OFFRAMP interprets the raw, brutal aesthetics of Harley through its latest product.

We present the revolutionary Sliding-Transparent Derby Cover. It’s not just a direct replacement for the stock cover; it’s an engineering masterpiece that merges ultimate visual appeal with ultimate protection.

• Visual Engine, Stunning Display: The cover features a precision CNC-machined aerospace aluminum frame that supports a high-transparency polycarbonate window. While ensuring complete enclosed protection, it provides a dynamic display portal, turning every intense movement of the internal clutch pack into a captivating visual focus.

• Racing Protection, Secure Cornering: This goes far beyond mere decoration. At its core is an integrated high-performance Delrin (POM) sliding block. Born for aggressive riding, it actively protects your valuable primary case from pavement scratches when you’re deep in a left-hand corner. The included replaceable Delrin slider ensures this top-tier protection lasts.

• Dual Compound, Unified in One Design: Now, you no longer have to choose between “show” and “protection.” You can safely showcase your trick clutch, expressing mechanical beauty while gaining track-ready, practical defense.

The OFFRAMP Sliding-Transparent Derby Cover redefines customization with precision engineering. It aims to simultaneously elevate your motorcycle’s stunning aesthetics, practical functionality, and core protection—making it the perfect accessory for riders who pursue extreme quality and personalized expression.

Key Features:

• Provides a clear view into the internal engine components.

• Equipped with a replaceable Delrin slider to protect your primary case.

• Comes with a decorative aluminum ring that is anodized and available in multiple colors, allowing for customizable color matching.

• Direct bolt-on replacement for your stock primary cover.

• Utilizes high-temperature-resistant transparent panels to ensure an oil-tight seal and prevent leaks.

• Withstands temperatures up to 135°C (275°F), suitable for demanding high-temperature environments.

• CNC-machined from solid aluminum billet and polycarbonate.

• Features a precision machined OFFTRAMP logo.

Important Safety Notice & Design Principle

• If your slider is cracked, worn, or bent, it has successfully fulfilled its purpose. This is by design.
• This component is engineered as a sacrificial safety element. Its core function is to absorb impact energy through controlled deformation and failure. It is not intended to remain rigid. If it were too hard and did not collapse as designed, the impact force would be transferred directly to your motorcycle’s frame or primary case—components that are much more costly to repair.
• Additionally, a damaged slider may have sharp edges or not detach cleanly, which can snag on external objects and increase the risk of losing control. For your safety, replace a worn or damaged slider promptly.
• This design prioritizes your protection and minimizes potential damage to critical motorcycle parts.

Click the image below to browse the Derby Cover Delrin Slider Replacement.

Note: Please ensure your motorcycle’s model and year are listed above for proper fitment.

Details