1. Antique, Vintage, Historic Motorcycle Parts For Sale
  2. sku: 21584089649808751
  3. LUCAS 42272A

LUCAS 42272A Magneto Matchless N1-4 554

fits model: G80, Ajs. make: Amc. year: 2018.

42272a Lucas Magneto N1-4 Ajs Matchless G80 Model 18 42272 Amc 554

( Brand: Lucas ), ( Manufacturer Part Number: 42272A ), ( Part Type: Magneto ), ( Vintage Part: Yes ), ( Country Of Origin: United Kingdom )

Review LUCAS Magneto N1-4 Matchless Model 42272 Amc 554 fits G80 AJS 2018

The **Lucas 42272A Magneto** is a meticulously engineered ignition component designed to deliver reliable and high-performance spark generation for classic motorcycle engines, particularly those built around the iconic **AJS Matchless G80 18** and **AMC 554** models. This precision-crafted magneto, identified by its part number **42272A**, is a direct replacement for the original N1-4 unit, ensuring seamless compatibility with engines that rely on this specific ignition system. Built to exacting standards, the magneto features a robust **permanent magnet rotor** housed within a sturdy, die-cast aluminum housing, which not only enhances durability but also minimizes weight for optimal engine balance. The internal design incorporates a **high-efficiency coil assembly** and a **precision-ground cam**, both of which work in unison to produce a strong, consistent spark even under demanding conditions. This makes it an ideal choice for enthusiasts seeking to restore or upgrade their vintage machines, whether for track use or cruising on the open road. The **42272A** is particularly well-suited for applications where reliability is paramount, such as in **match racing** or high-performance riding, where consistent ignition is critical for peak engine performance. Its compact yet robust construction ensures it fits snugly within the engine s original mounting points, requiring minimal modification to the existing setup. Whether you're reviving a classic bike for a weekend ride or preparing it for competitive racing, this magneto delivers the dependable spark needed to keep your engine running smoothly and efficiently. With its blend of heritage engineering and modern reliability, the Lucas 42272A Magneto stands as a testament to the enduring legacy of British motorcycle ignition technology.

### Pros and Cons of Buying a Lucas 42272A Magneto (N1-4 AJS Matchless G80/18/42272 AMC 554)

#### **Pros:**

1. **Compatibility and Fitment** This magneto is designed specifically for classic British motorcycles like the AJS Matchless G80, Triumph 18, and AMC 554, ensuring a direct replacement without major modifications. It is also widely used in other similar models, making it a versatile choice.

2. **Reliability and Durability** Lucas magnetos are known for their robust construction and long service life, especially when properly maintained. They are built to handle the demands of vintage engines, which often lack modern electronic ignition systems.

3. **Mechanical Ignition Advantage** Unlike electronic ignitions, mechanical magnetos are less prone to electrical interference, making them more reliable in older bikes with less refined electrical systems. They also do not require battery power, which can be unreliable in vintage machines.

4. **Easy Installation and Maintenance** These magnetos are relatively straightforward to install, especially for those familiar with motorcycle mechanics. They require basic maintenance, such as cleaning contacts and checking the flywheel magnets, which are simple tasks compared to modern electronic systems.

5. **Availability of Parts and Support** Lucas magnetos are still widely available through specialty motorcycle parts suppliers, and there is a wealth of knowledge available from vintage motorcycle forums and communities. This makes troubleshooting and repairs easier.

6. **Classic Bike Preservation** For enthusiasts who prioritize authenticity and mechanical simplicity, a Lucas magneto is a perfect fit. It preserves the original character of the bike while providing reliable ignition.

7. **Cost-Effective Long-Term Solution** While the initial cost may be higher than a cheap electronic ignition kit, a well-maintained Lucas magneto can last decades with minimal expense, making it a cost-effective solution in the long run.

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#### **Cons:**

1. **Higher Initial Cost** Compared to modern electronic ignition systems or aftermarket mechanical ignitions, a Lucas magneto can be more expensive, especially if purchasing a new or high-quality used unit.

2. **Sensitivity to Misalignment** The magneto relies on precise alignment between the flywheel magnets and the pickup coil. If the flywheel is warped or the magneto is not correctly positioned, it can lead to misfires or failure to fire at all. This requires careful installation and occasional re-alignment.

