Step-by-Step: Rebuilding Your Recon RL SL Suspension Fork

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The RockShox Recon RL SL [paid link] suspension fork is a popular choice for cyclists looking for a lightweight and efficient solution for trail and cross-country riding. Over time, however, like any suspension fork, the Recon RL SL [paid link] may need maintenance or a full rebuild to ensure optimal performance. This guide will walk you through the process of rebuilding your Recon RL SL suspension fork, including detailed instructions for installation, adjustment, and maintenance.

Tools Required

  • 8mm and 5mm Allen wrenches [paid link]
  • T25 Torx wrench [paid link]
  • 10mm socket wrench
  • Suspension fluid (RockShox recommended)
  • Fork oil syringe
  • Soft cloth
  • Small flathead screwdriver
  • Compression unit tool (specific to Recon RL SL)
  • Grease (low-viscosity for suspension components)
  • Torque wrench [paid link]

Disassembly of the Recon RL SL Fork

Before starting the rebuild process, make sure you are working in a clean, well-lit environment with all necessary tools readily available. Disassemble the fork carefully to avoid damaging any components.

  1. Remove the front wheel:
    • Use a 5mm Allen wrench [paid link] to remove the quick-release skewer or thru-axle.
    • Set the wheel aside to clear space for the fork.
  2. Remove the brake caliper:
    • Use a T25 Torx wrench [paid link] to remove the brake caliper from the fork’s post mount.
    • Hang the caliper using a cable tie or support device to prevent strain on the brake line.
  3. Detach the fork from the headset:
    • Use a 5mm Allen wrench [paid link] to remove the stem bolts.
    • Loosen the top cap and headset preload bolts. Slide the fork out of the headset and set it aside.
  4. Disassemble the damper and air spring:
    • Remove the top cap using a 5mm Allen wrench. This will expose the air spring assembly.
    • Use the appropriate compression unit tool to carefully remove the damper from the fork’s lower leg.
    • Follow up by removing the air spring from the fork’s stanchion tube.
  5. Remove the lower legs:
    • Use an 8mm Allen wrench to remove the bolts securing the lower legs to the stanchion tubes.
    • Gently slide the lower legs off the stanchions. Be cautious not to damage the seals or bushings during this step.

Inspection and Cleaning

Once the fork is fully disassembled, it’s time to inspect all the components and clean them thoroughly.

  1. Inspect the stanchion tubes and lower legs:
    • Check the stanchion tubes for scratches or scoring, which may affect the performance of the fork’s seals and increase friction.
    • Inspect the lower legs for wear on the bushings and seals. Any damaged or worn parts should be replaced immediately.
  2. Clean the parts:
    • Use a soft cloth and suspension cleaner to clean the stanchion tubes, lower legs, and other components.
    • Ensure that the damper, air spring, and internal seals are free of dirt and debris.
  3. Lubricate the components:
    • Apply a light coating of grease to the bushings and any other moving parts that require lubrication.
    • Be careful not to apply grease to the suspension seals, as this can cause them to deteriorate prematurely.

Rebuilding the Fork

Now that all components are cleaned and inspected, it’s time to rebuild the fork.

  1. Install the air spring:
    • Carefully insert the air spring into the stanchion tube.
    • Ensure that the air spring is fully seated and that no debris or dirt is present around the seal area.
  2. Reinstall the damper:
    • Insert the damper into the lower leg of the fork, ensuring it is properly aligned.
    • Tighten the damper bolts to the manufacturer’s recommended torque using a torque wrench [paid link].
  3. Reassemble the lower legs:
    • Slide the lower legs back onto the stanchions.
    • Ensure the stanchions are properly aligned with the lower legs to avoid any misalignment issues.
    • Tighten the bolts that secure the lower legs using an 8mm Allen wrench.
  4. Add suspension fluid:
    • Using the fork oil syringe, add the recommended amount of suspension fluid to the lower legs.
    • Follow the manufacturer’s guidelines for fluid levels, as too little or too much fluid can affect the performance of the fork.
  5. Install the top cap and compression unit:
    • Reinstall the compression unit into the stanchion tube, ensuring it is securely seated.
    • Tighten the top cap using a 5mm Allen wrench, ensuring it is torqued to the manufacturer’s specifications.

Adjusting the Fork

After rebuilding your Recon RL SL suspension fork, it is essential to adjust the settings for optimal performance based on your riding preferences.

  1. Set the air pressure:
    • Using a shock pump, add air to the air spring according to your weight and riding style.
    • Adjust the pressure until you achieve the desired amount of sag (typically around 20-30% of the fork’s travel).
  2. Adjust the rebound damping:
    • Turn the rebound knob at the bottom of the right leg to adjust the speed at which the fork returns after compression.
    • A slower rebound is better for rough terrain, while a faster rebound is suited for smoother trails.
  3. Set the compression damping:
    • Use the compression knob (located on the left leg) to adjust the low-speed compression. A firmer setting is ideal for smoother trails, while a softer setting is better for technical descents and rough terrain.

Troubleshooting Common Fork Issues

  1. Fork feels too soft or too firm:
    • Check the air pressure. If the fork feels too soft, increase the pressure. If it feels too firm, decrease the pressure.
    • If adjusting the air pressure doesn’t solve the issue, inspect the air spring for damage or wear.
  2. Fork is not returning properly (slow rebound):
    • Check the rebound damping setting. If it’s set too slow, adjust the rebound knob to a faster setting.
    • If the issue persists, inspect the internal damper for any signs of damage or fluid leakage.
  3. Noise during use:
    • Noise can often be attributed to lack of lubrication or wear on the bushings. Make sure the fork is well-lubricated and that all seals are in good condition.

Final Installation

After making the necessary adjustments and ensuring the fork is functioning correctly, it’s time to reinstall the fork on your bike.

  1. Reinstall the fork into the headset:
    • Carefully slide the fork back into the headset and tighten the headset preload bolts.
    • Reinstall the stem and tighten the bolts to the recommended torque specifications.
  2. Reattach the brake caliper:
    • Reattach the brake caliper to the fork’s post mount using the T25 Torx wrench.
    • Ensure the brake rotor is properly aligned within the caliper before tightening the bolts.
  3. Reinstall the front wheel:
    • Slide the wheel back into the fork dropouts and secure it with the quick-release skewer or thru-axle.

Conclusion

Rebuilding the RockShox Recon RL SL suspension fork can be a straightforward process if done methodically and carefully. By following this step-by-step guide, you’ll ensure that your fork is in top condition, providing optimal performance on your rides. Regular maintenance, including cleaning, lubrication, and proper adjustment, will extend the life of your fork and keep you riding smoothly.