Brass/Aluminum Crankcase Covers - TRIUMPH Bobber & Classics

• 🛡️ Protection and style : dresses the engine while protecting the crankcases

• ⚙️ Plug & play installation : attaches to the original points, no modification

• 🪙 Premium finishes : hand-polished brass, brushed aluminum, black-treated

• 🧲 Wide compatibility : Bobber, Speedmaster and Classics

• 🔩 Optional titanium screws : light and durable fastening

Premium crankcase covers for TRIUMPH Bobber & Classics

Elevate your engine’s finish with robust, elegant covers that are easy to install

Give your twin more character while protecting its internals with these crankcase covers designed for Bobber, Speedmaster and Modern Classics models. Available in hand-polished brass for an irresistible vintage look, in aluminum for lightness and understatement, as well as in black-treated finishes (black copper / black silver) for a more discreet, muscular style, they instantly enhance the left and right sides of the engine.

Each piece fits perfectly on the original mounting points. Choose the configuration that suits you: large left cover, small right cover and a matching oil cap cover (called “oil bottle cover” in the options). To complete the set, titanium alloy screws (gold or black) are available, bringing a technical touch and a welcome weight saving.

Whether you’re aiming for a cafe racer, bobber or classic aesthetic, these covers deliver a high-end, durable finish that aligns with your bike’s DNA. The result: a better-protected, more refined-looking engine and customization that stands out at first glance.

Compatibility for TRIUMPH (2016+):

• Bonneville Bobber

• Speedmaster

• Bonneville T120

• Bonneville T100

• Street Twin

• Street Scrambler 900

• Speed Twin 900

Technical specifications:

• 🛠 Type: decorative and protective engine crankcase covers (left, right) + matching oil cap cover

• 💎 Finishes: hand-polished brass, brushed aluminum “white”, black-treated (black copper / black silver)

• 💪 Material: solid brass or CNC-machined aluminum; optional titanium alloy screws (gold or black)

• 📏 Mounting: direct replacement on original anchor points, no modification

• 🧽 Care: brass patinates naturally (can be repolished); aluminum and black finishes are easy to clean

• ⚖️ Weight: light depending on version (around a few hundred grams per piece)

• 🧩 Available options: large left cover, small right cover, oil cap cover, titanium screw kit

Advantages over stock:

✔ Significantly enhanced aesthetics (premium, cohesive look)
✔ Noble materials (brass, aluminum) with higher perceived quality
✔ Durable finishes resistant to micro-scratches
✔ Simple, reversible, no-mod installation
✔ Modular customization (choice of pieces and titanium screws)

Why upgrade the stock part?

Stock engine covers prioritize functionality and cost rationalization. The result: a finish that’s sometimes too basic and a style that lacks depth for a personalized build.

• Standard visual appearance, not very distinctive

• Finishes that quickly show signs of use

• Few “ready-to-install” customization options

These crankcase covers solve those issues: premium materials, refined finishes, plug & play mounting and accessories (titanium screws) for complete, durable customization in line with your bike’s spirit.

Ideal use:

• Bobber, classic or cafe racer builds seeking high-end details

• Owners of Bobber/Speedmaster wanting to harmonize the engine’s left and right sides

• Lovers of noble materials (brass, aluminum) and patinable finishes

• Daily use or weekend rides with aesthetic and durability requirements

• Progressive customization thanks to options (oil cap cover, titanium screws)