The RockShox Reverb height-adjustable seat post is a doddle to bleed. Here's how...
Tools for the job (Essential Kit):
1. Lint-free cloth or rags
2. Torque wrench
3. RockShox Suspension Oil in 2.5wt
4. T25 Torx Key
5. T10 Torx Key
6. Safety glasses
7. Rubber gloves
8. Reverb Bleed Kit
9. Oil pan or bucket
10. Isopropyl alcohol
11. Storage tray
1. Undo your seat clamp, raise the whole seat post up to the minimum insertion mark, then clamp it again. Place the bike into the stand and clamp at the lower section of the post without getting the hose caught. Adjust the bike in the stand so the remote lever sits higher than the saddle. If not using a stand, the remote lever still has to be higher than the tip of saddle.
2. Use the handlebar remote lever button to extend the seat post to its full height. Again, check that the saddle is still lower than the remote lever. Dial the remote lover's speed barrel adjuster anti-clockwise (the opposite direction to the arrow) so that the return speed is set at its slowest.
3. Use the T25 Torx bolt to loosen the remote lever clamp and reposition the remote so that the bleed port bolt (the small Torx bolt near the speed adjuster) is at its highest point on the remote lever, and then gently retighten the remote lever clamp bolt.
4. Drape a clean rag around the seat post, positioned as close to the top as possible. Place another rag around the remote lever, and put a bucket or oil pan directly underneath it on the floor to catch any stray drips. If you're especially clumsy, remove your front wheel and disc brake pads to completely rule out the chance of any oil contamination.
5. Screw the brass syringe fittings tightly to both syringes. Fill the first syringe three-quarters full with RockShox 2.5wt suspension oil. Turn the syringe so the brass fitting is facing upward and hold a rag over the end. Gently depress the plunger to remove any air from the syringe, catching any oil in the rag. This will be the remote lever syringe.
6. Using a T10 Torx key, gently turn the remote lever bleed port screw anti-clockwise to remove it and put it in the storage tray. Carefully thread the lever syringe (three-quarters full of oil) into the bleed port, turning it clockwise until it's tight. The syringe can now simply hang by its hose while you move to the post.
7. Fully depress the second syringe to empty all the air from it. Remove the bleed post screw on the seat post (located on the drive-side of the post up near the seat cradle) with a T10 Torx key, turning it anti-clockwise. Screw the empty, fully depressed syringe into the seat post bleed port.
8. Hold both syringes upright to prevent any air entering the system. Gently depress the plunger on the remote lever syringe to push oil through the system and remove any air bubbles. This is known as purging. While doing this, gently extend the seat post syringe's plunger. Keep depressing the remote lever syringe until there's only a small amount of oil left.
9. It is common to get a build-up of air in the seat post syringe. If the amount of air in the syringe restricts how much oil you can pull/push through, unscrew the syringe from the bleed port and hold it facing upwards. Wrap a rag around the end of it and gently depress the plunger, forcing the air out. Reattach the syringe to the seat post, turning it clockwise until tight.
10. Now push the oil back through the system by reversing the process. Gently depress the plunger on the seat post syringe while extending the plunger on the remote lever syringe. You should notice air bubbles forming in the syringes as you remove the air from the system.
11. Repeat this purging procedure, pushing oil with one syringe and pulling it through the system with the other, until no more bubbles appear at either syringe. The amount of times you need to do this can vary with each service, so just keep going until there is no air left in the system.
12. Double-check that the rag around the seat post is still in position. Depress the plunger of the seat post syringe until there's only a small amount of oil left. Remove the syringe from the seat post bleed port, turning it anti-clockwise, and replace the bleed port screw turning it clockwise until you reach 1.7Nm with the torque wrench. Clean any excess oil up.
13. Hold the remote lever syringe upright. Extend the plunger to remove any air while pushing the remote button in, and then depress the syringe plunger while allowing the remote button to pop back out. Repeat eighth times. Now depress the syringe again, rotate the remote lever's speed barrel adjuster from anti-clockwise and back again, four times.
14. Gently extend the syringe plunger to dislodge any air from the remote. Depress the syringe plunger while turning the speed adjuster anti-clockwise all the way to the full slow position. Keep pushing on the plunger to pressurize the system and gently push the remote button in, allowing the system pressure to push it back to the fully extended position.
15. Remove the syringe from the remote lever bleed port and use a T10 Torx key to screw the remote lever bleed port screw back in. Using a torque wrench, tighten it to 1.7Nm. Loosen the remote lever clamp bolt and rotate it until you reach the required position on the bar, then tighten the bolt to 5-6Nm. If you removed your wheels and brake pads, you could pop them back in.
16. Spray isopropyl alcohol over the remote lever assembly, hose and the top of the seat post. Give it a good wipe down. Drop the bike down from the stand undo the seat clamp and reposition the seat post to the desired height in the frame. Operate the post with the remote lever to check that it's all working properly before hitting the trails.