Suntour XCT Fork Service - Disassemble/Clean/Lube/Re-assemble
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- Опубликовано: 5 фев 2025
- I show how to tear down, clean, lubricate and rebuild Suntour XCT (SF8-XCT-V2) forks/shocks. Periodic maintenance will help prolong the life of the fork and maintain performance. Basic service to keep your suspension working and from becoming stiff or frozen. This bike is a Raleigh Mojave 4.0. The XCT fork models have varied over the years. I believe this fork is a SF8-XCT-V2 from 2008.
Use grease made for forks. I use Slickoleum which is also sold under the name Slick Honey. You can also use SRAM Butter or Judy Butter. If the fork uses oil, use the proper fork oil. Use of a grease/oil not made specifically for forks can damage the plastic/polyurethane parts, or otherwise leave the fork not working properly.
Slickoleum 15oz:
www.amazon.com...
Slickoleum 4oz:
www.amazon.com...
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This helped me so much and it was the grease that was the problem for me don’t use park tool polymer grease for forks use slickolium
You save my bike
Thanks from Algéria
You are lagend
Dear Mr Guy! Thank you SO much for making this video! My son's front forks were completely seized, but you showed me how to take them apart, and now they're lovely and springy again!
I made the mistake of riding with a seized fork…. Broke my wrist
like, you expected it to spring but it was locked ?@@spoonimations5131
Hey , I’m new to your channel (about 2 weeks) and you have helped me fix my specialized fsr xc comp 2005 and you are straight to the point and no nonsense.
Keep these videos coming!
Thanks RJ
You are definitely helping me to build my masters of bicycle mechanics, you tube should really offer diplomas after a certain number of hours of study lol. I've Been fixing my old bikes up and pasting them on with confidence that thay ride well and are safe, thanks in a lage part to your videos, l'm so confidence in fact i just bought a very rough but complete 1974 RALEIGH grand prix off ebay for $20 to restore.
I clicked on the little bell as requested! Thank you for all your amazing content. I'm rebuilding a trek 3700 mountain bike at the moment and would not of had the confidence to take on this project without you! THANK YOU SO MUCH!!!!!
Thank you.
JUST what I needed!!!!! I can't find tutorials on the XCT ANYWHERE! Thank you good sir!!
I've been watching RJ's videos for a while now and, although I appreciate the information he provides (he's awesome), I always look forward to see what beverages he has on the background :)
A little too heavy on the diet Pepsi, in my opinion.
Very good explanation. Finally someone showed how to lubricate the basic suspension fork.
Timing is perfect have some suntour forks to strip. Down with my son looks alot easier than I thought many thanks for the great videos
My front fork for my bike is just about the same as this fork but I have two springs instead of one the process of taking mine apart is still the same also I got mine apart cleaned and put it back together but thank you for this video RJ cause you have been a big help with everything I know about bikes
Thanks! Just rebuilt my forks after watching this video. Super simple and they’re like new again
Thanks so much! This is what's on my bike. The fork still works great, but I'm wanting to fix it up since it's 10 years old and has never been serviced.
Great job! Thanks for your videos. My suntour M3010 is practically the same as the XCT and I was able to guide myself with no problems. Greetings from Argentina!!🇦🇷
My forks were a little different but I figured it out with the video. I didn't have the extender needed to get a 5mm hex wrench down the fork tube but it turned out that I didn't need to completely disassemble the forks, I was able to slid the forks out to full extension, apply grease, reassemble and everything works now.
Nice & simple fork to overhaul.. great quality video & sound..
Great video. I watched this as my son's XCT fork has started to seize. I bought him a new XCR fork (that's the best I could find for a 24 inch wheel). I thought about servicing the XCT we took off, and selling it, but for such a low value fork, I'm not sure I can be bothered. But great video though.
Thanks RJ I'm going to service my friends xct fork and your video is going to be really useful
Okay I think I'm not going to service this crap, it's totally toast
@@fedi1140 I had the same experience 😉 ended up grabbing a steal from my local bike shop on last seasons forks. Never looked back 😎
Excellent video as AWAYS RJ! Seems like a super simple and easy build inside to take apart and service ourselves, and with your instructions and demo, couldn't be easier. Thank you sir!
Thanks for showing us how to do this!!! I just got a mountain bike off of Craigslist and I am overhauling it.
Can't wait to tackles this task myself. My spring must be bone dry after not servicing for 5+ years. I love lube, my favorite part of the process, can't wait to buy some 'light lube' and slather my spring. Ahhhhh..
excellent video. these forks are everywhere and knowing how to work on them will most definitely come in handy
That's great stuff, RJ - just found you for the first time - will be subscribing! Thanks very much!
