Fork Seal Replacement Part 1 (of 2) Dual Chamber Style Forks

[@rmatvmc]

Thanks Dirk. I am glad you found them helpful. I have more coming; slowly but surely.

[@dirkt40]

Your tutorials are fantastic! Absolutely pro - well done in terms of A/V quality, narration, and best of all - easy to understand. Having two boys (and me, dad) with dirt bikes I can't afford to run to the dealer for every little service requirement. So this is a superb resource. Keep up the good job! I am looking forward to seeing lot's more! Dirk (Cheltenham, ON, Canada)

[@rmatvmc]

Cartridge type. The RM 250 didn't get twin chamber showas until 2004. yes you can change the bushings when the forks are apart.

[@MarcusMotoDesign]

Thank you for a great pair of videos! They helped me very much when I lowered my CRF forks yesterday. Thanks a lot, Marcus (Stockholm, Sweden)

[@rmatvmc]

***** Thanks for watching! Glad we could help you out!

[@rmatvmc]

Refer to your owners manual for service schedule. Some guys just wait till they leak. I do a couple times a year. Regarding the bushings, inspect them when you have them apart. If the Teflon is wearing off, they need to be changed. We sell seals and bushings separate, but we also sell a pivot works kit with everything. Yes, they are machine specific.

[@rmatvmc]

@Yamahayz2502t - That is the air bleeder. it is an aftermarket accessory - there is just a screw there stock. They simply thread into the fork cap. If just the rep park came off, I would assume you need new ones. The red part shouldn't come off. We sell them on our site (not red though).

[@rmatvmc]

the cartridge fork video. The poor WR 250 never got the dual chamber fork. The WR450f finally got it in 2013. However, I too have a wr250f and the stock cartridge forks work great!

[@rmatvmc]

- yes. Your 05 YZ will look a little different though (process is basically the same). The 05 SSS fork was new that year and totally changed in 2006.

[@rmatvmc]

@2braappin - yes Basically the same. To change the oil, follow the steps in the video. If you are going to the trouble, put new seals in while you are at it; otherwise, you will find your seals leaking right after you went to all the work.

[@rmatvmc]

@SuperDuke1995 - If you just want to cahnge the seal, no. You don't need to take apart the inner chamber. Howerever; why not? It most likely could use some freshening up anyway.

[@rmatvmc]

@skiercaleb - No it is not. you need to watch the cartridge fork video we have. As a WR owner myself, I am disapointed yamaha hasn't put the new SSS (Dual chamber) fork on the WR yet. Even the 2011 WR's are still running the old fork. We are pretty much running 2004 YZ forks on the WR.

[@rmatvmc]

You are correct. Refer to our cartridge fork video.

[@rmatvmc]

@RepsolRC211V - every bike is a little different. i just did a 2006 YZ250f. The manual called for 335ml.

[@rmatvmc]

@royalb8man - yes! Time to tear them down, inspect, replace the seals, and put fresh oil in.

[@rmatvmc]

@hovchov123 - it is Necessary if the old ones are bad: however, it is always a good idea. Dust seals prevent dirt from getting to the seal thus prolonging seal life.

[@unknowntothem]

Best dual chamber video I have seen!! Great job guys

[@rmatvmc]

@661sand - The KYB SSS fork is a dual chamber type fork.

[@rmatvmc]

@darsktm - to remove the inner chamber, you need to pull the bolt from the bottom of the fork, thus dumping all the oil in the outer chamber. You will need to remove the fork to do it right.

[@rmatvmc]

no you shouldn't lose any from the inner chamber doing what you said. I will do the same thing sometimes.

[@mxracerguy]

great video! Best on KZbin. This helped a ton on my CRF fork seals.

[@rmatvmc]

@39kawasaki - check out the cartridge type fork video we have. It is more like your kx100 fork.

[@rmatvmc]

Unfortunately we don't have a rear shock seal replacement video right now but it is on the list for one of the next videos we film.

[@rmatvmc]

Thank you very much! Glad we could help

[@rmatvmc]

Yes

[@rmatvmc]

@661sand - SSS fork is a dual chamber type fork.

[@rmatvmc]

@ghat13 - not necesarry, but if I have the forks off the bike, I figure I may as well do it while I am there.

[@rmatvmc]

when you say "bleeder holes", I assume you mean the holes at the top of the inner chamber on the side of the cartridge. If so, that oil is actually outer chamber oil, it shouldn't be leaking from the inner chamber. however, it sounds like you have air in your inner chamber if it isn't rebounding all the way. I would put new oil in the inner chamber as well.

[@rmatvmc]

You can add it through the bleeder screw. You just have to determine how much.

[@rmatvmc]

@RepsolRC211V - it is actually a KX450f. Pretty much the same fork as your 06 YZ125 though.

[@rmatvmc]

@yamadogyz - On dual chamber'Twin chamber forks it is not usually needed.

