Description
Motone Polished Chrome Timing Cover MMU043 – Mirror-Finish Engine Cover for Triumph Modern Classic
Elevate your Triumph’s visual appeal with the Motone Polished Chrome Timing Cover MMU043—a show-quality engine component featuring a mirror-polished chrome finish that transforms your engine bay into a statement piece. Replacing the stock plastic timing cover with precision-machined aluminum and premium chrome plating, the MMU043 delivers both stunning aesthetics and superior protection for your timing components during daily commutes and weekend rides.
Key Features
- Mirror-Polished Chrome Finish → Creates a brilliant reflective surface that complements chrome accents and classic Triumph styling while providing corrosion resistance superior to painted plastics
- Triple-Layer Chrome Plating → Professional-grade copper-nickel-chrome electroplating process ensures long-lasting shine and protection against road salt, moisture, and environmental degradation
- CNC-Machined Aluminum Base → Precision-engineered from 6061-T6 aerospace-grade aluminum provides superior impact resistance compared to fragile plastic covers
- Enhanced Thermal Management → Aluminum construction conducts heat away from timing components 3x more efficiently than stock plastic, reducing engine bay temperatures
- Direct OEM Fitment → Engineered to exact factory specifications with all original mounting points, bolt patterns, and gasket surfaces for seamless installation
- British Engineering Excellence → Designed and manufactured by Motone in the UK using precision CNC machining and professional chrome plating processes
Technical Specifications
| Specification | Details |
|---|---|
| Material | 6061-T6 Aerospace-Grade Aluminum |
| Finish | Mirror-Polished Triple-Layer Chrome Plating |
| Plating Process | Copper-Nickel-Chrome Electroplating |
| Manufacturing | CNC Machined |
| Weight | 40% lighter than stock plastic cover |
| Thermal Conductivity | 205 W/(m·K) – Superior heat dissipation |
| Corrosion Resistance | Triple-layer chrome protection |
| Installation Time | 15-20 minutes (direct bolt-on) |
| Warranty | 12 months manufacturer warranty |
Compatible Triumph Models
This chrome timing cover is engineered for perfect fitment on the following Triumph Modern Classic motorcycles (2016-present):
- Triumph Street Twin (2016+)
- Triumph Street Scrambler (2017+)
- Triumph Street Cup (2017-2019)
- Triumph Bonneville T100 (2016+)
- Triumph Bonneville T120 (2016+)
- Triumph Thruxton 1200 (2016+)
- Triumph Thruxton RS (2020+)
- Triumph Bonneville Speedmaster (2018+)
- Triumph Bonneville Bobber (2017+)
- Triumph Bonneville Bobber Black (2018+)
- Triumph Speed Twin (2019+)
All models equipped with the 900cc or 1200cc liquid-cooled parallel-twin engine platform.
Installation Guide
Required Tools:
- 10mm socket wrench
- Torque wrench (8-10 Nm range)
- New gasket (recommended, not included)
- Degreaser and lint-free cloth
- Cotton gloves (to prevent fingerprints on chrome)
Installation Steps:
- Ensure engine is completely cool before starting work
- Wear cotton gloves to avoid leaving fingerprints on the polished chrome surface
- Remove the 4 mounting bolts securing the stock timing cover using a 10mm socket
- Carefully remove the stock plastic cover and inspect the gasket surface
- Clean the engine mounting surface thoroughly with degreaser and allow to dry completely
- Install new gasket (if replacing) ensuring proper alignment with mounting holes
- Position the Motone MMU043 chrome cover, aligning all mounting points
- Install mounting bolts and torque to 8-10 Nm in a cross-pattern sequence
- Inspect for proper seating and check for any gaps around the gasket perimeter
- Remove any protective film from the chrome surface and polish with a microfiber cloth
Professional Installation: While this is a straightforward upgrade, if you’re not confident working on engine components, we recommend professional installation at an authorized Triumph service center.
Why Choose Chrome Engine Covers?
Chrome-plated engine components have been a hallmark of classic British motorcycles for decades, and the MMU043 brings this traditional aesthetic to modern Triumph platforms. Beyond visual appeal, chrome plating provides three key advantages:
Aesthetic Impact: The mirror-polished chrome finish creates a stunning focal point in your engine bay, complementing other chrome accents like exhaust headers, pegs, and handlebar controls. The reflective surface catches light dramatically, adding visual depth to your motorcycle’s appearance.
Superior Protection: The triple-layer electroplating process (copper for adhesion, nickel for strength, chrome for shine) creates a barrier significantly more resistant to corrosion than painted plastic. This is particularly valuable for daily commuters facing road salt, moisture, and chemical exposure.
Longevity: Unlike plastic covers that can become brittle, discolored, or cracked over time, properly maintained chrome plating can last decades. The aluminum base provides structural integrity while the chrome layer protects against environmental degradation.
Maintenance & Care for Chrome Finishes
The polished chrome finish requires regular maintenance to preserve its mirror-like appearance:
- Weekly Cleaning: Wipe down with a soft microfiber cloth after each ride to remove road grime before it can bond to the chrome surface. For daily commuters, this prevents buildup that can dull the finish.
- Monthly Polishing: Use a dedicated chrome polish to maintain the mirror finish. Apply polish with a soft cloth in circular motions, then buff to a shine with a clean microfiber towel.
- Corrosion Prevention: Apply a thin coat of chrome protectant or carnauba wax every 2-3 months to create a protective barrier against moisture and road chemicals.
- Periodic Inspection: Check mounting bolts for proper torque every 5,000km or 6 months. Vibration can cause gradual loosening over time.
- Gasket Maintenance: Inspect the gasket seal annually. If you notice any oil seepage around the cover edges, replace the gasket using genuine Triumph parts.
Important: Avoid abrasive cleaners or steel wool that can scratch the chrome surface. Never use harsh chemicals like brake cleaner directly on chrome plating—these can damage the protective layers.
Chrome vs. Brushed Aluminum: Choosing the Right Finish
Motone offers both chrome-plated (MMU043) and brushed aluminum (MMU045) timing covers. Here’s how to choose the right finish for your build:
Choose Chrome (MMU043) if you:
- Prefer classic British motorcycle aesthetics with chrome accents
- Have other chrome components (exhaust, controls, badges) you want to complement
- Build traditional or vintage-inspired Triumph customs
- Don’t mind regular polishing maintenance to preserve the mirror shine
Choose Brushed Aluminum (MMU045) if you:
- Prefer modern, industrial aesthetics with matte finishes
- Want minimal maintenance requirements
- Build contemporary or minimalist customs
- Have other brushed or anodized aluminum components
British Engineering Excellence
Every Motone product is designed and manufactured in the United Kingdom using precision CNC machining and professional-grade finishing processes. The MMU043 timing cover undergoes rigorous quality control testing to ensure perfect fitment, long-term durability, and show-quality chrome plating. Motone’s commitment to British engineering heritage means you’re investing in a component that honors Triumph’s classic styling while meeting modern manufacturing standards.
Quality Guarantee: This product is backed by Motone’s 12-month manufacturer warranty covering defects in materials and workmanship. The chrome plating is guaranteed against peeling, flaking, or discoloration under normal use and proper maintenance. Installation must be performed correctly following torque specifications to maintain warranty coverage.











