Real impressive bro can't fault your talent for servicing a dpx2. Fascinated to watch tbh. It's a skill that you have and I admire it, ride well be safe bro
Thanks bud. I'm not the authority on these things and there's dudes/gals who know a lot more than me. It just that many of them don't share it. Keep the rubber side down.
you can get it directly from Fox, or pay a small fortune for one from a retailer : www.polyperformance.com/fox-nitrogen-safety-needle-assembly - you need the short needle. Thank you for checking this out. Please share it! puede obtenerlo directamente de Fox o pagar una pequeña fortuna por uno de un minorista. Necesitas la aguja corta. Gracias por comprobar esto. ¡Por favor, comparta!
Thanks, It's not really something we can do much to prevent. Other than demanding that Fox fix this issue on future models. I've seen techs replace this seal with a quad seal but the effect isn't much different. The other point of air-ingress that I'm discovering is ingested from the main air chamber into the damper through the main piston seal head. Again, not sure what can be done to prevent that. Sorry I couldn't be more helpful here. Maybe the answer is out there somewhere. I just haven't found it yet.
My shock sound kinda like that for about 3 strokes then is silent. Would cavitation do that?. The bike has sat for a while as I have been using my hardtail. Thanks
this is normal for aerated (commonly called cavitated) dampers. sounds like it needs a damper service. I've had great results servicing these and they typically hold up better after I've had them in. The DPX2 will always do this, but the timing between intervals can vary.
That little white silicon ball that is jammed in there requires very careful extraction. You need something pointy and sharp in order to pull that out, slowly work it out, careful not to damage anything else. And don't stab yourself while doing it. I don't recommend doing it.
Thanks! ok, so there's two stages to the problems you'll experience. The first, the oil and air are settled so the first compression might feel like you're hitting an additional bump during the cycle and the rebound will go from smooth to feeling like an uncontrolled spring. after just a couple cycles the oil and air are combined and the dampening will seem less harsh, just characteristically difficult to manage or predict. This will result in inconsistent trail performance. This goes for any shock experiencing cavitation. I hope this helps. Fortunately, you're not likely to damage the internal hardware from riding it this way, at least not in the short term.
man i just got into this hobby. i want to learn everything. can you tell me how much effort and money i need to spend for all these service tools etc... or should i just hire someone to do the job for now and come back years later when i am much more experienced? thank you very much
Hey man, I'm glad you find joy in working on bikes. I would say that this end of bike wrenching is arrived at through years of training and frustration. I have serious amount of money invested in tools. Working on suspension also requires a good deal of daily experience (to compound the frustration and learning) as a matter of course to extend your troubleshooting skills. I encourage you to find work with Fox or Rockshox if you really want to grow there. Working in shops doesn't provide this experience too well as there is usually one dude/gal in the shadows doing this and not training anyone. There are also tech jobs working at places that service suspension, such as Push or Butter Suspension. Once you have that experience, you'll be making your own tools too :) The other aspect of this work is it can be extremely dangerous if you approach it without some training. I hope that helps but also keeps you motivated. We need more good techs in the industry.
I have been trying to find the IFP depth specs for my DPX but I can't seem to find the right one. Is it the same for all DPXs? I can't be, they vary in size and stroke, right? I did punch in the serial number but the data I get isn't very clear. Could you help me?
great vid / helps the fox directions make sense better , just did my 2021 DPX2 and was cavitated after about 50hrs . Do you have any rebuilds for the current 2021+ Float X2 ? they are having similar cavitation issues even sooner than these shocks .
