How to Rebuild Your Float SL Factory Rear Shock at Home

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Rebuilding your Fox Float SL Factory rear shock at home can be a rewarding process, ensuring that your suspension performs optimally. Fox’s Float SL Factory rear shock is renowned for its lightweight design and performance capabilities. However, with regular use, it can begin to wear and may require servicing. This guide will walk you through the process of rebuilding your Float SL Factory rear shock, from installation and maintenance to troubleshooting common issues.

Tools Required

To rebuild your Fox Float SL Factory rear shock, you will need the following tools:

  • 3mm, 5mm, and 8mm Allen wrenches [paid link]
  • T20, T25, and T30 Torx drivers
  • Socket wrench set
  • Shock pump
  • Soft mallet or plastic hammer
  • Small needle-nose pliers
  • Fox suspension fluid (or equivalent)
  • Clean rags
  • Isopropyl alcohol
  • Latex gloves
  • Seal kit (specific to Fox Float SL Factory model)
  • Shock fluid bath for cleaning (optional)

Preparation for the Rebuild

Before starting the rebuild process, ensure that you are working in a clean environment with adequate lighting. Lay out all your tools and components neatly to avoid misplacing parts during the rebuild. You will also want to check the condition of your shock’s internal components, including the seals, o-rings, and damper, as these may need replacement if they show signs of wear.

Remove the Rear Shock from the Bike

  1. Release the air pressure: Use a shock pump to remove the air from the rear shock. This is a critical step to ensure safety during disassembly.
  2. Detach the shock from the frame: Use your 5mm and 8mm Allen wrenches [paid link] to remove the bolts securing the shock to the frame. Be careful not to damage any components while loosening the bolts.
  3. Carefully remove the shock: Once the bolts are removed, gently slide the shock out of its mounts.

Disassembling the Float SL Factory Rear Shock

Remove the Shock Eyelets

  1. Loosen the eyelet bolts: Using a 5mm Allen wrench [paid link], unscrew the bolts securing the eyelets to the shock body.
  2. Extract the eyelets: Once the bolts are removed, carefully slide the eyelets off the shock shaft. Take note of their orientation for reassembly.

Disassemble the Shock Body

  1. Remove the air canister: The Float SL Factory shock features an air canister that holds the positive and negative air chambers. Use a T20 Torx driver to remove the screws securing the air canister to the shock body.
  2. Carefully separate the air canister: Once the screws are removed, gently twist and pull the air canister off the shock body. Be cautious to avoid damaging the internal seals.

Clean and Inspect Internal Components

  1. Clean the shock parts: Wipe down all components with a clean rag to remove any dirt or debris. Use isopropyl alcohol to clean the shock body and internal components.
  2. Inspect seals and o-rings: Examine the internal seals for signs of wear or damage. Replace any worn-out seals or o-rings with a new seal kit.
  3. Check the damper assembly: Inspect the damper for signs of wear or leakage. If the damper is damaged, it will need to be replaced.

Rebuilding the Float SL Factory Rear Shock

Install New Seals and O-Rings

  1. Apply shock fluid: Lightly lubricate the new seals and o-rings with Fox suspension fluid before installation. This will ensure smooth operation and longevity.
  2. Install the seals: Carefully slide the new seals into their respective slots on the shock body and air canister. Be sure to follow the manufacturer’s instructions for proper seal orientation.

Reassemble the Shock Body

  1. Reattach the air canister: Once the seals are in place, carefully align the air canister with the shock body. Press the air canister back onto the shock body and secure it with the T20 Torx screws.
  2. Install the eyelets: Slide the eyelets back onto the shock shaft, ensuring they are aligned with the shock body. Tighten the eyelet bolts with a 5mm Allen wrench [paid link].

Refill the Shock with Air

  1. Preload the shock: Use a shock pump to slowly begin refilling the shock with air. Make sure to follow the manufacturer’s recommended pressure for your weight and riding style.
  2. Check for air leaks: After pumping air into the shock, inspect all seals and connections for any signs of leakage. If you notice air escaping, double-check the seal installation and re-tighten all bolts.

Troubleshooting Common Setup Issues

Air Leaks

If your rear shock is losing air after a rebuild, it may indicate a problem with the seals or the installation of the air canister. Double-check the position of the seals and ensure that all connections are tightened properly. If the issue persists, inspect the damper assembly for any damage.

Inconsistent Performance

Inconsistent performance or a lack of responsiveness can often be traced back to improper air pressure or issues with the damper. Ensure that the shock is properly pressurized according to the manufacturer’s guidelines and that the damper assembly is functioning as intended. If necessary, replace any worn-out damper components.

Noisy Shock

If your rear shock is making excessive noise during use, it may be a result of insufficient lubrication or worn-out seals. Check the shock for signs of wear, and ensure that all moving parts are adequately lubricated with suspension fluid.

Customization and Optimization for Better Performance

Adjusting Rebound and Compression Settings

  1. Rebound damping: Adjusting the rebound controls how quickly the shock returns after compression. If the shock is bouncing back too quickly, reduce the rebound damping. If it feels too slow, increase the rebound damping.
  2. Compression damping: Compression damping affects how the shock responds to impacts. Adjust the compression to suit your riding style, whether you prefer a softer feel for technical trails or a firmer setup for fast descents.

Fine-tuning Air Pressure

Adjust the air pressure based on your weight, riding style, and the terrain you’ll be riding on. Experiment with different air pressures to find the balance between comfort and performance. Always check the air pressure regularly to ensure optimal shock performance.

Comparison with Similar Models

The Fox Float SL Factory rear shock is designed to offer an excellent balance between performance and weight, making it ideal for riders seeking efficiency on both climbs and descents. Compared to other Fox rear shocks, such as the Float X2, the Float SL Factory is lighter and less aggressive, focusing more on cross-country and trail applications. While the X2 offers more advanced features and a higher level of customization, the Float SL Factory provides an easier and lighter alternative for riders looking for less maintenance and a more streamlined setup.

Compatibility with Other Drivetrain Components

The Float SL Factory rear shock is compatible with a wide range of modern mountain bike setups. It works best with lightweight, cross-country-oriented drivetrains and is ideal for bikes with a focus on efficiency. However, ensure that your frame is designed to accommodate this shock’s specifications, including mounting hardware and travel length. Check your bike’s geometry and ensure that the shock’s dimensions align with your frame’s shock mount points.

By following this guide, you can confidently rebuild your Fox Float SL Factory rear shock at home. Regular maintenance and proper tuning will keep your suspension performing at its best, whether you’re on a rugged trail or riding your favorite cross-country route.