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SrSuntour Durolux RC2 Damper Overhaul

The SrSuntour DuroluxRC2 Damper overhaul. How to take your damper out, change the oil and put it back together again. The quick service damper is very simple to check the oil level and consistency. However as its a closed system, its not necessary to overhaul your damper often. Please keep your suspension in top notch condition. RideOn!

55 Comments

  • + 1
 Nice vid Niko! Suntour should give you a job :-)
Serviced mine a few months ago, using your older vid, had to email Suntour for the proper oil volume, and now you made this... Love my Durolux (better than my previous RS Lyric) been racing some DH on it also, great performance and value! Keep up the good work, ride on!
  • + 1
 Thank you very much brother! Im glad my videos came to good use. Sorry I made this a little too late, hahahha The Durolux is a great fork, after this oil change mine is still working beautifully! RideOn brother!
  • + 1
 now some questions Smile
did you set yours to 160 or 180 mm of travel?
is the air spring optimized for one setting, what's the diferrence? (i would run mine in 180 if i get it)
any volume spacers in, did you cut some of the spounge, how much oil inside?
does small bump compliance vary from 160 to 180 setting?
thanx Smile
  • + 1
 Hey buddy!
Well first this was a damper overhaul so, I didn't touch the travel.
However, I have mine set at 170mm.
It just feels best with the geometry of my bike.

I have run this fork as low as 140mm and the air pressure feels the same.
The biggest difference would be the geometry of the bike for how much air you need to how much travel you ride with.
At 180, this fork feels really plush but can be run as stiff as you like with air pressure and compression settings. I run mine with about 15-20% sag. It feels good for all around riding with big jumps and drops!

The air side settings are very easy.
It comes with a yellow spacer to allow for a progressive ride.
I never cut it as I like my fork to ramp up without a bottom out.
Im running about 30cc of oil in the air spring to also help with a smooth progressive feel.

The small bump compliance is superb on this fork, for me at least!
From 160-180 I never really felt a difference in the ride of the fork, small bump compliance or bit hit ability.
However, at 180 you would have more sag in mm so 180mm would have better small bump absorption.

You can adjust the sag in a second for more compliance in small bumps with air pressure.
The fork could easily be adjusted with oil volume to run the fork really soft but never bottom out harshly.

Let me know if that made sense!
Just ask me anything else!

RideOn buddy!
  • + 1
 Awesome video Niko, when I was servicing my 2013 damper I manage to remove the upper portion of the compression side making it easier to add oil, pouring from the top instead of splitting damper in half. I noticed also as someone mention on one of the comments, when adding 72cc of oil as recommended by a Suntour rep I could only compress the shaft about 1/2 inch with the H/L set at full open. At exactly 65cc of oil I can compress the damper shaft in at 7 inches and notice the changes in stroke when going form -/+ on the compression settings. Have you noticed this also?

Gilbert
  • + 1
 Hi Gilbert! Thank you very much! Yes, I would like to do the same but it hard because if it loosens from the middle then here is no place to grasp the damper to loosen the top cap! But, ideally the top would be the best. Thank you for the advice. I actually filled mine with 80cc, then slowly drained as I thought needed to get just full travel. I want it to be as progressive as possible. So, it might actually be about 65cc now, hahahah As for the compression, I have been on this fork for a year and half now and changed the oil when it was still kind of new. I upped it to 15wt oil as I was feeling the rebound was not strong enough for me. It still is weak, I run my rebound fully 2 clicks from fully closed at 96psi. I would like to have the range some place in the middle! Other than that, the fork is fantastic! Super plush and takes the hits with ease. I also am riding the Durolux rear shock and absolutely love it! It rides just like the fork matching the fort and rear! It reminds me of my old Roco air! RideOn Gilbert and thank you again, the more information the better! Nicholas
  • + 1
 Nice one niko.. reminds me how i need to crack open the 40's! The oil residue on the sliders after a ride looks like mud.. hahaha! Super mellow vibes and fun post ride. Would look forward to more instructional goodness from the niko!
  • + 1
 I want to do more instructional video content as Im always fixing something. However it takes time to film and edit too,hahahhaha I have the ability to teach more through videos just need the application to make it worthy for me! hhahahha This video, on how to overhaul the damper has been requested by many over the last year. I finally go around to doing it! hahahahhaha Its fun for me so If had access to the 40's I would love to do a video to maybe help you out. However, Im fully confident you can do it!
  • + 2
 Cheers brew! I have a request.. please do instructional video on how to keep the wife happy and ride my bike everyday.. hahaha!!
  • + 1
 hahahhahahha Im going to have to do that! I love it! I will get the engines glowing to burst a storyline, ahhahahhah But, in all truth. I don't have to do anything. Hiroyo is very trustworthy of me and puts no speculation on what I need to do. I teach 7-8 classes monday to friday. Then unless there is a decided event Im free to do as I please. However, I love spending time with the family and kids, so there is a lot I do thats not connected with biking. Sorry to ramble.
  • + 1
 I know mate.. I am lucky in that regard as well.. having kids into riding helps too!
  • + 1
 another good video bro!
i noticed a small oil leak from the rc2 knobs(that's weird), so i opened the damper the oil level was 50ml.
i only had 7.5W oil so i used it and fill 60ml. more than that i cant get full travel.
and on the air chamber I've put 10cc 80W gear oil. will test it on Tuesday, desert ride!!! Razz
  • + 1
 Good work brother! Let me hear how the desert ride went brother! My damper too leaks a little oil from the top but I dont think its a problem. Its just very little! RideOn bro!
  • + 1
 So the damper is a closed system but still an open bath damper. This is the best system in my oppinion. It would be easy to change the compression shim stack as well. This is a well thought out fork! Your instructional video makes the oil change look easy. Ride On!
  • + 1
 Thank you Greg!
The damper is very smooth and thought out to perform with the big boys.
I was a diehard Marz boy for years and to be riding this means a lot to how I like a buttery ride both front and rear!