Really apologize for the late reply. we had a kid a few months ago and life has been "out of the shop" so to speak. Thanks for checking out the video. Fox definitely could do a better job with instructions. It helps having been in so many of their shocks, they have a similar approach and I hope that this video fills a couple of the info gaps. Currently I don't offer an service or products for the X2. I honestly don't have any experience with those and will likely refer folks over to Butter Suspension. One of the issues with cavitation is actually the main piston seal with all of these shocks. The IFP isn't charged to a super high pressure and during assembly the main piston shaft inside the shock, which chiefly moves the oil, isn't properly cleaned. Clean or not, this shaft ingests tons of air (from the air spring chamber -higher pressure than IFP) over time and creates this problem. I know, clear as mud. gonna have to do another video explaining the issue. Thanks for your feedback and for stopping by. I appreciate it! - Eric
@@insightbike thanks for the insight , i was able to do a full tear down when i was adjusting the stroke on a brand new X2 and it is similar to older X2 and also similar in problems and IFP to the Dpx2 , the good thing is that X2 has a built in shraeder valve similar to rockshox for pressurizing the Ifp and i found increasing the IFP to 125/150 psi gave overall better feel to the shock and will hopefully extend the life a little more ( the factory charge was about 75/80 psi ( and that’s accounting for any air psi lost when installing a charging gauge ) i think the factory set is appx 100psi for 2021+
Can you tell me what parts you used for your nitrogen fill system. I know where I can get a tank but the regulator and lines I’m still shopping for. Same with the nitrogen fill tool, I know where I can get that too. How long do you hold the shock on the system and how fast does it fill up? Also do you have the fox needle tool for filling nitrogen on fox dps shocks during damper rebuilds? The shop I work at doesn’t have a nitro fill system and I want to buy and set up my own so I can do that as a side business ( because bike techs get paid a pittance where I work). Did you get certified by fox to do the nitrogen filling? When I talked to them they said they would only sell the needle part once you filled out a waiver. I know where to get it as a 3rd party but I was just wondering.
Do you think it is possible to swap the damper from a DPX2 Performance Elite to a DPX2 Performance? My thought is when it comes time for a full service I would purchase a Elite damper and swap it into my Performance. That is if it is possible.
Yes. I purchases a package of 100 of these IFP seals. The secondary seal that one might consider replacing is the main piston seal head seal, which is a polyurethane o'ring. Check back, I'll post the part numbers and where to find them here soon. The problem with buying the complete service kit is you don't have to do all of that every time. And, it's likely that most people aren't going to spring for the complete set of tools needs to get this job done.
I've added those o'rings to the description, with links. The IFP seal is only available in packs of 100... Good luck. This seal is the same o'ring found in Fox's DPX2 damper rebuild kit (Just used one, video coming). It really is one of two dynamic seals in the whole damper. I have rebuilt several of the DPX2 IFP's with this o'ring, with expected good results.
Is it fine to ride cavitated shock for a while? I did do air can service twice while damper was cavitated so around 100 - 150 hours of riding. I don't really notice any change in performance or sound but is it going to damage some parts on the inside that aren't seals?
I think you ought to get that fixed as soon as you can. There's is the off chance that the first few strokes the oil can actually impact the damper circuit and damage it. but that would be a severe situation. The other factor is safety, rebound control will be limited and you might find your shock trying to buck you. Feel free to reach out. My turn around time in house on these is about 2 days. - Eric
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
Real impressive bro can't fault your talent for servicing a dpx2. Fascinated to watch tbh. It's a skill that you have and I admire it, ride well be safe bro
Thanks bud. I'm not the authority on these things and there's dudes/gals who know a lot more than me. It just that many of them don't share it. Keep the rubber side down.
Very informative video, I guess this is a weakness of the IFP system, you just gave me the reason to upgrade my DPX2 for a Topaz
No problem Luis. Not all IFP systems have these issues. It just seems to be an issue with this model… hope you enjoy that Topaz!
amazing video you just saved me a couple hundred bucks
El mejor video explicado rapido de mantenimiento del DPX2, DONDE COMPRÓ LA AGUJA?
GRACIAS Y SALUDOS
you can get it directly from Fox, or pay a small fortune for one from a retailer : www.polyperformance.com/fox-nitrogen-safety-needle-assembly - you need the short needle. Thank you for checking this out. Please share it!
puede obtenerlo directamente de Fox o pagar una pequeña fortuna por uno de un minorista. Necesitas la aguja corta. Gracias por comprobar esto. ¡Por favor, comparta!
good stuff ! 👍👍...just bought a trek fuel ex8
what a cool bike!