Disassemble video about xcm forks would be great
Thanks for taking the time to shoot and share this.
Finally you do these forks !
I think you deserve a "Super Nice!"
Yeah. Finally. Love you 3000.
So great! I have the exact fork on my specialized Hardrock. cool, now I can do the same thing to mine ... thank you very much... Charlie m.
Perfect. I have to do mine now on a second hand bike I bought.
You would do a lot of views with a comprehensive electric conversion. Just saying, you're the boss and decide. Congrats for the 200000 mark, when I joined you were at 30000 or so, fully deserved.
Thanks very helpful cos I have a bike left with me with this type of fork but they are seized.
Just in time for a cup of coffee and a great video by RJ
Hello, Rebuilt my SR Suntour NEX fork/shock and now preload adjustment is frozen. Any ideas on how to free it up? Thank you for all your videos.
hi,good video,but I was wondering if this will fix the problem of my forks squeaking,I have a xcm suntour coil forks and everytime I compress it,it will make a loud squeaking noise which is annoying in the trails or just street riding
Good video buddy! Salutes from phoenix,az!
Excellent video. I'm stuck at the part where I need this crazy long extension part to reach the bottom. Is there a workaround?
I answer myself for future reference :). If you run into this problem extend the fork as far as possible and than you can unscrew the bottom bolt because it wont turn easy any more (you use the pull pressure to hold the counter part). No need for extender.
@@jazzper_nl thanks for the tip. I was trying to hold the threaded shaft from the bottom (outside of) the fork while screwing the bolt on haha
thats much easier than i tought... just the wrench is problem as usual on bikes
How long does the racket extension got be in cm
i own an xct fork but i bought it used and its been modified cut springs and the lockout is unknown and i haven't touch it since then.
Nice demo with the tear down and rebuild 👍🚲🔧
Those are veeery old actually but the process is still the same for XCT and XCM except that the XCT has 2 adjuster caps or a lockout and two springs or one spring and the XCM typically has a lockout and a spring!
I have a 2020 XCT fork, can I just remove one of two springs to make it bouncier? right now, it is just a really heavy rigid fork with zero "suspension".
@@Justmyopinionlol You can (then you have a fater M3030) but i would recommend regreasing ist first as this sounds like a ceased fork
@@Justmyopinionlol in the same situation as you, did you end up taking one of the coils out? If so did it help and does it actually work safely?
I am from Nottingham in the UK where the Raleigh cycle brand hails from.
Cool. I am from Seattle in the USA where Jimi Hendrix, Heart, Pearl Jam, Queensryche, and Soundgarden hail from.
My forks have two springs! When did they start doing that in these forks?
I don't have my ST raidon fork anymore, but I wish there was a service vid like this one back when I had it because getting it serviced cost half of the cost of a new fork and it seemed completely out of proportions.
I was wondering if I could have some help, I have a pair of rst forks that are a similar build to hear suntours. However, when trying to loosen the bolts to remove the lowers, it does not come out and just spins round instead. I have tried shocking the bolt as well as compressing the forks but nothing seems to work
Try finding a video or instructions for your RST fork!
@@RJTheBikeGuy I have. There are none 😂
@@kaankoylu4504 Shrug. I have multiple RST for videos. I own a Honda car, I don't pick up a Ford manual and call Ford saying, my car is similar, how do I fix whatever. Different forks are different!!!!
@@RJTheBikeGuy ok I'm just a bit stuck 😂 thanks anyway
Very helpful. I know what I'm doing next weekend!
Hello im new to mtn biking, and servicing them. O have a Giant brand 2015 boulder 1 bike. , my forks are SR Suntour XCT lock-out, 80mm travel. Is it possible to do a video that shows you how to disaseble an service my type of forks with lock-out? From reading the comments im assuming not all xtc's are the same layout (im still learning) I live in Astralia so im not sure if we have thread locker blue, so what else could i use?
One of these days.
Thank you sir for another informative video. You do a great service to the home bike mechanic, especially those who have older bikes, or less expensive models where the service of their parts such as forks will differ from the techniques used to service a more expensive model.
I'm sure your bike work stand gets a lot of use, what make make and model is it? And how has it held up? Thanks again!
An old used Minoura I bought on craigslist.
Thanks for the super clear explanations, really helpful!
