How to Service Your Bluto RL Suspension Fork at Home

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Servicing your Bluto RL suspension fork at home can be a rewarding experience that not only saves money but also ensures that your bike performs at its best. The Bluto RL, designed by RockShox, is a popular choice for fat bike riders, known for its plush feel and adjustable features. Regular maintenance is crucial for optimizing performance and extending the lifespan of your fork. This guide will walk you through the steps to service your Bluto RL suspension fork, covering everything from basic maintenance to troubleshooting common issues.

Tools Required

To service your Bluto RL suspension fork at home, you’ll need the following tools:

  • 5mm, 6mm, and 8mm Allen wrenches [paid link]
  • 32mm suspension oil
  • RockShox suspension grease
  • Shock pump (for adjusting air pressure)
  • Torque wrench [paid link]
  • Cleaning rags
  • A basin for draining old oil
  • T20 Torx driver
  • Suspension fork seals kit
  • Rubber mallet
  • Specialized suspension fluid (e.g., 0.3 wt oil for damper side)
  • Snap-ring pliers

Understanding the Bluto RL Suspension Fork

The RockShox Bluto RL suspension fork is designed for fat bikes and offers several key features including a remote lockout (RL), adjustable air spring, and a compression damping system. This fork uses a combination of air pressure and damping oil to provide a smooth and controlled ride across rough terrain. Over time, the air spring may lose pressure, and the oil inside the fork can break down, requiring periodic servicing.

Basic Maintenance for the Bluto RL Suspension Fork

1. Cleaning the Fork

Regular cleaning of your Bluto RL fork is the first step in maintenance. This helps prevent dirt and grime from entering the suspension mechanism, which could lead to increased friction and wear.

  • Use a clean rag to wipe down the stanchions of the fork.
  • Ensure that any debris or dirt is removed from the fork’s seals to prevent damage.
  • Pay attention to the dust wipers located at the base of the stanchions. Clean these areas thoroughly to ensure they stay effective.

2. Checking and Adjusting Air Pressure

Air pressure is a crucial factor in the performance of your Bluto RL fork. The fork’s air spring determines how much sag you’ll experience on the trail. Proper air pressure ensures that the fork is responsive to terrain and that you’re getting the correct amount of support.

  • Use a shock pump to check the air pressure in the positive chamber.
  • The recommended air pressure is typically marked on the side of the fork, but this can vary based on rider weight and preference.
  • Adjust the pressure to achieve around 20-30% of sag, which is a common setting for most riders.

3. Checking Lockout Function

The remote lockout feature on the Bluto RL allows you to lock the suspension when riding on smooth terrain, like roads, to improve efficiency.

  • Ensure the lockout lever works correctly. The fork should fully lock when engaged and offer no movement.
  • If the lockout is not functioning properly, it may require a damper service, which involves draining and replacing the suspension oil.

Servicing the Bluto RL Fork

1. Draining and Replacing the Suspension Oil

Over time, the suspension oil inside the fork will degrade, losing its viscosity and reducing performance. Draining and replacing the oil regularly is an essential part of fork maintenance.

Steps:

  • Remove the front wheel and disconnect the fork from the bike.
  • Use the T20 Torx driver to remove the screws securing the lowers to the fork.
  • Slide the lowers off the stanchions. Be cautious to avoid damaging the seals.
  • Drain the old oil into a basin and set it aside for proper disposal.
  • Refill the fork with fresh suspension oil. Be sure to follow RockShox’s recommendations for the correct type and quantity of oil (usually 32mm suspension fluid for the air spring and lighter fluid like 0.3wt for the damper).
  • Reassemble the fork by carefully sliding the lowers back onto the stanchions and tightening the screws.

2. Replacing Fork Seals

The seals in your Bluto RL fork keep dirt and moisture from contaminating the oil inside. If they become worn or damaged, you may notice excessive stanchion movement or oil leakage.

Steps:

  • Remove the lowers as described above.
  • Using the snap-ring pliers, remove the old seals from the fork.
  • Clean the stanchions thoroughly before installing the new seals.
  • Grease the new seals with suspension grease to ensure smooth operation.
  • Carefully press the new seals into place, ensuring they are seated correctly before reassembling the fork.

3. Rebuilding the Damper

If your Bluto RL fork is experiencing issues with compression damping or is not offering a smooth ride, you may need to rebuild the damper. This is a more advanced service procedure and involves disassembling the fork’s damper unit.

Steps:

  • Remove the damper assembly by unscrewing it from the fork.
  • Drain any remaining oil from the damper side.
  • Disassemble the damper unit and clean all internal components.
  • Refill the damper with the appropriate suspension fluid and reassemble the unit.
  • Reinstall the damper into the fork and ensure everything is sealed properly.

Troubleshooting Common Issues

1. Fork Feeling Too Soft

If your Bluto RL fork feels too soft and bottoms out frequently, this may indicate that the air pressure is too low or the suspension oil is too light.

  • Check and increase the air pressure to the recommended range.
  • Consider adding more suspension oil if it has leaked or was not replaced correctly during the last service.
  • Verify that the fork’s internal components, like the damper and seals, are functioning properly.

2. Fork Not Locking Out

If the lockout feature is not engaging or the fork does not lock out fully, this may indicate a problem with the damper oil or internal components.

  • Check the oil level in the damper side and replace it if necessary.
  • Inspect the lockout mechanism for any signs of wear or obstruction. A thorough cleaning and fresh oil should restore its function.
  • If the issue persists, you may need to consult a professional mechanic to examine the lockout system further.

3. Leaking Oil

If you notice oil leakage around the fork’s seals, this is often a sign of worn or damaged seals.

  • Inspect the seals for visible damage or wear and replace them if necessary.
  • Ensure the fork was reassembled correctly after servicing, and that the lowers are properly tightened.
  • Regularly clean the seals to ensure dirt doesn’t build up, which could cause further wear.

Customizing and Optimizing the Bluto RL Fork

To get the most out of your Bluto RL fork, customization and fine-tuning are essential. Adjusting the air pressure, compression settings, and even the oil type can greatly impact performance, especially for different types of riding conditions.

  • Air Pressure: As mentioned, adjusting the air pressure can affect the ride quality. Lighter air pressure is suitable for rougher terrain and more sensitive control, while higher pressure can help maintain stability on smoother trails.
  • Compression Settings: The Bluto RL fork allows you to fine-tune compression damping. Experiment with different settings to find the best balance between support and comfort based on your riding style and terrain.
  • Oil Type and Weight: The type of oil used in the fork can affect how responsive the suspension is. Experiment with heavier or lighter oils to optimize the ride based on your preferences and riding conditions.

Comparison with Other Fat Bike Forks

The Bluto RL is a great choice for fat bikes, but how does it compare to other suspension forks in the market? Forks like the Manitou Mastodon and Fox 34 Float have similar features but offer different feel and performance characteristics.

  • Manitou Mastodon: Known for its stiffness and slightly firmer feel, it may be better for riders who prioritize stability over comfort.
  • Fox 34 Float: Offers a more plush feel compared to the Bluto RL and may be preferred by riders looking for a smoother, more comfortable ride over technical terrain.

When choosing between these forks, consider your riding style and terrain. The Bluto RL stands out for its balance between performance and value, offering solid support and adjustability for fat bike enthusiasts.

Conclusion

Servicing your RockShox Bluto RL suspension fork at home can help you keep your bike in top condition, ensuring a smooth and responsive ride. Regular maintenance, including oil changes, seal replacement, and air pressure adjustments, is crucial for preserving performance. By following the steps outlined in this guide, you can troubleshoot common issues, optimize your fork’s performance, and extend its lifespan.