Interesting video. What is the usual root cause of this failure? And what can I do to prevent this in my DPX 2 Factory
Thanks, It's not really something we can do much to prevent. Other than demanding that Fox fix this issue on future models. I've seen techs replace this seal with a quad seal but the effect isn't much different. The other point of air-ingress that I'm discovering is ingested from the main air chamber into the damper through the main piston seal head. Again, not sure what can be done to prevent that. Sorry I couldn't be more helpful here. Maybe the answer is out there somewhere. I just haven't found it yet.
@@insightbike only thing you could do is a vacuum bleed, you'd have degassed oil then, so takes a bit longer for it to get saturated with nitrogen.
My shock sound kinda like that for about 3 strokes then is silent. Would cavitation do that?. The bike has sat for a while as I have been using my hardtail. Thanks
this is normal for aerated (commonly called cavitated) dampers. sounds like it needs a damper service. I've had great results servicing these and they typically hold up better after I've had them in. The DPX2 will always do this, but the timing between intervals can vary.
Any technique for removing the plastic covering the bolts on the bottom of the piggyback?
That little white silicon ball that is jammed in there requires very careful extraction. You need something pointy and sharp in order to pull that out, slowly work it out, careful not to damage anything else. And don't stab yourself while doing it. I don't recommend doing it.
@@insightbike I already stabbed myself so i am on the right track! thanks!
Thank !
No problem!
Nice video dude, what happens to dpx2 when ifp oil gets aerated? Does compression or rebound malfunctions? Thank you
Thanks! ok, so there's two stages to the problems you'll experience. The first, the oil and air are settled so the first compression might feel like you're hitting an additional bump during the cycle and the rebound will go from smooth to feeling like an uncontrolled spring. after just a couple cycles the oil and air are combined and the dampening will seem less harsh, just characteristically difficult to manage or predict. This will result in inconsistent trail performance. This goes for any shock experiencing cavitation. I hope this helps. Fortunately, you're not likely to damage the internal hardware from riding it this way, at least not in the short term.
man i just got into this hobby. i want to learn everything. can you tell me how much effort and money i need to spend for all these service tools etc... or should i just hire someone to do the job for now and come back years later when i am much more experienced? thank you very much
Hey man, I'm glad you find joy in working on bikes. I would say that this end of bike wrenching is arrived at through years of training and frustration. I have serious amount of money invested in tools. Working on suspension also requires a good deal of daily experience (to compound the frustration and learning) as a matter of course to extend your troubleshooting skills. I encourage you to find work with Fox or Rockshox if you really want to grow there. Working in shops doesn't provide this experience too well as there is usually one dude/gal in the shadows doing this and not training anyone. There are also tech jobs working at places that service suspension, such as Push or Butter Suspension. Once you have that experience, you'll be making your own tools too :) The other aspect of this work is it can be extremely dangerous if you approach it without some training. I hope that helps but also keeps you motivated. We need more good techs in the industry.
I have been trying to find the IFP depth specs for my DPX but I can't seem to find the right one. Is it the same for all DPXs? I can't be, they vary in size and stroke, right? I did punch in the serial number but the data I get isn't very clear. Could you help me?
From what I've seen all DpX2's IFP depths are 38mm/1.5". I haven't had a single one that is different. Sorry for the late reply!
great vid / helps the fox directions make sense better , just did my 2021 DPX2 and was cavitated after about 50hrs . Do you have any rebuilds for the current 2021+ Float X2 ? they are having similar cavitation issues even sooner than these shocks .
Really apologize for the late reply. we had a kid a few months ago and life has been "out of the shop" so to speak. Thanks for checking out the video. Fox definitely could do a better job with instructions. It helps having been in so many of their shocks, they have a similar approach and I hope that this video fills a couple of the info gaps.
