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my old/new DHR and a setup question

Nick

My name is Nick
Sep 21, 2001
24,027
14,640
where the trails are
(excuse crappy cell phone pics)

I've been collecting parts and building this up over the winter. I just finished putting it together last night after getting the frame back from being stripped and re-coated. (I bought the frame used and it was really beat.) Aside from trimming my brake lines, tuning the suspension and general tweaking its finally ready to go.



The frame is an '08 medium with a DHX5. I bought an RC4 but found after the fact that the reservoir was too large and it didn't fit. I haven't had any runs on the bike yet but I do believe there is something wrong with the DHX, it feels dead and the rebound is too slow even when wide open. I like the shock and fork more quick and 'lively' but I cannot get the rear to feel the way I'd like.




I'm about 200# ready to ride. I have a 450# spring on the shock, ProPedal off, about 150# psi and the BO chamber full open. Any setup recommendations for this frame/shock are welcomed.


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stoney

Part of the unwashed, middle-American horde
Jul 26, 2006
21,596
7,245
Colorado
Get a Yeti?

But in all seriousness, just fire the shock off to Push. Get your shock issues fixed and your own custom setup back.
 
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Nick

My name is Nick
Sep 21, 2001
24,027
14,640
where the trails are
I guess I was just hoping to get a better idea of what the stock DHX would do before sending it off, if nothing else to be able to describe what I didn't like about the ride.

The cost of a Push factory tune is still much less than a new shock. Looks like that will be the plan. I'll keep tweaking it and experimenting until I can get it serviced.

I should have done this over the winter! :doh:
 
Dec 7, 2009
197
0
Cloud Kiwi
The DHXc 5 might need some loving, however check your sag, the DHR esp that model requires little setup of the shock other than sag!

I think ya spring rate is low, I'm around that weight and I run a 550lb spring with 30% sag.

ideal imo is 30% on this model DHR.
I run 150psi in the BV also, pretty fast rebound and have not adj and thing else from stock.

I have no issues running fast enough rebound and since Ive been on her I definitely run faster rebound now than I would have in the past on this and other bikes, so you should be able to dial that in if the shocks working correctly not damaged or in need of service.

Have a read of Dave Turners post here, post # 18 scroll down and it pretty bang on.

http://forums.mtbr.com/showthread.php?t=422636

Regardless of what people say of the DHXc and its not my fav shock either but it can work well if the bike is setup correctly this just doesn't refer to the shock, i ya fork is badly setup then the shock will also feel that and the ride won't be balanced.

Also, just some basics on the DHR maintained wise if you want it to last well and not have many of the issues people have targeted in the past, mainly lack of knowledge or maintenance!

Replace the rear reducers DU when needed or now with IGUS bushing and a 3pce to replace the 2 pce reducer, this will stiffen but also reduce eliminate the slop that is a weak point with that model DHR. check here!
http://www.tftunedshox.com/info/mount_kits_bushings.aspx

scroll down to the heavy duty mounts!

Don't use to thick a grease to lube the stout link and main pivot otherwise it won't penetrate the needle bearing and remove crap and more importantly moisture and relube. after 2 seasons I'm still on the originals, I do mine every 4 rides, and after every wet ride its easy to and preventitive!

I replaced all my shock & link bolts from stainless steel to high tensile steel, keep em clean so they don't rust of spray em, but this is also one of the biggest things I think ya can do to improve the under sized bolts to maintain the correct tension without stripping the bolts and nutz, way cheaper too.

The bike is awesome enjoy.

Check ya SAG.............
 
Dec 7, 2009
197
0
Cloud Kiwi
If possible before sending it off def check what Ive suggested before hand otherwise you might end up with the same result, not because its not a good idea but you are working off the wrong base figures. Push can't read minds and work miracles, they can only go off what you give them. Better the info [accuracy, the better the tune will be and better ROI]

ps Bike looks awesome btw.
 

gurterno

Chimp
May 8, 2010
32
0
Awsome bike! One of the nicest frames ever made if I may say so (I've got a gray large one myself :) )

Just a stupid question, have you tried fitting the shock backwards. I know a few people solved the problem that way with s*toys. Don't know if they needed extra mods. I would be very curious to hear if it fit. In that case I would get a RC4 myself.

Check here:
http://forums.mtbr.com/showthread.php?t=686654
 
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toodles

ridiculously corgi proportioned
Aug 24, 2004
5,502
4,752
Australia
I switched to a Vivid 5.1 on my DHR when I had it and loved it. Its a pity the RC4 doesn't fit as I've found that shock to be a vast improvement over my old DHX5.
 

