FIRST THINGS FIRST
TUNING
Before you start riding, ensure the initial settings configured by Racingbros are still properly in place. It's important to take notes, make adjustments gradually, and modify only one parameter at a time.
The following adjustment process will help you initialize your suspension settings. Regular maintenance is key to ensuring long-term performance and a smooth riding experience. We wish you safe and enjoyable rides at all times!
WARNING
Modifying suspension settings can significantly affect handling and may overload components if changes are extreme.
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Only adjust within the recommended range.
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After adjustments, ride slowly at first to familiarize yourself with the new handling.
Failure to follow these instructions may result in product failure, damage, property loss, or personal injury. Damage caused by tampering with or modifying chassis components is not covered under warranty.
Step 1: Adjust Preload
Preload Adjustment for Optimal Sag (A-B)
Suspension pre-load adjustment is vital, affecting bike height and front fork angle. Rider weight compresses shock absorbers, causing sag. Measure bike height fully extended (A) and compressed with rider (B). 20±10mm is recommended.
Front-fork / kits
Rear-shock
RACINGBROS offers four types of adjusters.
Please verify the type you have before making adjustments.
Hydraulic - Revolver
Adjuster
Hydraulic - Hex
12 mm wrench
Adjustment pins
Shock spanner
Quick Spring Setup Sheets for Popular Models
Verify the correct spring setup height based on the total rider and accessories weight. Refer to the categories below and adjust the rear spring height with the wheels off the ground.
Harley-Davidson
Step 2: Set Rebound
Rebound Adjuster Settings
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Harley-Davidson Products: 12 ± 3 clicks out from fully closed
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Metric bikes: 9 ± 3 clicks out from fully closed
Fine-tune in increments of two clicks as needed.
Decrease damping
rebound quicker
Increase damping
rebound slower
- Unstable
- Loose
- Bouncy
- Bumpy
- Hard
When it's unstable, loose, or bouncy, tighten rebound clockwise for a slower response.
When it's bumpy, turn the rebound counterclockwise for a quicker response.
RACINGBROS offers three types of adjusters.
Please verify the type you have before making adjustments.
Rear-shock Type A
Slotted screwdriver
Rear-shock Type B
Slotted screwdriver
Front-fork / kits
3 mm Allen Key
Step 3: Adjust Compression
High/Low-Speed Compression Adjustment
Set to 20 ± 5 clicks out from fully closed.
Fine-tune in increments of two clicks as needed.
Decrease damping
compress quicker
Increase damping
compress slower
- Unstable
- Low
- Bottom
- Soft
- Bumpy
- Rough
- Harsh
When it's unstable, loose, or bouncy, tighten compression clockwise.
When it's bumpy, rough, or harsh, turn the compression counterclockwise.
Rear-shock
Slotted screwdriver
Front-fork / kits
3 mm Allen Key