The shims are very easy to change as it all come apart simply.

You are now running the RC3 on your 55 right?
Its a great open bath system, one of its kind in the fork arena.

Well the TST damper and this about almost identical.
Other than the hight speed compression the dampers configurations are the same.

RideOn brother!
  • + 1
 Thank you for the video...now I can follow your video to overhaul my Durolux RC2 Big Grin
by the way, do you use fox 10mm spacer to adjust your fork travel to 170mm? I've plan to adjust mine to 170mm as well Smile
  • + 1
 Cool! Im glad I can help! Yes, you can use a fox 10mm spacer, I just made a plastic spacer using a pvc pipe. But, if you have fox spacers that would be great! I think the fork feels best at 170mm for my bike. Good fun brother! RideOn!
  • + 1
 I have 2 Durolux forks and are in new condition but when I called Suntour they quoted me $220.00 for the R2C2 dampner. Anything cheaper around?
  • + 1
 For the damper, here in Japan they quoted me 28000 yen which would be about the same. I don't know of another company that makes an aftermarket damper for the durolux. That would be to know if there is!
  • + 1
 thanks for the vids... before i cant seem to disassemble the compression dials from the top. afraid to break something.. but will try it as soon as i can.. Arigato!
  • + 2
 Thank you buddy! The top caps, the compression dials are on tight but they will pop off if you pry them! RideOn!
  • + 1
 Well done. A refreshing change from the stale videos SRAM posts for their forks.
  • + 1
 Thank you brother! I happy I was able to make a brighter video rather than something stale, ahhahhahhah RideOn!
  • + 1
 Thanks for putting this video together. I just got a durolux setup on my bike.
  • + 1
 Very cool buddy! Lets give it a go! RideOn.
  • + 1
 Cool New Update Oil 10W ok Rock shox Domain Oil New Power 5 W Fast !! Big 180mm !
  • + 1
 Yes, that makes good sense! Please give a go! RideOn buddy the Domain is super cool!
  • + 1
 will it damage the fork if I use a thinner oil like a 4wt
  • + 1
 In the damper or in the fork as lubricant?

If you have the new damper the standard oil is now 2.5 for in the damper.
If you have the older version like mine in this video the standard oil is 10wt.

Using 4wt will not damage the fork but you will not get proper damping, in other words with your rebound fully closed it would still be too fast, if its the older version RC2 damper.

Does that make sense?
  • + 1
 yes I rebuild them to day but wanst sure if I was meant to put oil in the lower legs
  • + 1
 Yes, you can use either grease like I did in the lowers or you can use oil. I use just grease because thats how it came and when I take it apart again there isn't oil dripping out. But, both will work greatly!
  • + 1
 @nikoniko: So what you're saying is that the smaller the "wt" number does, the more slow the rebound ? Am i right ?
  • + 1
 @vandung2510: Sorry, opposite.
If you have 10wt the rebound damping like rebound will be slower turn for turn than if you were using 5wt.

The higher the wt, the thicker the oil!
  • + 1
 Thank you, the video would be helpful. Super mechanic Niko-san !!
  • + 1
 I want to do a mechanic video with you buddy! We both love suntour and are good at wrenching. Lets make a video together!
  • + 1
 nice video and I like this back music !!! hahaha
  • + 1
 Thank you Yuki! The background music is mellow and fits the vibe in the video. I like it too! RideOn buddy!
  • + 1
 mellow means ??
  • + 1
 What travel is in your fork?
  • + 1
 It can be set from 180mm down to about 100mm if you wanted. I have mine set at 170mm.
  • + 1
 Sounds cool, I started thinking about some single crown fork for freeride.
What is the diameter of the lags?
  • + 1
 Very cool! These could be a good choice for you! The forks legs are 35mm. They are stout and feel stiff enough for me!
  • + 1
 damper oil out to into coffee ??
  • + 1
 Of course! Oil in your coffee makes me extra loopy! WoooWeeee!
  • + 1
 I wish I could do that buddy!
  • + 1
 You need a Durolux first! ahhaahah Actually there are a lot of forks that come apart very similar. So, please give it a try if you have a fork that needs some maintenance. RideOn!
  • + 1
 nice job niko Wink
  • + 1
 Thank you brother! All in good fun! I like doing instructional videos too. I think I want to start doing more!
  • + 1
 RideOn!
  • + 1
 Awesome sandal ride!!!
  • + 1
 I am the sandal man!
  • + 1
 shouldn't you wear socks with sandals while riding lol
  • + 2
 Yes, but Im slow in the head. hahahhahahha Actually I finished the fork on my lunch break so I went of a short 10minute ride. The weather was really hot and humid on that day. However, I will wear socks in my future videos! hahah RideOn!
  • + 1
 Great vid buddy.
  • + 1
 Thank you bud! I like doing all kinds of videos!

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