tell on their website that is straight out of 1995.

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post #18 of 41 Old 02-24-2009, 08:05 PM
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Quote:
Originally Posted by Sokali View Post
110 for the pair. They sell fork springs in pairs...
(pulse back to normal) okay... 110 aint bad... now to see how much one of my mechanic buddies charge for the work..



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post #19 of 41 Old 02-24-2009, 08:58 PM Thread Starter
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If you're only adding new springs, you should be able to just unscrew the fork caps, remove the old ones, & drop in the new ones.

If you replace the valves, they're on the bottom end, that's when you start really tearing stuff apart & getting messy.

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post #20 of 41 Old 02-24-2009, 09:54 PM
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Quote:
Originally Posted by omaha_919 View Post
If you're only adding new springs, you should be able to just unscrew the fork caps, remove the old ones, & drop in the new ones.

If you replace the valves, they're on the bottom end, that's when you start really tearing stuff apart & getting messy.
does anyone have a pictorial on this... it sounds easy... easy scares me...lol



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post #21 of 41 Old 02-24-2009, 10:00 PM
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click here brian

https://www.wristtwisters.com/forum/s...ad.php?t=15379

I have been looking into upgrading my forks for the last 2 weeks. I just need money now.

Other than price is there much difference in ohlins or racetech springs?

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post #22 of 41 Old 02-24-2009, 10:12 PM Thread Starter
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Nice find zookmor,

Brian, also if you have a factory service manual, it shows the step-by-step process of tearing down the forks.
(Chapter 13, page 13-17 begins the break-down of the forks)
If you order a new valve kit, it SHOULD come with step-by-step instructions on picking the correct shims for your application (weight).

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post #23 of 41 Old 02-24-2009, 10:27 PM
 
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FWIW RaceTech makes 2 kits for the 919: compression and rebound damping.
That's over $400 in parts including the springs.

A better option would be to send it to a suspension shop, like DK http://www.kyleusa.com/

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post #24 of 41 Old 02-24-2009, 10:31 PM
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Quote:
Originally Posted by Sokali View Post
FWIW RaceTech makes 2 kits for the 919: compression and rebound damping.
That's over $400 in parts including the springs.

A better option would be to send it to a suspension shop, like DK http://www.kyleusa.com/
I know you did the upgrade and then had second thoughts, but why? You say it would be better to go through DK, but wouldn't that cost even more. Did you ever go through LE for the rear half?

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post #25 of 41 Old 02-24-2009, 10:37 PM
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Factory manual I got is for a 2002-03 suspension, I sure its not the same as an 06. And why would you need to send it out if you just want to put springs in it to stiffen up the front because Honda makes bikes for guys that are 5'8 and 150 lbs? Don't you just unscrew the top of the forks and replace the springs and maybe the oil? Will replacing those effect the factory controls?

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post #26 of 41 Old 02-24-2009, 10:46 PM
 
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LE charges 500 for labor plus 110 springs, 30 seals, 30 oil, plus tax if you're in CA. Other shops are in the same ball park.

I never got the 919 shock done, since Jim didn't call me back about it. I guess he didn't need to mess with the 919, he does mostly race stuff.

Just look for a good local suspension shop.

If you decide to go with RaceTech, they charge $165 for labor plus parts: compression damping kit, rebound damping kit, springs, seals and oil. About the same as LE.

Some shops like using Ohlins cartridge kits. Add a couple hundred if you go that route.

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post #27 of 41 Old 02-24-2009, 10:50 PM
 
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Quote:
Originally Posted by edgecrusher4444 View Post
Factory manual I got is for a 2002-03 suspension, I sure its not the same as an 06. And why would you need to send it out if you just want to put springs in it to stiffen up the front because Honda makes bikes for guys that are 5'8 and 150 lbs? Don't you just unscrew the top of the forks and replace the springs and maybe the oil? Will replacing those effect the factory controls?
I'm 5' 9" and 155, but this bike was not set up for me...

You don't need to send it in for springs, only if you want a suspension that works properly.