Currently I don't offer an service or products for the X2. I honestly don't have any experience with those and will likely refer folks over to Butter Suspension. One of the issues with cavitation is actually the main piston seal with all of these shocks. The IFP isn't charged to a super high pressure and during assembly the main piston shaft inside the shock, which chiefly moves the oil, isn't properly cleaned. Clean or not, this shaft ingests tons of air (from the air spring chamber -higher pressure than IFP) over time and creates this problem. I know, clear as mud. gonna have to do another video explaining the issue. Thanks for your feedback and for stopping by. I appreciate it! - Eric
@@insightbike thanks for the insight , i was able to do a full tear down when i was adjusting the stroke on a brand new X2 and it is similar to older X2 and also similar in problems and IFP to the Dpx2 , the good thing is that X2 has a built in shraeder valve similar to rockshox for pressurizing the Ifp and i found increasing the IFP to 125/150 psi gave overall better feel to the shock and will hopefully extend the life a little more ( the factory charge was about 75/80 psi ( and that’s accounting for any air psi lost when installing a charging gauge ) i think the factory set is appx 100psi for 2021+
Can you tell me what parts you used for your nitrogen fill system. I know where I can get a tank but the regulator and lines I’m still shopping for. Same with the nitrogen fill tool, I know where I can get that too. How long do you hold the shock on the system and how fast does it fill up? Also do you have the fox needle tool for filling nitrogen on fox dps shocks during damper rebuilds? The shop I work at doesn’t have a nitro fill system and I want to buy and set up my own so I can do that as a side business ( because bike techs get paid a pittance where I work). Did you get certified by fox to do the nitrogen filling? When I talked to them they said they would only sell the needle part once you filled out a waiver. I know where to get it as a 3rd party but I was just wondering.
Hey Bob, shoot me an email. Go to my channel and then about page. you'll see it there. Thanks - Eric
i have the same problem with that sound in shock :(
The problem eventually manifests in all rear shocks. The disappointing factor here is how quickly it presents itself in the DPX2.
Do you think it is possible to swap the damper from a DPX2 Performance Elite to a DPX2 Performance?
My thought is when it comes time for a full service I would purchase a Elite damper and swap it into my Performance. That is if it is possible.
I haven't looked into that. Great Question! I'll investigate. It probably as simple as changing out the basevalve.
@@insightbike that would be awesome if you could find that out. You already have all the tools on hand 😅. Thanks
Is it possible to buy separetly ifp seal or i need to buy full service kit?
Yes. I purchases a package of 100 of these IFP seals. The secondary seal that one might consider replacing is the main piston seal head seal, which is a polyurethane o'ring. Check back, I'll post the part numbers and where to find them here soon. The problem with buying the complete service kit is you don't have to do all of that every time. And, it's likely that most people aren't going to spring for the complete set of tools needs to get this job done.
I've added those o'rings to the description, with links. The IFP seal is only available in packs of 100... Good luck. This seal is the same o'ring found in Fox's DPX2 damper rebuild kit (Just used one, video coming). It really is one of two dynamic seals in the whole damper. I have rebuilt several of the DPX2 IFP's with this o'ring, with expected good results.
psi
'?
I just bought another shock instead. 175 without shipping for a rebuild is insane.
Just one thing, that's aeration, not cavitation, cavitation is when the oil boils from vacuum.
We just have to get the guys on the Fox hotline to use the correct terminology.... thanks for contributing.
Is it fine to ride cavitated shock for a while? I did do air can service twice while damper was cavitated so around 100 - 150 hours of riding. I don't really notice any change in performance or sound but is it going to damage some parts on the inside that aren't seals?
I think you ought to get that fixed as soon as you can. There's is the off chance that the first few strokes the oil can actually impact the damper circuit and damage it. but that would be a severe situation. The other factor is safety, rebound control will be limited and you might find your shock trying to buck you. Feel free to reach out. My turn around time in house on these is about 2 days. - Eric