Bearing in mind I use these forks on a mtb ebike conversion for road use only, is there any benefit in fitting a second coil to the empty side?
Can you do a video on how to fix a mongoose brawler BMX bike rear hub mine completely fell apart and the bearing casing got crushed it's a cassette hub
Here is a hub overhaul on a Trek BMX bike. I have other
ruclips.net/video/8rskB6afPLE/видео.html
Hey! Happy to see you again! Have any manufacturers explained why only one spring/elastomer?
Apparently that's enough for light riding.
Less weight. This type of fork is usually up around 2.5kg (@5lb) already, so a second spring would take it way past silly.
After seeing this video a friend took the task of doing the same with her little sister bicycle. He make a mess a got beating by his mom for making cry little sister. Girl got new ride and our friend a second beating for been pathetic and scrooge. Thanks for the joy.
Okay. Why didn't they just put the thing back together???
I got the same fork, recently I bought the Suntour plastic wrench to dissasemble it, but the plastic cap is so seized inside the fork that cannot do a simple turn, I fear the wrench will break if I apply excesive force because is just plastic, how do I solve this seized cap??
Not sure. Haven't encountered that. You can make a tool. ruclips.net/video/tABGvESjL4o/видео.html
Thank you very much for sharing your knowledge, your channel is amazing
I have a couple of questions
How long is the extension?
What is the measurement of the socket 3/8, 1/2?
you're the best
amazing presentation your knowledge is way up there.
Do the forks have oil because Halfords said they do but this video tells me no ?
My spring appears to be stuck inside after taking the caps off. Can’t push the assembly up to pop out the spring like you did. Any ideas or is it just done? (It still works but squeaks like crazy on the single track.)
Can you still lock everything without the coil spring? I want to convert my XCT to a lowered Rigid Fork. Thanks for your answer in advance.
Gracias por enseñarnos como se hace!
Thanks for teaching us how to do it!
Thank for your video, super informative! I am thinking about this little project: My kid's bike has a 20" XCT fork, and it seems to me that the front end sits too low, so I am thinking about adding spaces to raise it. From your video I'd guess they could fit above the plastic parts that go on the bolts that secure the bottles. Does this sound right? I might need to use longer bolts though.
No idea what you are talking about.
@@RJTheBikeGuy 😕
A grinder key works perfect for the caps.
Love all of your videos! 👍
Thank you! This video was very informative!
Congrats very helpful!! I have same bike, and I’m going to make some upgrades on parts. So kind of fork I need to buy? Is there any brads than you can suggest or special reference?? Thanks
You have to do research on what works for you. I don't do recommendations.
I understand that, but I was speaking about a reference to get a right part to this old bike. But thank you anyway. Good luck
Since you were upgrading to the same bike, I thought you could give me some advice before making the purchase.
@@tubosmios There isn't a "right" fork. There are lots of different forks that will work. ruclips.net/video/rUX_cTuk3O8/видео.html
@@RJTheBikeGuy thank you so much
so, I have an XCT-V4 fork and was thinking of servicing it myself, because it developed a really annoying and embarrassing squeaking. But now, with my Amazon cart reaching 50 euros with all the parts needed, and seeing that I also need this long long extension to reach the bolt... oof. It seems to be easier to just buy another one at around 70...
What parts? Try cleaning and lubing it. If parts are worn, then replace them.
@@RJTheBikeGuy Many thanks for the reply! In the end I dropped the order to about 36 - i ordered that key, the grease for the springs (RSP SlickKick), and a RockShox seal to scavenge the tension spring that i broke from it (new seal from Suntour costs peanuts in the UK, but here in Italy would cost me around 25 with delivery).
The performance is fine, so I think the parts are ok. What I think happened is that I was stupid to spray some lubricant around the seals when the squeak was minor. But the the lubricant was similar to WD40, so it contaminated and probably destroyed the grease inside, resulting in constant squeaking and creaking on any surface.
The stuff will arrive sometime next week. I'll have to think where i can borrow that extension in the meantime.
Excuse me sir what size of the spring if I want to change a new spring ?
I love that bike RJ THE BIKE GUY ♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
Thanks a lot.
I have a question, now a days XCT forks are comes with a lockout, this video isn't covered lockout part, can I follow "XCR fork overhauling video" for lockout part?
Probably.
Can we add lockout to this forks
Good job RJ, but what if one wants to modify the forks?
Modify it how? If you want a different fork, install a different fork.
does the spring doesnt stress the fork because of uneven force distribution?? nice work as always
No idea. Probably riding it on a way rougher terrain than it was made for. I didn't design it.
