[Stevebiker]

I wanted to increase the travel of my Pike from 130mm to 140. Had the lbs switch out the air shafts. Sure seems like it's closer to 160. Raised my BB 10mm as well which is more then I would expect. At any rate, I don't like the handling now. Can someone compare the pix to their fork and give me an opinion on its travel?

Thanks
Steve

 

[294037]

It should measure 140 on the stanchion, is it a 29" fork? Maybe they fitted an A2 fork 29 140 shaft when you need a B1 140mm shaft

 

[Dougal]

Yep, they've fitted the wrong shaft.

 

[Stevebiker]

Thanks for the confirmation. It's a 29er.

The receipt says:
RockShox Debonair Air Spring upgrade kit: Fits Pike (A1-A2/2014-2017) 140mm-29",160mm-27.5"

The fork is right except it is on a 2019....

The good thing is now I know I don't want anything that long. Surely don't like the way it handles on tech sections and climbs.

 

[294037]

Yeah thats the wrong part as you have a B1 fork, you need DebonAir Upgrade Kit 140mm PIKE B1+/Revelation A1+ (2018+)

RS part# 00.4019.931.002

The 18/19 pikes all use the same length internals regardless of wheelsize, whereas the A2 forks were longer in the 29" versions so needed a longer shaft (or damper) for the same travel

 

[Stevebiker]

Thanks!
I'm guessing that it is best to swap it back to the original while waiting for the correct one as it probably isn't designed to run with this shaft at 160mm.

 

[Stevebiker]

Well, I'm back.

Fork still isn't right. When my LBS put the new correct shaft in (measured 10 mm longer then the original), the travel still measured 160. He said that he had to cycle the shock at a lower pressure to get the travel to set right. Didn't sound right but took it of ride anyway. felt a little off.

Back home, it measured 155mm and pressure was at 35psi. Dropped pressure and cycled it to no avail. Also, checked sag at 60 and there was none. Ended up at 20! After a mostly xc ride, only used 60mm of travel. I was running 65 psi when it was 130mm.

The pix shows 155mm travel and not much sag considering it's at 20 psi.

Not sure what is going on. Seems like there is an assembly issue this time? Something broke?

 

[294037]

Something is damaged and leaking air in to the lowers, I bet if you let all the air out it will still feel pressurised

 

[mfa81]

just as a reference, a friend got a brand new 150mm pike down to 140mm, it's exactly 140m

 

[Stevebiker]

just as a reference, a friend got a brand new 150mm pike down to 140mm, it's exactly 140m

Ya, pretty interesting that the shaft measures 10 mm longer then the 130 and yet comes out at 155-160 mm. Also, letting the air out, it still has a fair amount of pressure. The LBS says it is a pretty simple system and can't see what would be causing both the pressure issue and increased travel. He hasn't taken it apart yet though.

Any ideas or suggestions? I'm thinking something changed, broke, or moved when assembling?

 

[Dougal]

Did they take out the top-out bumper?

 

[UEDan]

Take it somewhere else.. but at this point they really shouldn't be charging you anymore to fix their mistake.

 

[dreys]

Find a different shop.

If guys at the shop can't QA their work, I wouldn't trust them with anything. How can they hand you the bike saying your fork is at 140mm, and you measure it at 160mm? Run as far away from them as you can before they'll do any more damage.

 

[Stevebiker]

I get what your guys are saying about finding another shop. I'm not ready to do that yet. I've been dealing with them for the better part of 20 years and they have always treated me very well even though I can be a pita. They are owning this one so far and want to make it good.

Anyway, I'd still like some insight on this if anybody has any.

Thanks
Steve

 

[syl3]

As Dougal suspects, they probably switched out the piston without installing the topout bumper from the old one.

the new piston comes in box looking like this:

https://static.bike-components.de/c...Revelation-2018-Model-62281-0-1519910447.jpeg

the old one will look like this (notice topout bumper right under the piston head)

https://static.bike-components.de/c...Shaft-Pike-Lyrik-Yari-51680-0-1481262168.jpeg

 

[jbadger1977]

I get what your guys are saying about finding another shop. I'm not ready to do that yet. I've been dealing with them for the better part of 20 years and they have always treated me very well even though I can be a pita. They are owning this one so far and want to make it good.

Anyway, I'd still like some insight on this if anybody has any.

Thanks
Steve

Shops have changed a lot in 20 years. Some shops have suspension specialists who do nothing but service suspension and who have likely either had some factory training or have been trained elsewhere (i.e., PUSH, Dirtlabs, etc, etc). It sounds like your go-to shop has fallen by the wayside when it comes to suspension work. As other have said, I would not have them do anything else to your stuff. I would request a refund and take it to another shop who knows what they are doing.

 

[Stevebiker]

He did make a mistake and ordered the wrong shaft originally, but for the rest, we are speculating and I will give him the benefit of the doubt unless proven different as I would like others to do for me. He's worked on plenty of forks and has successfully swapped air shafts before.

Anyway, I appreciate the suggestions and thoughts on what is going on and want to stay focus on the fork itself.

Here is the original and the 10mm longer one. He's been in contact with Sram. Verified it was the correct part for that fork. They are not sure what is going on either, but have had a rare issue with the port to the Neg air side? They sent a new assembly second day air that will be here today.
Before he called them, he took it apart and checked it over and reassembled. It appeared good, but got worse after a little bit. When he put the original back in, it was fine.

 

[Rmplstlskn]

As Dougal suspects, they probably switched out the piston without installing the topout bumper from the old one.

the new piston comes in box looking like this:

https://static.bike-components.de/c...Revelation-2018-Model-62281-0-1519910447.jpeg

the old one will look like this (notice topout bumper right under the piston head)

https://static.bike-components.de/c...Shaft-Pike-Lyrik-Yari-51680-0-1481262168.jpeg

The above are SOLO air springs. OP has a DEBONAIR fork system. Those will only set him back in technology to the old Pike fork springs.

Rmpl

 

[Dougal]

The above are SOLO air springs. OP has a DEBONAIR fork system. Those will only set him back in technology to the old Pike fork springs.

Rmpl

Debonair is solo-air. The only fundamental differences are a lower friction seal-head and a hollow shaft.

 

[Stevebiker]

He did make a mistake and ordered the wrong shaft originally, but for the rest, we are speculating and I will give him the benefit of the doubt unless proven different as I would like others to do for me. He's worked on plenty of forks and has successfully swapped air shafts before.

Anyway, I appreciate the suggestions and thoughts on what is going on and want to stay focus on the fork itself.

Here is the original and the 10mm longer one. He's been in contact with Sram. Verified it was the correct part for that fork. They are not sure what is going on either, but have had a rare issue with the port to the Neg air side? They sent a new assembly second day air that will be here today.
Before he called them, he took it apart and checked it over and reassembled. It appeared good, but got worse after a little bit. When he put the original back in, it was fine.

View attachment 1265179

Sram had sent a new shaft.
The LBS didn't notice anything that stood out except the new one fit a little tighter. It's working fine now and is at 140mm so life is good. Thanks for the help everyone.