NORTON WM19-2.5 Commando Dunstall Rear Wheel Brake Drum 750CC 2003B
fits model: 750, Roadster. year: 1971.
( Brand: Norton ), ( Manufacturer Part Number: WM19-2.5 ), ( Part Type: Wheel Brake ), ( Wheel Width: 2.5 )
Review NORTON Commando 750cc Dunstall 2003 Rear Wheel Brake Drum fits ROADSTER 750 1971
The **Norton WM19-2.5 1971 Commando 750cc Dunstall Roadster (2003B Rear Wheel Brake Drum)** is a meticulously crafted, high-performance classic motorcycle that seamlessly blends vintage charm with modern engineering precision. Built upon the legendary Norton Commando platform, this model represents the pinnacle of British motorcycle design from the early 1970s, refined and restored to an exceptional standard. The **2.5-liter parallel twin engine**, a hallmark of Norton s legendary Commando series, delivers a deep, resonant exhaust note that grows richer with each revolution, offering a smooth yet exhilarating power delivery that remains true to its original intent. This engine, paired with the iconic **Dunstall Roadster** bodywork a sleek, aerodynamic fairing that enhances both aesthetics and aerodynamics creates a striking visual contrast between the raw mechanical beauty of the Commando and the streamlined elegance of the modern roadster. The **2003B rear wheel brake drum** system, a nod to classic Norton reliability, ensures a familiar yet robust braking experience, though modern upgrades may have been incorporated to enhance stopping power without compromising the motorcycle s authentic character.
The **1971 Commando 750cc** chassis is a masterpiece of British engineering, featuring a robust **dual-cradle frame** that balances rigidity with ride comfort, while the **beam front fork** and **dual shock rear suspension** provide a classic yet surprisingly modern riding position. The **Dunstall Roadster** fairing, with its sharp lines and aerodynamic contours, not only enhances the motorcycle s visual appeal but also reduces wind resistance, making it a standout among both classic and modern motorcycles. The **2.5-liter engine**, with its distinctive pushrod operation and overhead valves, produces a power output that is both smooth and engaging, capable of propelling the motorcycle effortlessly through corners while maintaining a throaty, growling exhaust tone that resonates with purists. Whether cruising on open roads or navigating twisty backroads, this Norton offers a riding experience that is both nostalgic and dynamically engaging.
Underneath its polished exterior, the **WM19-2.5 Commando** retains the mechanical integrity of its original design, with attention to detail that ensures reliability and performance. The **rear wheel brake drum (2003B)** is a functional yet nostalgic choice, offering a familiar braking feel that many enthusiasts appreciate, though modern riders may find it complemented by upgraded components for improved modulation. The **Dunstall Roadster** fairing, often custom-built or meticulously restored, adds a contemporary twist to the classic Norton aesthetic, making this motorcycle a versatile choice for both showroom displays and spirited rides. Whether admired for its historical significance or celebrated for its modern refinements, this Norton WM19-2.5 Commando 750cc Dunstall Roadster stands as a testament to British motorcycle craftsmanship, blending heritage with innovation in a way that appeals to both classic purists and forward-thinking riders.
### **Pros and Cons of Buying a Norton WM19-2.5 1971 Commando 750 (2003B Rear Wheel Brake Drum)**
#### **Pros**
1. **Classic British Motorcycle Heritage**
The Norton Commando is an iconic British motorcycle, known for its timeless design, mechanical simplicity, and strong engineering roots. Owning one connects you to a rich history of motorcycle culture, particularly the golden era of British bikes.
2. **Mechanical Simplicity and Reliability**
Norton Commandos are renowned for their straightforward mechanical design, with a single overhead camshaft, pushrods, and a robust engine layout. This simplicity makes them easier to maintain compared to modern, complex motorcycles. Many parts are still available, and the engine is forgiving of neglect if properly cared for.
3. **Strong Engine Performance**
The 750cc parallel twin engine (originally developed in the 1960s) is a classic example of British engineering. With proper maintenance, it can produce reliable power around 50-60 bhp making it suitable for cruising, touring, or light track use. The 2003B model (with the rear drum brake) is a later variant that refined earlier issues.
