If you've been running your forks for a while and looking after them, you should have done the basic lower leg service. Around every 50 hours of riding, this is just a simple clean and fluid change. Every 4th service should be a complete lower service including changing all the seals.
This bigger service is a little more involved than the simple service, however it's still pretty straightforward to do at home with only a few basic tools. This service doesn't cover the damper side only the air side as the Charger damper service requires specialist tools.
This guide is written from a pike fork and only covers the lower legs, the principles are the same across all Rockshox forks. It's worth carrying out this service as it really does make a noticable difference to the feel of your bike.
- Remove fork from frame and give a good clean.
- Depressurise the air side
- Remove the Rebound adjuster, the Pike use a 2mm hex key the Reba just pulls out
- With a 5mm hex key unscrew the lower bolts, not all the way leave a couple of threads in
- With a soft faced hammer gently tap the lower bolts until they are free
- Drain the fluid out of the lower legs
- Remove the uppers from the lowers
- Drain the final fluid out
- Clean the uppers to remove any fluid and dirt, using Isopropanol and a lint free cloth
- Remove the foam rings
- Remove the lower crush washers
- Clean the lowers with degreaser, and warm water, thoroughly rinse and dry
- Remove air side top cap
- Move the lip under the circlip (this is a pain to achieve) - under the circlip is a plastic washer with a tab which prevents the circlip from being 'opened' this tab needs to be moved so it is not between the open ends of the circlip.
- Remove circlip,
- Remove the air shaft
- Change o'rings
- Change seal head
- Lube seals
- Refit Air shaft
- Refit Circlip
- Move tab to circlip gap
- Refit top cap
- Refit Dust wipers
- Soak the new foam rings in suspension fluid
- Install the foam rings
- Install new crush washers
- Liberally coat the dust seals with SRAM butter
- Slide the uppers into the lowers
- Add in Rockshox fork oil
- Bolt in the lower bolts
- Replace the rebound adjuster
- Pressurize the forks to your pressure settings
- Refit to the frame
It is very beneficial to record your shock pressure and rebound settings prior to starting so that you can set up your shock to where it was before you started.