I noticed SKF makes 35mm inside diameter seals for KTM 65 motocross bikes. Anybody know the outside diameter and depth of these, and will they fit a 35mm stanchion Boxxer? What are the stock seal dimensions of a Boxxer?
You're right, typed that in wrong.I always though the 35mm boxxers oil seals were 35/45/7...
still, a fox air fork also has a sealed upper stanchion/air chamber and they have no problem using foam rings and a single dust wiper/seal.descente -
As baca pointed out the difference is that the air sprung stanchion is sealed off at the base (or close to the base) thus the volume in the lowers at bottom out and thus internal pressure is quite high. Compare this to the coil boxxer which is open to air at the base of the stanchion, thus has a greater volume and lower pressure in that leg.
Also just a disclaimer / tip if anyone decides to give that a go - when it comes to RS forks, in my experience dust wipers are generally reusable, however pressure seals are not. If you remove the stanchion from the seal and then reinstall it without using a new seal, there will be a tendency for it to leak. Occasionally it might work fine, but often it will not.
Thus, if giving this a go, I'd suggest (at least) using a new set of pressure seals - 35x45x7 or 32x42x7mm 'rotary shaft seal' at your local seal shop.
FWIW - I've only tried removing the lower lip of the dust wiper personally, and it worked great with no ill-effects that I could notice. Theoretically, removing the upper lip of the pressure seal should also be fine but I haven't tried it, if someone does, feel free to post how it went. Keep in mind if doing this, it should be done on a new pressure seal prior to installation.
hey guy,So I got some of the new Fox SKF seals (32MM) that came in. I put them in a 2008 boxxer team. they do in fact work but I can't give any opinion of them since all I did was ride around on the road so far. There seems to be a slight noticeable reduction in stiction but expect them to break in a little bit with some actual riding.
Sounds promising.. I'm wonder if you run the fox foam rings with the green fluid in the bottom would work..I am running an Elka cartridge in my 35mm Boxxer world cup. Everything still felt a little sticky running both oil and dust seals so I decided to try running just dust seals with slick honey as lubrication in lowers and bushings. I installed the dust seals with alcohol which evaporates of course and I compressed the fork almost all of the way before tightening the lower bolts effectively reducing the volume of air inside the fork below the seal head(damper side has no seal head with elka cartridge). The initial stickiness is almost gone however the big difference is how it feels going over fast braking bumps and rocks. There is almost no stickiness at all.
I took three runs down the local dh trail and had no issues with the dust seals blowing out. The concern of course is how well the slick honey will do with temperature and with long term lubrication as an oil substitute. I am sure that I will need to pull the lowers after a hard day of riding which isn't a big deal I can just do it after work(bike mechanic). I will probably go back to dust and oil seals I was just curious if this setup would work.
Swapped them out on my pike w/arygle lowers, def. noticeable difference, smooth/plusher..Anyone run the 32mm on a RS fork other than the Boxxer? Thinking about these for the Revelation on my XC bike.
Are you running the RS oil seals with the fox dust seals or did you take all the RS parts out and just use all the fox parts?Swapped them out on my pike w/arygle lowers, def. noticeable difference, smooth/plusher..