1. Antique, Vintage, Historic Motorcycle Parts For Sale
  2. sku: 17102561540842751
  3. AJS 51/G80S

AJS 51-G80S Matchless Engine 51/G80S 1007C

fits year: 1951.

1007c Ajs 51/g80s Original 1951 Matchless G80 Competition Engine Case

( Brand: Ajs ), ( Manufacturer Part Number: 51/G80S ), ( Part Type: Engine Case ), ( Vintage Part: Yes )

Review AJS Original Matchless Competition Engine Case fits G80 1951

AJS 51/G80S 1951 Matchless G80 1007C Engine: A Timeless Piece of Motorcycling History

Step back in time with the AJS 51/G80S 1951 Matchless G80 1007C engine, a remarkable artifact that encapsulates the spirit and engineering prowess of motorcycling's golden era. This engine is a testament to the unparalleled craftsmanship and innovative design that defined the motorcycling industry in the mid-20th century.

The AJS 51/G80S engine, also known as the Matchless G80 1007C, is a single-cylinder, four-stroke engine with an overhead valve (OHV) design. With a displacement of 1007cc, this engine delivers a robust and smooth power output, making it a favorite among collectors and enthusiasts alike.

The engine block is made of high-quality cast iron, a material chosen for its durability and heat resistance. The cylinder head features a single camshaft operating the inlet and exhaust valves, ensuring efficient combustion and power delivery. The engine is also equipped with a dry sump lubrication system, which helps to reduce weight and improve performance.

The AJS 51/G80S engine is a work of art, with its polished engine components and gleaming chrome details. Each engine is meticulously crafted, reflecting the high standards of quality and attention to detail that were synonymous with AJS and Matchless during this period.

Whether you're restoring a classic motorcycle or building a custom bike, the AJS 51/G80S 1951 Matchless G80 1007C engine is an exceptional addition to any collection. With its rich history, timeless design, and powerful performance, this engine is more than just a mechanical component it's a piece of motorcycling history that continues to captivate and inspire.

The AJS 51/G80s 1951 Matchless G80 1007C engine is a classic motorcycle engine with unique charm and historical significance. Here are some pros and cons to consider when deciding whether to purchase this engine:

Pros:

1. Unique and Rare: The AJS 51/G80s engine is a classic and rare motorcycle engine. Owning one gives you the opportunity to own a piece of motorcycle history.

2. High-Quality Construction: These engines were built to last, with high-quality materials and careful construction. If well-maintained, they can provide many years of reliable service.

3. Community Support: There is a large community of enthusiasts who are knowledgeable about these engines. This can provide valuable resources and support for maintenance, restoration, and customization.

4. Performance: These engines offer excellent performance, with a smooth ride and strong power output.

Cons:

1. Limited Availability: Due to their age, finding replacement parts for these engines can be difficult and expensive.

2. High Maintenance: Older engines require more maintenance than modern engines. Regular servicing is necessary to keep them running smoothly.

3. Complexity: The AJS 51/G80s engine is a complex piece of machinery. This can make it challenging for inexperienced mechanics to work on.

4. Value: Given their age and maintenance requirements, the value of these engines may not increase significantly over time.

Conclusion:

The AJS 51/G80s 1951 Matchless G80 1007C engine is an attractive option for classic motorcycle enthusiasts who are experienced with engine maintenance and are willing to invest the time and resources required to keep these engines running smoothly. For those who are new to motorcycles or prefer a more modern, low-maintenance engine, other options may be more suitable.

Recommendation:

If you are an experienced motorcycle enthusiast who appreciates classic engines and is willing to invest the time and resources required to maintain and restore the AJS 51/G80s engine, then it could be a worthwhile investment. However, it's important to carefully research the engine's condition and history before making a purchase, and to budget for any necessary repairs or maintenance.

Details:

Original AJS matchless case, see all pictures for condition and assessment.

part #: 51g80s prices

  • $20.39-$80.07

specifications cyclevintagee:

  • for years: 1951
  • brand: Ajs
  • mpn: 51/g80s
  • part type: Engine Case
  • vintage part: Yes

seller cyclevintagee:

  • city: Gladstone, Oregon
  • # reviews: 573
  • rating: 100.0%

payments cyclevintagee:

  • wallet: Google-pay
  • credit card: Diners-club
  • other

returns cyclevintagee:

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

general cyclevintagee:

  • Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories
  • condition: Used

shipping cyclevintagee:

  • service: USPS Ground Advantage
  • carrier: USPS
  • transit: 5-10 Days
  • type: Calculated
  • class: Standard
  • cost: $12.04

offer cyclevintagee:

  • started: August 16, 2025
  • availability: In Stock
  • sold: 0
  • quantity: 1
  • options: Ship-to-home
for years: 1951, part type: engine case, vintage part: yes,
category: motorcycle parts > motorcycle scooter parts accessories, sku: 17102561540842751,
Ajs 51-G80S Is Similar To:
cyclevintagee logo
5 offers $20.39–$80.07 USD
  • New. Offer #1 priced at $47.64 + $17.52 shipping estimate = $65.16* total. As you can see every gasket/seal imaginable is included and perfect for a complete engine rebuild! All top quality and used by ourselves on rebuilds completed in house! AJS / MATCHLESS full engine gasket set.+$17.52 shipping
  • New. Offer #2 priced at $20.39 + $0.00 shipping estimate = $20.39* total. PART NUMBERNA. SUITABLE FORAJS 350cc 500cc Matchless 350 cc 500cc 1949 - 61.FREE SHIPPING
  • New. Offer #3 priced at $80.07 + $0.00 shipping estimate = $80.07* total. So better communicate for faster resolution to any disputes.FREE SHIPPING
  • Used. Offer #4 priced at $31.45 + $7.50 shipping estimate = $38.95* total. MAY ALSO FIT. MATCHLESS G80.+$7.50 shipping
  • Used. Offer #5 priced at $20.43 + $21.13 shipping estimate = $41.56* total. used worn & weathered but complete intact & still very usable. Norton ES2 & Model 50.+$21.13 shipping

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