The RockShox Lyrik Ultimate MY25 [paid link] is a top-tier suspension fork that delivers impressive performance for aggressive trail and enduro riders. Fine-tuning this fork to suit your riding style and terrain can make a significant difference in your overall ride experience. This guide will provide detailed instructions on how to install, adjust, maintain, and troubleshoot your Lyrik Ultimate MY25 [paid link], helping you get the most out of your investment.

Tools Required

• 5mm and 8mm Allen wrenches [paid link]
• Torque wrench [paid link]
• Suspension fluid (appropriate for the Lyrik Ultimate MY25)
• Hydraulic fork fluid
• Dropper seat post tool (if applicable)
• Suspension pump
• Clean rags or paper towels
• Pliers (for removing air valve cores)
• 20mm thru-axle wrench (if necessary)
• Cleaning brush
• Silicone grease

Installation of the Lyrik Ultimate MY25

Installing the Lyrik Ultimate MY25 fork requires careful attention to detail to ensure everything is correctly aligned and functioning. Follow these steps to install your new fork:

1. Remove the old fork: Begin by removing your old suspension fork, following the specific instructions for your bike. Ensure that the head tube is clean and free of old grease or debris.
2. Install the headset and bearings: Before installing the fork, ensure the headset and bearing system in the frame are in excellent condition. Lubricate the headset with a thin layer of grease to prevent squeaks and ensure smooth operation.
3. Mount the Lyrik Ultimate MY25 fork: Insert the fork into the head tube and secure it in place. Tighten the upper headset cap (if applicable) with a torque wrench [paid link], ensuring it is snug but not overly tight.
4. Attach the front wheel: With the fork in place, install the front wheel using the 20mm thru-axle or any other required system depending on your bike’s compatibility.
5. Check alignment and tightness: Ensure the fork is aligned with the frame and the wheel is correctly centered. Tighten all bolts according to manufacturer specifications.
6. Set air pressure: Using a suspension pump, adjust the air pressure in the fork to match your rider weight and riding style.

Adjusting the Lyrik Ultimate MY25 for Optimal Performance

The Lyrik Ultimate MY25 fork comes with various adjustments, including rebound, compression, and air pressure settings. Here’s a breakdown of the key adjustments and how to make them for optimal performance:

Air Pressure

Setting the correct air pressure is essential for balancing comfort and performance. The Lyrik Ultimate MY25 uses a DebonAir air spring that requires specific air pressure based on your weight.

1. Measure your weight: Use a suspension pump to ensure your air pressure matches the manufacturer’s recommended range. The correct air pressure ensures proper fork sag, which is the amount the fork compresses under your body weight.
2. Adjust for sag: Ideally, your fork sag should be between 20-30% of the total fork travel. You can check this by compressing the fork while holding the bike, then measuring the amount of travel used.

Compression Damping

The compression damping affects how the fork responds to bumps and impacts. The Lyrik Ultimate MY25 features both high-speed and low-speed compression adjustments.

1. Low-speed compression: This controls the initial part of the fork’s travel and is crucial for small bumps. Turn the knob clockwise to increase damping (firmer feel) or counterclockwise to decrease it (softer feel).
2. High-speed compression: This controls how the fork handles bigger impacts. Adjusting the high-speed compression can prevent the fork from bottoming out during big hits. Start with the manufacturer’s recommended setting and fine-tune based on the terrain.

Rebound Damping

Rebound damping determines how quickly the fork returns to its full extension after compression. Too fast, and you’ll feel bouncy; too slow, and the fork might stay compressed.

1. Adjust the rebound knob on the bottom of the fork leg to change the speed of rebound. Turn it clockwise for a slower rebound and counterclockwise for a faster rebound.
2. Test the fork by compressing and releasing it. If it feels too sluggish or too quick, make further adjustments.

Hydraulic Lockout

The Lyrik Ultimate MY25 is equipped with a hydraulic lockout feature that allows you to stiffen the fork for climbing or road sections.

1. To engage the lockout, simply turn the lockout dial until you feel resistance. This will prevent the fork from compressing under your weight.
2. For downhill or technical sections, ensure the lockout is disengaged to allow full suspension travel.

Maintenance of the Lyrik Ultimate MY25

Maintaining your Lyrik Ultimate MY25 fork will ensure its longevity and optimal performance. Regular servicing and cleaning are necessary, especially for riders who tackle rough trails frequently.

1. Clean the fork: After each ride, wipe down the stanchions with a clean rag to remove dirt and debris. This prevents contaminants from entering the seals and damaging the internals.
2. Lubricate the seals: Apply a small amount of suspension grease to the fork’s seals to ensure they stay lubricated and free from wear.
3. Service the air spring: Over time, the air spring will require maintenance. Perform a full service every 100-150 hours of riding, or when the fork feels less responsive.
4. Change the oil: Fork oil should be replaced every 150-200 hours of riding to maintain proper damping performance. Follow the manufacturer’s recommended oil levels and types for the Lyrik Ultimate MY25.

Troubleshooting Common Set-Up Issues

Fork Bottoming Out

If you notice that your fork bottoms out too often, it could be a sign of insufficient air pressure or incorrect compression settings.

• Solution: Increase the air pressure to ensure proper sag, or adjust the compression settings for a firmer feel. Ensure the fork is set up for your weight and riding style.

Harsh Ride Feel

A harsh or overly stiff ride could be a result of too much low-speed compression damping or insufficient air pressure.

• Solution: Decrease the low-speed compression to allow for more plushness, or decrease the air pressure for more compliance.

Excessive Rebound

If your fork feels bouncy or springs back too quickly after a compression, the rebound damping might be too fast.

• Solution: Slow down the rebound by turning the knob clockwise, which will control the fork’s return speed.

Customization and Optimization for Better Performance

The Lyrik Ultimate MY25 offers several options for customization, allowing riders to fine-tune their suspension setup.

1. Adjust air pressure based on terrain: Riders who frequent rough, technical trails might benefit from slightly lower air pressure for a more supple ride, while riders who focus on aggressive downhill riding may need to increase air pressure for more support.
2. Fine-tune compression settings: By adjusting both high-speed and low-speed compression, you can optimize the fork for various trail conditions. A firmer compression setting is ideal for climbing, while a softer setting provides more comfort for descending.
3. Use aftermarket seals: For riders who often ride in muddy or wet conditions, upgrading to aftermarket seals may improve durability and performance by preventing contamination from entering the fork.

Compatibility with Other Drivetrain Components

The RockShox Lyrik Ultimate MY25 is designed to work seamlessly with most modern mountain bike drivetrains. However, it’s important to ensure compatibility with other components like the headset, stem, and wheels.

1. Headset Compatibility: The Lyrik Ultimate MY25 is compatible with a variety of headsets, including tapered and straight types. Ensure your bike’s frame is compatible with the fork’s steerer tube size (typically 1.5” to 1-1/8”).
2. Wheel Compatibility: The fork is designed for 27.5” or 29” wheels and typically uses a 20mm thru-axle system for enhanced stiffness and wheel retention.
3. Brake Mounts: The Lyrik Ultimate MY25 uses Post Mount brake mounts, so make sure your brake calipers are compatible with this system. Most modern disc brakes work well with the Lyrik fork.

By carefully adjusting, maintaining, and customizing the Lyrik Ultimate MY25, you can enhance your bike’s performance and make it better suited to your riding style. Whether you’re navigating rough trails, climbing steep gradients, or descending with precision, these suspension adjustments will make a noticeable difference in your ride.