Harley-Davidson owners seeking to modify their bikes for improved handling, aesthetics, or ground clearance often turn to lowering kits. These kits are engineered to reduce the overall height of the motorcycle while maintaining structural integrity and ride quality. The installation process for such kits requires careful adherence to technical specifications and manufacturer guidelines. Based on the provided source material, this article outlines the installation instructions, technical considerations, and best practices for lowering kits from Kodlin, a prominent manufacturer of motorcycle accessories for Harley-Davidson models.
Harley-Davidson lowering kits are offered in multiple configurations and are compatible with various Softail and Touring models. According to the source documentation, Kodlin offers both 1-inch and 2-inch lowering kits (part numbers K66031 and K66029, respectively). These kits are designed to work with M8 Softail models and include all necessary hardware and installation instructions. The installation process involves working with the shock absorbers and rear suspension system and often requires the use of specialized tools such as the Kodlin shock compression tool (K66030), which is essential for safely compressing the spring during installation.
The source material also includes detailed installation instructions for a range of related components, such as the M8 Softail license plate bracket, rear LED wiring harnesses, and custom seats. While the focus here is on the lowering kits, it is important to note that these kits may interact with other modifications, such as LED lighting systems or custom fairings. Users are advised to consult official installation guides and verify compatibility with existing modifications before proceeding.
Installation Overview and Tools
Before beginning the installation, users must ensure they have the correct tools and equipment. The source material explicitly states that a shock spring tool is required for safe installation. Kodlin recommends using the Kodlin shock compression tool (K66030), though users may also use other tools as long as they can safely compress the spring. It is explicitly advised not to use automotive strut tools, as they are not designed for motorcycle suspension systems and may cause damage or injury.
The installation process involves the following general steps:
Removing the Rear Shock Absorber
The first step is to remove the existing rear shock absorber. This typically involves disconnecting the shock from the swingarm and the frame. Users should ensure the bike is supported on a stable stand to prevent tipping during this process.Compressing the Spring
Once the shock is removed, the spring must be compressed using the recommended tool. The source material suggests using either a wrench to compress the spring further or finishing the installation and using a thin wrench through the spring coils. It is crucial to follow proper safety procedures during this step to avoid injury.Installing the Lowering Kit
After the spring is compressed, the lowering kit can be installed. The exact procedure may vary depending on the model and type of shock. The source material includes instructions for both 1-inch and 2-inch kits, with specific part numbers listed for each.Reassembly and Testing
Once the lowering kit is installed, the shock must be reassembled and reattached to the bike. After installation, it is important to test the suspension system to ensure it functions properly and that the lowering effect is as expected.
Technical Considerations and Adjustments
The installation of a lowering kit can affect other aspects of the motorcycle's performance. According to the source material, users should be aware of the following considerations:
Chain or Belt Tension
Lowering kits may affect chain or belt tension due to the change in ride height. The source material explicitly states that users should always check and adjust the tension after installation to ensure proper function and prevent damage.Fork Height Adjustment
While fork height adjustment is not required when using lowering kits, users may choose to adjust it for handling improvements. However, it is noted that lowering the bike will reduce ground clearance, which may affect performance on uneven terrain.Pre-Load Adjusters
Users should check if their shocks have external pre-load adjusters by removing the seat and inspecting the upper shock area. The source material refers to the "M8 Softail Shock Types and Lowering Kit Part Number" tech tip for further guidance on this topic.O-Ring Replacement
The source material also addresses the need to replace a broken O-ring, which is essential for sealing the bearing. If an O-ring is found to be damaged, users are advised to contact Kodlin for assistance in sourcing a replacement.
Compatibility and Specific Models
The source material provides detailed installation instructions for multiple part numbers and models. For example:
K66024 and K66025 Lowering Kits
These kits are specifically designed for M8 Softail models and include detailed instructions for use with the Kodlin shock compression tool (K66030).K66026–K66032 Lift Kits
While the focus is on lowering kits, the source material also includes information on lift kits, which serve as the opposite function. These kits are available for a range of Softail and Touring models.M8 Softail License Plate Bracket
The source material also includes installation instructions for license plate brackets, which may be used in conjunction with lowering kits to maintain proper alignment and visibility.Rear LED Lighting Systems
Users who have installed LED lighting systems should ensure that the BCM (Body Control Module) is configured correctly. On models where the turn signals also serve as running and brake lights, the BCM must be set to "Dedicated taillight" mode to prevent conflicts with LED wiring.
Additional Modifications and Accessories
The source material includes a wide range of related modifications and accessories that may be relevant to users installing lowering kits:
LED Lighting Kits
The source material includes wiring diagrams and installation instructions for front and rear LED kits. These kits often require load balancers to prevent hyperflashing and ensure proper function.Custom Seats and Fairings
Installation instructions are provided for custom seats and fairings, which can be used to complement the aesthetic changes introduced by a lowering kit.Trackboards and Shifter Pegs
The source material also includes instructions for installing trackboards and shifter pegs, which may be desirable for users looking to enhance the styling and functionality of their bikes.Throttle Body Compatibility
Users who have upgraded to larger throttle bodies should check the opening size of the backing plate, as it is approximately 64mm in diameter. This ensures compatibility with modified intake systems.
Troubleshooting and Support
The source material includes several frequently asked questions and troubleshooting tips:
Lost Installation Instructions
Users who have lost their installation instructions are directed to the Kodlin Tech Guide, where they can download PDF versions of all available installation guides.Product Availability
If a product is out of stock on the Kodlin website, users are advised to check with local Harley-Davidson dealerships or retailers such as J&P Cycles and Dennis Kirk.Warranty Documentation
For warranty coverage, users must provide a copy of the original invoice, clear photos or videos of the failure, and their contact information. In some cases, the product may need to be returned for inspection.Pickup at Store
The source material notes that in-person pickup is an option, though no further details are provided on the process or availability.
Safety and Best Practices
The installation of a lowering kit involves working with suspension components and high-pressure springs, which requires adherence to strict safety protocols. The following best practices are recommended:
Use Proper Tools
Always use the recommended tools, such as the Kodlin shock compression tool (K66030), to avoid damage to the spring or injury.Work in a Stable Environment
Ensure the bike is supported on a stable stand during installation to prevent tipping or accidents.Follow Manufacturer Instructions
Refer to the official installation guides and video tutorials provided by Kodlin to ensure accurate and safe installation.Test After Installation
After completing the installation, test the suspension system to ensure it functions properly and that the lowering effect is as expected.
Conclusion
Harley-Davidson lowering kits offer a way for riders to customize their bikes for improved handling, aesthetics, or ground clearance. The installation process involves working with the rear suspension system and requires the use of specialized tools such as the Kodlin shock compression tool. The source material provides detailed installation instructions for a range of models and components, ensuring that users have the necessary information to complete the installation safely and effectively.
Users are advised to verify compatibility with existing modifications and follow all manufacturer guidelines to ensure proper function and safety. Additional modifications such as LED lighting systems, custom seats, and trackboards can complement the lowering kit and enhance the overall appearance and functionality of the bike.
By following the recommended installation steps, using the correct tools, and testing the system after installation, users can achieve a successful and safe modification that enhances their riding experience.