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I'm sure this has been done many times before. My new forks wont sit at 0% travel. They are new but bought second have on a 2019 clockwork evo s 29er. Used once on a gravel track before selling to me.
It occasionally sits at 0%. Sometimes 5% or 10%. It soesnt seem to return to a solid stop and the first 10% is light and it feels like the only resistant is friction.
I've tried the cable tie burp but no luck
Ive tried removing the valve and yanking it a few times. It made a flushing burp noise and sat at nearly 0. when I assembled the top and pumped it up it sat fine but after a few compressions it went back to the same issue.
I've tried deflating with the bike upside down. Opening the two bolts as if I were doing an oil change to equalize the air. Tighten back up and pump back up. Initially perfect. Few laps of my drive and it's the same again!
Any help would be great.
It it’s got the debonair spring in It then I doubt it would ever return to fully extended - because the negative spring is pushing it into the first bit of its travel. If you’ve got it set to 25-30% sag and it’s all working I wouldn’t worry about it.
Mate of mine just had a similar or same problem to this on his new Whyte with 2018 Rev's. Fork was sagging at around 10% without him not on the bike. He sent them back to SRAM via the shop he bought the bike from and they reported back they were fixing under warranty. He went to pick up the forks once SRAM were finished and they had provided him with a replacement set...brand new 2020 Pikes!
So send them off to SRAM and see what happens. Apologies in advance if you get my mates fixed forks in return!
Interesting. The forks on my wife's clockwork do the same thing. I assumed it was just the debonair negative chamber being really supple.
What was done to the forks that were fixed?
I find it hard to believe that it needs to be sent back. Not sure how warrenty will work when I bought them second hand either.
Had similar issue with pikes a few years back. Loco tubing sorted warrenty on a different issue a year later. He had to do a lower service when sorting it and when I got them back I had full travel always. To me that suggests that it's a grease,oil level or a trick or two needed when resembling.
Do you need to fully compress before tightening the lower bolts. I didn't but saw it in a mbuk video.
They probably just need a lowers and air spring service. The top part of the travel is very light due the large negative spring. It only takes a small amount of friction to stop them extending fully.
Not happy to service them after four shorts rides.
To be fair, a service when new is probably the best thing you could do for them as they are notorious for leaving the factory with minimal amounts of grease / oil in them.
Have you seen how SRAM recommend setting sag (see 0:50 - 1:10)
Not happy to service them after four shorts rides.
As Qwerty rightly says, RS don't have the best reputation when it comes to lubrication from factory, yet you're happy to run them potentially dry into new winter season?
Weird logic.
I can only assume nee forks are set correctly. Dont understand how the amount of oil will effect this. It's just lubricating the moving parts. Blocked grease transfer port maybe the case.
What pressure are you running in the forks? My wife's fork sucks down at 60 psi but is okay at 70 psi.
It makes sense though. The transfer port is about ten or fifteen per cent into the travel I believe. So, at lower pressures, the force on one side of the piston then balances out with the force on the negative piston face. Keep in mind, there's a bit of friction you'll never get rid of and the negative piston face has a slightly lower area which means it finds equilibrium at a slightly higher pressure. If this happens around the transfer port, you suffer a lot if suck down.