Nick

My name is Nick
Sep 21, 2001
24,027
14,640
where the trails are
thanks GPP. Sag is about 1" with the 450#, +/- a hair.
I wish I could shuttle this afternoon. I'm dying to ride!

toodles: can I assume you went with the lightest compression tune? (is that "A"?)
 
Dec 7, 2009
197
0
Cloud Kiwi
i2i 245mm [9.5"]
30%
= 73.5mm when correctly centered on bike in gear, shoes what you ride in etc!

1" um, must be measured off shock stroke right?

Easiest way to measure sag for em or this is how I do it, I measure center to center from shock bolts, static, no rider or load, total length is 245mm if correctly sprung should be minus 73.5mm 4 30%, get someone else to re-measure you should get 171.5mm loaded e.g with me and all my race/ride gear on inclu Helmet..

I guess you're trying to measure the stroke @ 30% harder to do just my experience maybe not as accurate, just saying, .01 of an inch can be a bit in inches still ya sound like youre close.

Seems like its the shock, DHR def likes a bit more rebound once dialed in it can def handle it and is faster in and out of corners poppy and more controlled, less packing up the faster ya ride Ive found. I used to run really slow rebounds as a rule on the rear, but this baby just loves the wick turned up.:D

I guess this is based off the ti spring in the piccs's, I also run about 2 clicks of pp but not for pedaling more for compression mid stroke of shock, while not a fan of the DHXc Ive really got no complaints about it, but I am more of a RS fan, run a Boxxer 2, 10v2 Team.

Also another tip when re tightening those link bolts, do so under load e.g not in the bike stand, reassemble in the bike stand but once done then let the bike rest on its own weight before nipping up those link bolts/nutz.

I hear ya on a ride its pissing down cats n dogs here just over the wet season already here lol.

Also Vivid 5.1 is my next shock with obtainium/k9 spring bearing if I can get a hold of one.

Bummer ya can't get out on her, you'll love the bike once ya get her dialed. Great specc ya got on they're as well, been running that gen Saint rear d now for awhile too awesome kit on the DHR, tucks nicely away behind the rear dropout on the cs, been impressed with it, cheers.
 
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davep

Turbo Monkey
Jan 7, 2005
3,276
0
seattle
i2i 245mm [9.5"]
30%
= 73.5mm when correctly centered on bike in gear, shoes what you ride in etc!

1" um, must be measured off shock stroke right?

Easiest way to measure sag for em or this is how I do it, I measure center to center from shock bolts, static, no rider or load, total length is 245mm if correctly sprung should be minus 73.5mm 4 30%, get someone else to re-measure you should get 171.5mm loaded e.g with me and all my race/ride gear on inclu Helmet..

I guess you're trying to measure the stroke @ 30% harder to do just my experience maybe not as accurate, just saying, .01 of an inch can be a bit in inches still ya sound like youre close.
.

This is completely wrong for many reasons...
 

Nick

My name is Nick
Sep 21, 2001
24,027
14,640
where the trails are
guys, seriously ... I know how to set/measure sag, and I don't measure down to the .01 of an inch.

My comment came from the fact that the shock is slow to rebound with the rebound adjuster dialed full out. That won't stop me from riding!

(plus the shock is going in for rebuild and tune in a couple of weeks. done, and done)
 

gurterno

Chimp
May 8, 2010
32
0
I'm very curious to see if an RC4 would fit backwards, with the reservoir to the rear. If you have the shock could you test it. Like this guy is doing with his stoy:

 

Nick

My name is Nick
Sep 21, 2001
24,027
14,640
where the trails are
Butch-
Thats why I believe the shock is toast. With everything backed out and about 100psi in the chamber the shock performs like the PP and rebound is dialed half in, or more.

edit: to add; I can cycle the rear end through it's travel with the shock removed, so the pivots are not binding.
 
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bizutch

Delicate CUSTOM flower
Dec 11, 2001
15,928
24
Over your shoulder whispering
OK. I was going to point out how ridiculous that setting would be if you "thought" those settings were right. But I get it now. I am 180-190 and have drawn a blank on what spring(350 or 400) that I ran.

The bike is definitely lively and with the DHX 5.0, I ran very little rebound. About 4 clicks in from full out. 125 to 150 psi and roughly 2 1/2 turns on the Pro pedal. 1 turn of Bottom out...sometimes bordered on two if the course was huckerific or really open without lots of medium hits.

That being said it will ride low until you're really, REALLY pointed down. Once you get on some steeps, it doesn't have that feel of excessive sag.

But if you've tried similar settings to what I had and it still responds like a turd, off it goes to Darren.