KS Lev seatpost purchased in Sept 2013. Fitted in Oct 2013. Since then it's probably done around a dozen rides. Three faults - presumably related. All seem to be getting worse. Intermittent problems becoming more frequent.
1) Intermittent fault:- Seatpost jams in fully extended position. Eventually it will suddenly start working again. No idea why...change in temperature?... vibration whilst riding?? can't really work it out. This has been getting progressively worse/more frequent. I usually try to make sure not to leave it fully extended overnight or for any length of time.
2) Intermittent fault:- Whilst lowering seatpost, it often just stops part way down. But not always at same point. Sometimes stops after it's dropped an inch, sometimes 2 inches. You can get around this (usually) by lowering it very very slowly. It seems to help if you move your weight around the saddle a bit whilst you’re doing this. Again, this has been getting progressively worse. Increasing tension on remote cable makes no difference.
3) Seatpost has suddenly become very sluggish on return . I have increased pressure from 150psi......tried 190, 2000 and 220psi in it – no difference (The above video shows 180psi). NB - This only started a couple of days ago. Prior to that, it was a bit slower than I would have liked but nothing like this. Have checked that the post is holding pressure - It's fine.
Have 3 KS seatposts. Two KS i7s which have worked flawlessly for years and this KS Lev which has unfortunately been pretty disappointing. Sent back under warranty. Will post an update when I get a response.