4. **Modification Potential**
The Commando platform is highly modifiable. Owners can upgrade components such as the engine (e.g., installing a more modern camshaft or cylinder head), suspension (e.g., aftermarket forks or shocks), and exhaust systems. The 2003B model s drum brake setup can be upgraded to disc brakes if desired, though this requires some mechanical skill.
5. **Affordable Running Costs**
Compared to modern motorcycles, fuel and maintenance costs are relatively low. Parts like spark plugs, chains, and basic consumables are inexpensive. While labor costs may be higher due to the bike s complexity, the overall cost of ownership is often lower than that of a modern sportbike or cruiser.
6. **Vintage Aesthetic and Customization**
The Commando s retro styling appeals to enthusiasts who appreciate classic motorcycles. It can be easily customized with period-correct or modern accessories, from chrome detailing to modern fairings. The roadster configuration (without a windscreen or luggage) makes it ideal for a minimalist, open-air riding experience.
7. **Community and Support**
Norton Commandos have a dedicated following, with active forums (e.g., Norton Commando Owners Club), meetups, and aftermarket support. This community provides resources for troubleshooting, parts sourcing, and restoration advice, making ownership more accessible.
8. **Track and Racing Potential**
While not a modern race bike, the Commando can be prepared for light track use or club racing. Its robust frame and engine can handle modified setups, and there are enthusiasts who compete in historic or classic motorcycle events.
9. **Lower Insurance Costs (Compared to Modern Bikes)**
Insurance for a classic Commando is often cheaper than for a high-performance modern motorcycle, especially if it is registered as a classic or vintage bike.
10. **Nostalgia and Riding Experience**
The Commando offers a different riding experience than modern bikes, with a heavier, more traditional feel. The lack of advanced electronics (e.g., no ABS, traction control, or fuel injection) means a more "hands-on" approach to riding, which can be appealing to purists.
---
#### **Cons**
1. **Aging and Wear**
The 1971 Commando (even a later model like the 2003B) is over 50 years old, and parts may be worn or degraded over time. Common issues include:- **Engine wear**: Pistons, bearings, and camshafts can wear out, requiring rebuilds or replacements.
- **Transmission**: The gearbox may develop play or synchro issues, especially if not regularly serviced.
- **Frame and Forks**: The frame and early suspension components (e.g., telescopic forks) can rust or weaken, requiring attention.
2. **Maintenance Intensity**
While the bike is mechanically simple, it requires **regular and thorough maintenance** to stay reliable. This includes:- Frequent oil changes (the engine is not as forgiving as modern designs).
- Chain and sprocket adjustments (the drum brake setup adds complexity to rear wheel maintenance).
- Periodic checks on the carburetion (Amal or later Mikuni setups can drift over time).
- Rust prevention (especially in humid climates).
3. **Limited Modern Comfort and Safety Features**
The Commando lacks modern safety features such as:- **Disc brakes** (the 2003B retains the rear drum brake, which is less effective than discs, especially in wet conditions).
- **ABS or traction control**.
- **Modern ergonomics** (the riding position is upright and heavy, which can be tiring on long rides).
- **Wind protection** (the roadster configuration offers no windscreen, making high-speed riding uncomfortable).
4. **Fuel Efficiency and Power Delivery**
The 750cc parallel twin is not fuel-efficient by modern standards, averaging around **40-50 mpg**. The power delivery is also less refined than modern bikes, with a noticeable lag and a "thumpy" exhaust note that some find intrusive.
5. **Parts Availability and Costs**
While parts are available, some components (e.g., rare engine parts, period-correct carburetors, or specific frame sections) can be expensive or difficult to source. Rebuilding the engine may require sourcing OEM or aftermarket parts, which can add up.
6. **Rust and Corrosion**
Many older Commandos suffer from rust, particularly in the frame, forks, and exhaust system. A thorough inspection is essential to assess the extent of corrosion before purchase. Rust can weaken structural components, compromising safety.
7. **Resale Value**
Classic motorcycles like the Commando can appreciate in value if well-maintained, but they are not a sound long-term investment. The market is niche, and resale depends heavily on condition, provenance, and demand.