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post #28 of 41 Old 02-24-2009, 10:55 PM Thread Starter
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Quote:
Originally Posted by edgecrusher4444 View Post
why would you need to send it out if you just want to put springs in it to stiffen up the front because Honda makes bikes for guys that are 5'8 and 150 lbs? Don't you just unscrew the top of the forks and replace the springs and maybe the oil? Will replacing those effect the factory controls?
Replacing the springs is easy - I think pretty much anyone who can follow the steps in the manual could do it.
Yes, you unscrew the caps, pull out the old spings, & drop in the new ones.

If you're careful you might not have to mess with the oil level.

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post #29 of 41 Old 02-24-2009, 10:56 PM
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I just wanna take a little weight off the forks when stopping not a race set up. I just worry about bottoming out the forks and causing premature seal failure not to mention a rough ride.

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post #30 of 41 Old 02-24-2009, 11:03 PM
 
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Re-springing should give you that.

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post #31 of 41 Old 02-24-2009, 11:05 PM
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Quote:
Originally Posted by Sokali View Post
Re-springing should give you that.
So are you saying that it isn't worth doing the valves and springs on your own? I am not doing track days at this time, I just want a little better quality ride. I can't miss a suspension that is don't have and haven't had.

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post #32 of 41 Old 02-24-2009, 11:06 PM
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Right on, I just don't wanna f something up over a spring.

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post #33 of 41 Old 02-24-2009, 11:21 PM
 
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Quote:
Originally Posted by zookmor View Post
So are you saying that it isn't worth doing the valves and springs on your own? I am not doing track days at this time, I just want a little better quality ride. I can't miss a suspension that is don't have and haven't had.
The valves are DIY kits, but it's a lot of work. If you haven't worked on forks before, I'd get someone experienced to help out. Otherwise, have a professional take care of it.

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post #34 of 41 Old 02-25-2009, 08:33 AM
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Quote:
Originally Posted by edgecrusher4444 View Post
. And why would you need to send it out if you just want to put springs in it to stiffen up the front because Honda makes bikes for guys that are 5'8 and 150 lbs?
lets see... i am 7" taller and 83 pounds heavier...






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post #35 of 41 Old 02-25-2009, 09:33 AM
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Me too, I just saying it doesn't sound like a send out job for spring change.

This may help
http://fiche.ronayers.com/Index.cfm/..._(%2704-)#

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post #36 of 41 Old 02-25-2009, 10:03 AM Thread Starter
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Quote:
Originally Posted by edgecrusher4444 View Post
Me too, I just saying it doesn't sound like a send out job for spring change.

This may help
http://fiche.ronayers.com/Index.cfm/...FORK_(%2704-)#


Thanks edgecrusher, you helped me out too.
As I was looking at the fiche It suddenly dawned on me -
the answer to my original question at the beginning of this thread...

02-03's don't have adjusters - so there's no need to re-valve... 'cause the're NOT THERE in the first place!

Check this for a comparison to the link posted above.

I'm gonna put my springs in like MisterMike did (thanks Mike)
... and one day I just might end up with some F4i replacement forks.
And if that day comes, the info that I have collected seems to indicate that my RaceTech springs should transfer,
I'll just have to re-valve at that point.

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post #37 of 41 Old 02-25-2009, 10:21 AM
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omaha 919: Just to clarify, ALL cartridge forks have compression and rebound valving. Some are fixed some are adjustable.

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post #38 of 41 Old 02-25-2009, 10:48 AM Thread Starter
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Thanks Mike, I appreciate you pointing that out... I'm just not keeping it all together

I think I'm still going to put in the springs, see how it feels, & go from there.
I'll update everyone when that time comes.

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post #39 of 41 Old 02-25-2009, 11:07 AM
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Quote:
Originally Posted by omaha_919 View Post

02-03's don't have adjusters - so there's no need to re-valve... 'cause the're NOT THERE in the first place!
omaha you can make your forks adjustable..

https://www.wristtwisters.com/forum/s...ead.php?t=4894

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post #40 of 41 Old 02-25-2009, 11:43 AM Thread Starter
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Yeah, I have that thread saved. Much appreciated though.

But I've watched 2 sets of F4i forks go for less than $130.00 in the last 5 days on ebay.
At that price I think it'd be easier & cheaper to just swap the forks as a whole.

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