Nice video, RJ
nice job, do you thig oil chain its good for forks, when i tighten a plastic thread i go first anticlockwise until i hear click or i feel that its a the beginng of the thread
Oil chain? Do you mean use chain oil in forks? No, use proper fork oil. The part tightens clockwise. And you have to push down to get it to engage.
Awesome 👏 mountain bike
Hi,
Is there no oil in this fork?
i have a scott yz1 with sr suntour xc-60 that are frozen how do i fix it?
If you have a single spring fork like this, could a person put springs on both sides? Or is the cap side not threaded as well?
Just buy a fork with coils on both sides. I can't remember if it was threaded. But you don't have the threaded cap/adjuster for that side, or the coil. Not sure what else. It's not made for it.
I destroyed my ForkCaps do you know what size are they so I can order new ones? 25.4mm-27.5mm-30mm?
Hey RJ, want to replace my really old worn out SF11-XCT-V3-DS-26 for an air one now that I’m increasing difficulty. Any advise on a good replacement within a reasonable budget? Thanks!
Start researching and shopping.
Those plastic sleeves from Suntour are extremely hard to find. I tried for several months and finally gave up. I asked several bike mechanics who said that replacement sleeves for the cheaper models are unobtainable.
I think these are them: www.srsuntour.us/products/xct-slider-sleeve?variant=27529028163
@@RJTheBikeGuy Thanks. Mine are designed a bit differently on top and I am afraid to buy the wrong ones. Those guys must be getting rich with those prices.
@charles atwell $9 for a pair of sleeves doesn't seem too much. I think I have spent close to that on a single inner tube. Contact Suntour and see which ones you need.
@@RJTheBikeGuy That is 9 bucks each plus shipping. $9 for two would have been OK.
@@charlesatwell9976 Not sure, but I think it might be for a pair. They show two in the photo.
v good yr good at Conveying instructions at the same time get on with it so it's not too boring but very interesting thanks very much
I have a 29r xct with a manual lockout from a 2014 model. My issue is it has the older style lockout with the black lever that switches to green or red. I can not get the lever assembly to remove or find any information on it. Note it is not the newer blue lever style.
I don't know. I haven't worked on that one. They keep changing stuff and using the same name.
@@RJTheBikeGuy the new lockouts are pretty easy but that one seems to be a mystery
Excellent
Why was the fork sent for service? Any stucked stanchion? Delayed Rebounds ? Or just scheduled service?
Just regular service. I bought the bike used and have no idea how many miles/hours are on it.
Nice video. That looked easy.
Do you have a Sr suntour xct 30 video
On my fork the lockout side is not coming out and it is stuck in their do you know how to take the whole this out?
ruclips.net/video/BUgt96qfV68/видео.html
Nice, I always wondered about the guts on these types of forks. This is unrelated to the forks but I wanted to ask you. Have you ever installed any of those bmx type of foot pegs on the back of a mountain bike? I was wondering if I could use something like that to carry someone else since they don't have a bike. I'm not sure what you need on something like that though or what they actually include on those pegs or whatever they call them.
No I haven't. I don't trust those pegs. Seems like they would bend the axles.
@@RJTheBikeGuy Good point. I guess you would still need to use a solid axle to make sure which is more than I want to do. Here's a video showing another way to do it, at least on one side which I thought was interesting. ruclips.net/video/m6Mu1LCvL48/видео.html
So its just grease inside there. Fore some reason I thought it was filled with fork oil.
Some forks are. Not this one.
Спасибо большое! Очень помогло :)
Thanks very helpfull information.
how often do you need to do this? :D
Wow, is there no damper at all in that fork?
Elastomer in spring. Slight damping.
Nicely done rj ☺ btw what model raleigh mtb is that?,it looks fairly new/in great condition too 👍👍👍👍
Raleigh Mojave 4.0.
Hi, had you ever fixed the cartridge leaking oil in XCR fork? The cartridge seems not to be made to be taken apart and unable to lock when the oil is out.
I haven't worked on one of those yet.
Hey legend why my suspension fork don't have a nut under the lower
Because you have a different fork.
@@RJTheBikeGuy so can you help me how to service HAHAHA
No fork oil?
How do you get the lower cap bolts off if it keeps spinning? I tried your impact trick but no luck. I tried compressing it but not sure if that helps enough.
Did you watch this video?
Rj- whats the closest vid for repairing Suntour M3030 spring shocks? Thx
Not sure. I haven't taken one of those apart.