[@rmatvmc]

Most people will run a 5w oil unless the forks are constantly being bottomed out then you may want to step up to a 7w or 10w. As for the oil specs they are 375ml for each leg. It's saying 193ml for the inner cartridge and then of course you would bleed any excess out and then the 375ml for the outer chamber.

[@rmatvmc]

@braaup - i don't see having time to do that any time soon. Your XR forks are actully a lot easier. Get a service manual and it will walk you through it.

[@rmatvmc]

No this was actually installed correct, there is a spring on each side of the seal

[@rmatvmc]

I doubt it is, but not sure on the bullet bikes.

[@1255cgraham]

Very helpful video series 👏. Thanks for putting these on!

[@rmatvmc]

Standard Oil Specs for your bike are 198mL (6.7 US oz.) for the inner chamber and then 335mL or (11.3 US oz.) for the outer chamber.

[@rmatvmc]

@ridemotorcyclesin200 - both forks are the same with the exception of your 2011 KX. Kawasaki did each side different for the first time. I can't say I have done those forks yet, so I couldn't tell you the specifics.

[@rmatvmc]

I would recommend you invest in a service manual but the specs for that bike are using Pro Honda HP Fork Oil 5W or an equivalent oil and 6.3oz for the inner cartridge and 13.75oz in the outer cartridge for standard settings

[@rmatvmc]

It depends on how often it is ridden and if the seals are leaking. Refer to your manual.

[@rmatvmc]

Dual chamber

[@rmatvmc]

@GrecoTheGodFather - Once they go they are pretty much done. Time to rebuild!

[@rmatvmc]

Watch our cartridge fork seal video.

[@skiercaleb]

is this the right video for a 07 wr450? Thanks for doing these great videos, really helpful.

[@rmatvmc]

Yes sir!

[@d1977j]

@RockyMountainATVMC It's the cone fork, I believe. Managed to stump upon some manuals, being similar to KTM SXS fork, except having preload adjuster also.

[@rmatvmc]

close - 08 KX450F.

[@rmatvmc]

- cartridge type. Yamaha didn't have a dual chamber until 2005.

[@rmatvmc]

@MrChicken49 - certainly not dual chamber. Refer to the cartridge fork video. I suspect the DT for is much more simple though.

[@rmatvmc]

@d1977j - The new KTM's have them, but I haven't got around to doing a video yet.

[@rmatvmc]

Yes it does have dual chambers. All CRF450 and CRF250s have dual (Twin) chamber forks. So does the CR250 97-2007. The 125 never got them. YZs started running them in 2005. The RM125 got them in 2001 and the RM250 got them in 2004. All RMZ450s have them. KX 4-strokes got them in 2006. My CRF manual calls for 5 weight fork oil.

[@rmatvmc]

If you want to make the job 10 times harder than it needs to be, then I guess it is possible. I couldn't understand why you would want to do that though.

[@Boiydy]

basically the same question as surlybonds. I completed part one of the video tutorial.all was well then realised that I had totally forgotten about the inner fork cap tool so was considering just replacing outer oil and putting back together. however the rod is not offering any resistance and settles itself all the way compressed. does this mean somewhere along the line i managed to get air in the inner chamber? a fair bit did come out the bleeder holes. anyhow great vids keep em up

[@Go69]

I hope the oil seals you are installing are manufactured differently than the factory seals as I think you put the seal in upside down. In the video it looks like you put the garter spring side towards the dust seal. If I'm not mistaken, the garter spring on OEM seals actually goes towards the oil side.

[@rmatvmc]

it depends on the fork. I would fix them.

[@atomicpunk2002]

Great help! Thanks. I thought 5 would be too light? I should really read my manual haha

[@rmatvmc]

it has Dual (twin) chamber.

[@rmatvmc]

No, You will need to refer to the Cartridge Type Fork Seal Replacement Video for your bike

[@wz1musik]

fantastic video, can this be done with the forks still in the bike yokes? my mate says you can?

[@surlybonds71]

In reference to the above post by atomicpunk2002, if you do open only the outer cap, invert the forks, and drain all of the fluid from the outer chamber-will you lose any of the oil from the inner cartridge? That's precisely what I did, I just wanted to change out the outer oil and start with a known quantity for suspension tuning purposes. Now I am afraid I may have lost oil from the inner cartridges. Should I go back in and do the entire procedure? Thanks by the way, your videos are the best!

[@darsktm]

Great vid, If I was to replace the inner assembly, could it be done by opening the inner cap while the fork was still in the triple clamps & replacing, would it need to be bled for any reason??

[@helzer70]

i have a 03 kx 250, is it a the same or a twin chamber as showed in the video? thanks for the video

[@billyman1221]

hey what type of grease i have lithium kind does that work? i just order all there parts of you guys

[@rmatvmc]

@cat1231234 - no, but while you are there......

[@rmatvmc]

twin

[@royalb8man]

so once they go do i need to buy new fork seals or add the oil?

