Product Overview
The Kuryakyn 9128 Rear Master Cylinder Cover is a chrome accent accessory designed to enhance the appearance of your motorcycle's rear master cylinder. This one-piece cover provides a clean, integrated look, concealing the master cylinder and related components. It is engineered for straightforward installation.

Image 1: Kuryakyn 9128 Chrome Rear Master Cylinder Cover installed on a Harley-Davidson motorcycle. The cover is visible near the footpeg and exhaust pipe, providing a polished, integrated appearance to the rear master cylinder area.
Parts Included
Verify that all components are present before beginning installation:
- (1) Chrome Master Cylinder Cover with Sight Lens
- (1) Hardware Kit for Master Cylinder Cover, including:
- (2) Stand-off Studs
- (2) 8-32 X 5/16” Button Head Cap Screws
Suggested Tools (not included): Phillips Screwdriver, 5/16” Combination Wrench, Allen Wrenches.
Compatibility
This Kuryakyn 9128 Rear Master Cylinder Cover is compatible with the following Harley-Davidson models:
- 1999-2007 Electra Glides
- 1999-2007 Road Glides
- 1999-2007 Road Kings
- 1999-2007 Street Glides
- 2009-2013 H-D Trikes
- 2000-2017 Softail Models
Ensure your motorcycle model and year fall within these specifications for proper fitment.
Installation Instructions
Follow these steps for a quick and secure installation of your Kuryakyn 9128 Rear Master Cylinder Cover. It is recommended to perform this installation on a cool, stable motorcycle.
- Prepare the Area: Ensure the rear master cylinder area is clean and free of dirt or debris.
- Position the Cover: Carefully place the chrome master cylinder cover over the existing rear master cylinder. The cover is designed to fit snugly over the original components.
- Install Stand-off Studs: Insert the two stand-off studs into the designated mounting points on the motorcycle, if applicable, or into the cover itself, aligning them with the existing master cylinder.
- Secure with Screws: Use the provided 8-32 X 5/16” Button Head Cap Screws to secure the cover. Use a Phillips screwdriver and/or Allen wrenches as needed. Tighten screws gently to avoid stripping threads.
- Final Check: Verify that the cover is securely mounted and does not interfere with any moving parts or controls. Ensure the sight lens is clear and functional.
Installation typically requires only two fasteners and is designed to be a quick process.
Maintenance
To maintain the appearance and integrity of your Kuryakyn 9128 Chrome Rear Master Cylinder Cover:
- Cleaning: Clean the chrome surface regularly with a soft cloth and a non-abrasive chrome cleaner. Avoid harsh chemicals or abrasive materials that could scratch the finish.
- Inspection: Periodically inspect the cover and its mounting hardware for any signs of looseness or damage. Re-tighten fasteners if necessary, but do not overtighten.
- Brake Fluid Check: The cover includes a sight lens. Regularly check your brake fluid level through this lens as part of your motorcycle's routine maintenance.
Troubleshooting
This section addresses common issues that may arise during or after installation.
- Cover Does Not Fit: Double-check the compatibility list to ensure your motorcycle model and year are supported. Verify that you have the correct Kuryakyn part number 9128.
- Loose Cover: Ensure all screws are properly tightened. If the cover still feels loose, inspect the stand-off studs and mounting points for any damage or misalignment.
- Scratches/Damage: If the chrome finish is scratched, specialized chrome polish may help reduce the appearance of minor scratches. For significant damage, replacement may be necessary.
If you encounter issues not covered here, please refer to the support information below.
Specifications
| Brand | Kuryakyn |
| Model Number | 9128 |
| Item Weight | 4.8 ounces |
| Product Dimensions | 6.5 x 5.5 x 2.2 inches |
| Material | Chrome-plated (implied by description) |
| Special Features | Integrated sight lens, one-piece design |
Warranty and Support
For warranty information or technical support regarding your Kuryakyn 9128 Rear Master Cylinder Cover, please contact Kuryakyn directly through their official website or customer service channels. Keep your purchase receipt and product information handy when contacting support.
Manufacturer: Kuryakyn
Website: Visit the Kuryakyn Store on Amazon (for general brand information)