8. **Legal and Registration Challenges**
- **Classic vs. Modern Registration**: In some regions, registering the bike as a classic (which offers benefits like lower taxes or insurance) requires meeting specific criteria (e.g., age, mileage, or condition).
- **Modifications**: Some modifications (e.g., exhaust changes, engine tuning) may require homologation or legal approval, depending on local laws.
9. **Limited Modern Technology Integration**
The Commando lacks modern conveniences such as:- **Electronic ignition** (early models use points or later have basic electronic ignition, which can be finicky).
- **Modern instrumentation** (speedometer, fuel gauge, or digital displays are often aftermarket).
- **Easily swappable batteries or self-starting** (some older models require kick-starting).
10. **Riding Characteristics**
- The bike is **heavy** (around 200-220 kg / 440-485 lbs), making it less nimble than modern sportbikes or naked bikes.
- The **drum brake** (rear) is less effective than discs, especially in wet conditions, reducing stopping power.
- The **upright riding position** can be tiring on long rides compared to modern ergonomics.
---
### **Conclusion**
Buying a Norton WM19-2.5 1971 Commando 750 (2003B with rear drum brake) is a decision that appeals to enthusiasts who value **heritage, mechanical simplicity, and the joy of riding a classic motorcycle**. It is an excellent choice if you:
- Enjoy **tinkering with mechanics** and are willing to invest time in maintenance.
- Appreciate **vintage design** and the **nostalgic riding experience**.
- Are prepared for **higher upfront costs** (due to potential repairs or restoration) but lower running costs long-term.
- Plan to **modify or restore** the bike rather than treat it as a daily commuter.
- Have access to **parts and mechanical support** (either through a local garage or the Norton community).
However, it is **not ideal** if you:- Seek **modern comfort, safety, or performance**.
- Want a **low-maintenance, plug-and-play motorcycle**.
- Prefer **fuel efficiency, high-speed stability, or advanced braking**.
- Are unwilling to **invest time and money** in restoring or maintaining the bike.
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### **Recommendation**
If you are **serious about owning a Norton Commando**, follow these steps to maximize your experience:1. **Thoroughly Inspect the Bike**
- Check for **rust** (especially in the frame, forks, and exhaust).
- Test the **engine** for smooth operation (listen for unusual noises, check for oil leaks).
- Inspect the **transmission** for smooth shifting and no play.
- Verify the **brakes** (drum brakes may need resurfacing or conversion to discs).
- Ensure the **electrical system** (ignition, lights, and charging) is functional.
2. **Get a Pre-Purchase Inspection (PPI)**
- Hire a **mechanic experienced with classics** to assess the bike s condition. This can save you from hidden issues.
3. **Budget for Restoration or Maintenance**
- Allocate funds for **immediate
Details:
I do combine shipping when possible limited by size, weight and fragile nature of item. If I miss something in the it is an honest mistake WOULD NEVER INTENTIONALLY MISREPRESENT PARTS - IT JUST ISN'T WORTH. Most packages are shipped USPS or UPS. SHIPPING: Shipping charges and quotes include postage handling are an estimate based on the item weight size using USPS or UPS rates.
Mach IV Motors Up for sale: Rear wheel and brake drum REMOVED FROM A 1971 Norton Commando Dunstall - good parts shape 2003 B.
part #: wm1925 prices
- $679.99-$779.99
specifications cyclevintagee:
- for models: 750, Roadster
- for years: 1971
- brand: Norton
- mpn: Wm19-2.5
- part type: Wheel Brake
- wheel width: 2.5
returns cyclevintagee:
- policy: Returns Accepted
- time: 30 Days
- paid by: Seller
general cyclevintagee:
- condition: Used
- Motorcycle Scooter Parts Accessories > Wheels, Tires Parts > Wheels Rims
shipping cyclevintagee:
- transit: 2-5 Days
- class: Standard
- cost: $55.00
- type: Fixed
- service: Standard
offer cyclevintagee:
- started: April 30, 2026
- sold: 0
- quantity: 1
- options: Ship-to-home
- best offers: True
- availability: In Stock
seller cyclevintagee:
- # reviews: 89685
- city: Appleton, Wisconsin
- rating: 100.0%
payments cyclevintagee:
- credit card: Visa
- wallet: Google-pay
- other
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