This document is intended to help you through the revalve process

This document is intended to help you through the revalve process of a Fox 2.5
shock. This was not sponsored or authorized by Fox. This is not intended to be a guide on
valving recommendation or a set up guide for your particular car. This is a basic
overview of the process. We just hope to take some of the mystery out of shock valving
and give you a few reference points so you can take on this process. Our hope was to help
out the average person interested in improving their ride. If you don’t know what your car
needs (more or less rebound/ compression) then you might not want to attempt this. If
you are going to attempt this, make small changes and then test. Don’t make a huge
change and then go out and hit the whoops at 80mph. We used a Fox 2.5 7/8 shaft 16”
remote reservoir coil over for this tutorial. Good luck and enjoy. Fox has designed a very
user friendly rebuildable shock.
Good luck,
Jon
Step #1 – Remove nitrogen pressure.
Step #2 – Measure and note your preload for later installation.
Step #3 – Zip tie spacers to avoid loosing them.
Step #4 – Coil removal
Step #5 – End cap removal
Step #6 – Inner clip removal
Push in the center piece to expose the ring better.
I bent up some pliers to help with this clip.
Step #7 – Shaft assembly removal
Once shaft assembly is removed, keep shock tube upright (so you don’t spill oil). The
valving process is different from the oil change process, so don’t spill your oil. Most
importantly you don’t want to get air in the system (so don’t tip over the shock). I
usually tape it to a table leg while I work on the piston assembly.
Step #8 – Shaft disassembly
Step #9 – Valving
Identification – your factory set up will be engraved on the shock eye. Refer to Fox’s web
site http://www.foxracingshox.com/fox_tech_center/index.htm#offroad. This will be your
compression and rebound set up.
Rebound
Compression
Step #10 – Valving layout
This is the rebound stack laid out. In this change I added rebound by changing the 1.600,
1.425, 1.350, and 1.10 from .012 to .015. This was a fairly moderate change for rebound.
Step #11 - Reassembly
Step #12 – Torque nut to 30 ft/lbs
Step #13 Install shaft and piston assembly.
Top off oil in shock tube. Oil should drain from slot when pushing in piston assembly (do
this slowly). If oil does not spit out through the slot, you still have air in the system.
Step #14 – Shaft and clip install
Depress the assembly enough to install the retainer clip. Then pull back on it to expose
the threads for the blue end cap.
Step #15 – Cap install
Step #16 – Coil install
Now extend and compress shock. The shaft should slide smoothly all the way out. If it
jumps on full extension you probably have air in the system. If not then you are good.
Install shock and charge with nitrogen to 200psi.
You’re done…….go test it.