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KS Adjustable Seatpost Maintenance

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#162 ·
I also posted in the LEV thread before seeing this post...

Don't want to steal this thread but... I've been trying to get a part: the DU bushing for a 31.6 supernatural and the local distributors don't have it. I'm in Canada if that counts. I damaged the bushing after it fell off my workbench and spent some time on the floor... the thin bushing with the teflon is scrap now... If anyone has a spare or knows where there is one (for real!), please let me know.

Also, I just bought a new 27.2 supernatural for my other bike and the remote is a lot harder to push/activate than my 31.6. There is nothing wrong with the cable and housing front to back, I checked and double-checked. I don't know if there is a solution to this issue.

Thanks,

Johnnydrz
 
#163 ·
jdcatnau said:
Mine has started to do this as well. Has anyone fixed this issue on its own or is it something you have to send in for service?
Click to expand...
For what it's worth, I rode my bike yesterday and half way through my 12 mile ride the play went away. I checked this morning and still no play. Maybe it has to do with the way I was storing it (hanging on my garage wall by the front wheel with the seat post compressed)? Last night I left the post it the extended position leaning against the wall.
 
#166 ·
Air valve

deanos said:
When rebuilding these things in my opinion by far the most difficult part is getting the air back into them. Last night I had an epiphany (not an ellsworth). This is probably dangerous, you have no idea what pressure you put in but my is it easy to pressurise the post. With the bent needle, some heat shrink and being able to hold the needle in the hole easily (no flexy hose) I was able to pressurise the post first go. It had too much pressure, was difficult to compress and returned like a rocket so I bled a little gas out by turning out the silver cap you put the gas in through. It's working fantastically now, probably still a little firm to push down but return speed is great and the top out thud very reassuring. It's a CO2 can that you pump up tires with.
View attachment 798798
Click to expand...
can you please tell we're you bought that valve?thanks a,lot!
 
#167 ·
Hello, my dropzone has become very stiff 1,5 cm from the top position and stops there.
I tried to increase the air pressure but I had no luck because the air stucks into the pump and does't pass through the small pinhole. After some posts of a forum-member I noticed that the seatpost works fine when the top red cup is completely unscrewed. But when I screwed it even one turn, the problem rises again!!
What should I do?
Do you believe that the trick with the two holes under the bottom red cup is the solution?
Why is happening now and not when I bought it?
Ιs there a possibility to create a bigger problem if I drill the two holes?
 
#168 ·
Anyone used a spring under the seat lever to help return it to locked position?, mine keeps sticking. New cable and used a mud lover cable outer to try to prolong it life.
 
#169 ·
I have the same problem, any response yet?
It seems as though the Dropzone pressure is not able to be pumped up, although it has the same little hole referred to in other models.

Please someone correct me if I am wrong? I would desperately like to add some more pressure.
 
#171 ·
#173 ·
Barkingmad said:
Thanks, I still want to know how that valve works?
I can't get air into mine
Click to expand...
Ι couldn't get air to my valve too, but the problem wasn't the air. The problem was the dirt and grease that covered the exhaust holes at the bottom of the dropper. The dropper needs hole for exhausting the air, look the video that I posted in that post, you'll see how the exhaust holes are working, try to your dropper if they are working.
 
#174 ·
I have the red plug out completely, as I serviced the outer tube with the 3 locating pins. Not a sign of dirt, and even with the bottom red plug out the inner main shaft extends slowly when the actuator is depressed. The dropper does not sag at all, but seems very sluggish on extending. The slightest amount of help extending it helps, but I'm positive it just requires more pressure.
I thought is was a rubber bung/valve like on a motorcycle gas shock where you could use a hypodermic needle to inflate it?
Guess I'll just keep trying to force air in...
 
#176 ·
KS DropZone not returning up - FIXED

Thanks Alexis for your input.
It turns out I was right with my post not returning back up. It was a matter of added some more pressure, and it's all hundred percent now.
I took some ideas of using a typical ball inflation valve and modified it to suit my requirement.
I made up a little press-fit aluminium end piece to insert in the small hole in order to add pressure. Inflation required was 230PSI in order to get the post to return at the rate I wanted.

Next step on my list is to make up my own lever system for my dropper :yesnod:
I have already 3D printed the lever, just the clamps to go!

 
#177 ·
Hi,

I have a problem with my i950. It seems like the valve which regulates the oil flow does not close itself. I can drop the post without actuating the lever. Can someone tell me how the valve is supposed to close itself?
Thanks in advance.
 
#178 · (Edited)
After having hard time trying to use a football needle adaptor to pressurize the KS seatpost chamber I have finally found an easy way to seal the needle-valble junction.

I have used heat srink tubbing, normally people use it to isolate wires connection, you could find it in any regular electronic components store or even in Amazon.

Image

https://i.imgur.com/YvwScO8.jpg

For those who are not used to work with this type of material; it's a kind of rubber rod which srink itself when external heat it is applied.

You should use a couple of small pieces of this rod of 3 or 4 milimeters of innee diameter. After put the first piece of the rod to the needle tip you have to use a lighter to heat it up just a couple of seconds in order to srink the rubber tube and adapt it to the needle shape, after that you should put a second piece of rod on top of the previous one to add another layer and heat it up again, doing it on this way you'll get the right size to fit in the valve hole.

Image
https://i.imgur.com/aclI2x3.jpg

Image

https://i.imgur.com/0n4HWWL.jpg

With this particular method I have reach 250psi pressure... and I can still going ahead but I preffer to stop. Now the seatpost works as a charm
 

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#179 ·
thanks for this post and the follow ups. I would have never figured out how to pressurize the air chamber with that hair sized hole in the indent there, and with the football pump adapter. Crazy setup.
Mine was full of foam, fresh oil and lube and it works great now! Thanks.
 
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