[@andymixmasterg]

is this the right video for 2007 suzuki RM 125 showa's?

[@rmatvmc]

be careful putting the seal on the inner tube. If you don't use a seal bullet you can cut the seal.

[@hovchov123]

Is it necessary to replace the dust seals(wipers) when replacing the oil seals?

[@rmatvmc]

@billyman1221 - that will work. Thanks!

[@d1977j]

Hi, did you ever do a WP dual chamber? I got a set that fits yamaha WR 250/450 F from '06 to '09, probably up to '11. They are sort of racing suspension, not standard, but I have no data for it..like oil quantity, type, which seals etc.

[@APmoto920]

Do you guys have a video that will work for 48mm kybs off my 21 kx250? Mostly looking for the correct tool sizes to grab

[@SuperDuke1995]

Do i have to disassemble the whole fork just to change the seals on my 04 Crf450r?

[@rmatvmc]

Most riders can get away using the 5W oil in the forks and most times they will step up to a higher weight if they are constantly bottoming out the suspension... a lot of the smaller bikes will use a higher weight but most times the bigger bikes stick with the 5w. You would be fine with both but i would stick to what the service manual says unless you had a reason to step up

[@atomicpunk2002]

Another quick question, If I want to just change the oil in my forks, can I just undo the top cap on them, and pour the oil out? Will all the oil come out? and then I just top it back up and bolt it all together?\

[@elliotmotoX]

Awesome help!

[@rmatvmc]

- they are similar. Just refer to your manual.

[@2fingerproductions]

Is this the right video for a 2005 KTM 125 sx? or the cartridge type?

[@ridemotorcyclesin200]

That was just one fork correct? Isn't the other fork totally different? I have the SFF on my 2011 KX250f this is the same correct? Then what about the other fork leg? thanks

[@GrecoTheGodFather]

hey, i just got a used crf450r 2006 i noticed one of the forks are leaking quite a bit of oil is their a faster and easy way too stop the leak??

[@dcsktr52]

i have a 2002 crf450r im am not sure if it has dual chanber or cartridge forks?

[@faatbar50]

hi! I have a ktm with WP forks. WP is that a dual chamber fork? Or do ktm have their own system?

[@RepsolRC211V]

How much oil (mililiters) go in outer tube in that KYB 48mm?

[@BlueLightRhyno]

Great Video, thanks.......

[@jayersinn5748]

is this the right video for a2003 cr 250?

[@atomicpunk2002]

Also, what weight oil comes standard in a CRF450, 2006 model?

[@jeffwhitney3924]

question, im going to have my local shop do my seals but they said they recommend using 10w and my manual says to use 5w, wanted to know if you have an opinion on this it's a 08 crf 250r i weigh 150-160 lbs and am a mid pack c rider ( if that matters ) any ways would like to get a second opinion and i watch a lot of your videos, i think you guys to a great job. i wanted to do them myself but chickend out and sent it to the shop

[@seanobrien1902]

Thanks!

[@2braappin]

i have a 07 yz250f so i think there basically the same forks, what would i do if i just want to change my fork oil?

[@RiggadonDan]

What if you can't get the bottom nut off? I backed out compression all the way but it just spins.

[@BlackDirt_Enduro]

Do you by any chance know what type of forks an 01' yzf426 has? I downloaded a manual and it seems like a single chamber.

[@MrJangojet]

Figured it out

[@661sand]

iam connfused? in the cartridge video comment u say that the 05 has a twin chamber. do u mean they put the sss forks in at 2005 or is the twin chamber a seperate change that they made in 05 currently i have a yz 125 and i dontvknow if i have a cartridge fork or a twin wall fork possibly if its what they

[@rmatvmc]

- it is a cartridge fork.

[@MMin3r]

Can you guys do a sport atv steering stem bearing replacement video? I'm trying to do one on a 2006 yfz450

[@rmatvmc]

MMin3r I would first recommend referring to the service manual for that machine and following along with that for the rebuild. You can always call in and talk to one of our service technicians with any questions and they'd be happy to walk you through any issues that you run into. I'll add the ATV Steering Stem Replacement to the video list and we'll see what we can do

[@rmatvmc]

It looks like your bike takes 373cc (12.6 oz.) which is standard for each fork.

[@RepsolRC211V]

is that work on 2006 YZ 125 with KYB SSS 48mm forks?

[@Braaapproductions736]

What if I accidently Installed the fork seal washer backwards. with its projections facing down?

[@661sand]

made in 05 if iam right or do the 05s have the sss forks. an answervwould be much appreciated. iam looking to redo my forks myself but i dont want too ruin them fausevi have the. wrong idea. thx plz answer asap.

[@rmatvmc]

no it isn't. they have the same fork. Valving and spring rate may be different, but it is the same fork. The WR250f has a different fork though (it is basically an 04 YZ fork).

[@atomicpunk2002]

Does a 2006 CRF 450 have Dual Chamber forks?