3. **Limited Adjustability** Unlike electronic systems, mechanical magnetos offer little to no adjustability for timing or dwell. If the engine s compression or carburetion changes, the ignition timing may need to be adjusted by modifying the flywheel or using a different magneto model, which can be inconvenient.

4. **Contact Wear and Maintenance** Traditional Lucas magnetos use contact points that wear out over time and require periodic cleaning or replacement. Neglecting this maintenance can lead to ignition failure or poor performance.

5. **Less Common in Modern Shops** While vintage motorcycle mechanics may be familiar with Lucas magnetos, many modern motorcycle repair shops may not have the expertise to diagnose or service them, which could complicate repairs.

6. **Potential for Electrical Issues** Although less prone to interference than electronic systems, Lucas magnetos can still suffer from issues like corroded terminals, faulty wiring, or weak flywheel magnets, which may require troubleshooting.

7. **Weight and Bulk** Compared to modern electronic ignitions, a Lucas magneto is heavier and bulkier. This may not be a significant issue for classic bikes, but it can be a minor drawback for those seeking a lighter solution.

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### **Conclusion:**

The Lucas 42272A magneto is an excellent choice for owners of classic British motorcycles like the AJS Matchless G80, Triumph 18, or AMC 554 who prioritize reliability, mechanical simplicity, and authenticity. Its robust construction and compatibility with vintage engines make it a trusted ignition solution for enthusiasts who appreciate the charm of older machinery. However, it does require careful installation, regular maintenance, and an understanding of its limitations, particularly regarding timing and contact wear.

For those who are willing to invest time in maintenance and prefer a proven, no-frills ignition system, the Lucas magneto is highly recommended. On the other hand, if you are looking for a more modern, adjustable, or low-maintenance solution, you may need to consider alternative ignition systems, though these may compromise the bike s classic feel.

### **Recommendation:**

If you own one of the compatible classic motorcycles and are comfortable with mechanical maintenance, **purchasing the Lucas 42272A magneto is a strong recommendation**. It offers reliability, authenticity, and a long service life, making it a worthwhile investment for preserving the spirit of your bike. Ensure you follow installation guidelines carefully, perform regular maintenance (such as cleaning or replacing contact points), and consult vintage motorcycle resources if you encounter issues. For those new to mechanical ignitions, it may be helpful to seek guidance from experienced classic bike mechanics to ensure proper setup.

Details:

Lucas mag info: N1-4, AMC 554, 42272A. Safely stored. Appears to be a for 1950s AJS matchless, G80 or model 18, likely others.

part #: 42272a price

  • $199.99

specifications cyclevintagee:

  • for models: G80, Ajs
  • for makes: Amc
  • for years: 2018
  • brand: Lucas
  • mpn: 42272a
  • part type: Magneto
  • vintage part: Yes
  • country of origin: United Kingdom

returns cyclevintagee:

  • paid by: Seller
  • policy: Returns Accepted
  • time: 30 Days

payments cyclevintagee:

  • other
  • wallet: Google-pay
  • credit card: Discover

seller cyclevintagee:

  • rating: 100.0%
  • city: Gladstone, Oregon
  • # reviews: 698

offer cyclevintagee:

  • sold: 0
  • started: April 5, 2026
  • quantity: 1
  • availability: In Stock
  • options: Ship-to-home

shipping cyclevintagee:

  • transit: 4-9 Days
  • type: Calculated
  • cost: $7.52
  • class: Standard
  • service: USPS Ground Advantage
  • carrier: USPS

general cyclevintagee:

  • condition: Used
  • Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories
for models: g80, ajs, for makes: amc, for years: 2018, part type: magneto, vintage part: yes, country of origin: united kingdom,
category: motorcycle parts > motorcycle scooter parts accessories, sku: 21584089649808751,
Lucas 42272A Is Similar To:
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1 offer $199.99 USD
  • Used. Offer #1 priced at $199.99 + $8.13 shipping estimate = $208.12* total. Safely stored. Lucas mag info: N1-4, AMC 554, .+$8.13 shipping

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