What is the engine displacement of the 1974 AJS Stormer Y4 250 Mk 2?

The 1974 AJS Stormer Y4 250 Mk 2 has an engine displacement of 247.00 ccm (15.07 cubic inches).

How much horsepower does the 1974 AJS Stormer Y4 250 Mk 2 have?

The 1974 AJS Stormer Y4 250 Mk 2 produces 25.00 HP (18.2 kW)) @ 7000 RPM of power.

How much does the 1974 AJS Stormer Y4 250 Mk 2 weigh?

The 1974 AJS Stormer Y4 250 Mk 2 has a dry weight of 104.3 kg (230.0 pounds).

What is the seat height of the 1974 AJS Stormer Y4 250 Mk 2?

The 1974 AJS Stormer Y4 250 Mk 2 has a seat height of 762 mm (30.0 inches) If adjustable, lowest setting..

1974 AJS Stormer Y4 250 Mk 2 Price, Specs, Review

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Review

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The AJS Stormer Y4 250 Mk 2, released in 1974, represents a significant chapter in the brand's off-road racing heritage. Building upon the success of its predecessors, the Mk 2 aimed to refine its capabilities in the competitive world of motocross and enduro. In its era, it faced stiff competition from other European and Japanese manufacturers, notably squaring off against models like the CZ 250 and the early Yamaha YZ250s, all vying for dominance on the dirt tracks.

Underneath its purposeful styling, the Stormer Y4 250 Mk 2 housed a 247.00 ccm (15.07 cubic inches) single-cylinder engine. This powerplant was rated at 25.00 HP (18.2 kW) delivered at a peak of 7000 RPM, providing ample thrust for its intended purpose. Weighing in at a svelte 104.3 kg (230.0 pounds), the power-to-weight ratio was favorable for quick acceleration and nimble handling over rough terrain. Fuel capacity stood at 7.57 litres (2.00 gallons), offering a reasonable range for races or trail rides. As a Vintage category motorcycle, its specifications reflect the engineering priorities of the mid-1970s.

Riding characteristics of the Stormer Y4 250 Mk 2 were undoubtedly geared towards off-road performance. Its lightweight construction and powerful engine made it responsive to rider inputs, crucial for navigating challenging courses. The seat height, at a low 762 mm (30.0 inches) (if adjustable, lowest setting), allowed riders to easily dab a foot down in tricky situations, enhancing control. The chassis and suspension were designed to absorb the impacts of jumps and bumps, providing a rugged, albeit firm, ride experience. This was a machine built for aggressive riding and tackling demanding terrain, prioritizing function over long-distance comfort.

The AJS Stormer Y4 250 Mk 2 was primarily aimed at amateur and semi-professional motocross racers, as well as serious off-road enthusiasts who appreciated a dedicated competition machine. Its robust build and focused performance made it a compelling choice for those seeking to conquer dirt tracks and trails. Today, it appeals to collectors and vintage racing aficionados who value its historical significance and raw, unadulterated off-road character.

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Pros (Advantages)

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✅ Why buy this bike?

The AJS Stormer Y4 250 Mk 2 1974 is known for its reliable 246cc two-stroke engine, delivering a good balance of power and efficiency.
The bike features a lightweight frame and agile handling, making it suitable for both off-road and on-road riding.
The suspension system of the AJS Stormer Y4 250 Mk 2 1974 provides a smooth and comfortable ride, even on rough terrain.
The design of the motorcycle is classic and timeless, appealing to vintage motorcycle enthusiasts.
The AJS Stormer Y4 250 Mk 2 1974 has a reputation for being durable and easy to maintain, ensuring long-lasting performance for its riders.

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Cons (Disadvantages)

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⚠️ Things to consider

Limited availability of spare parts due to the age of the motorcycle.
Reliability issues with the engine and electrical components.
Lack of modern features such as ABS or fuel injection.
Difficulty in finding qualified mechanics familiar with vintage models.
Lower resale value compared to more popular and newer motorcycles.

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Alternatives

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⚖️ Comparison & Competition

Yamaha DT250
The Yamaha DT250 is a reliable and versatile off-road motorcycle known for its durability and performance. It features a lightweight design and a powerful two-stroke engine, making it a popular choice for riders looking for a capable trail bike.
Suzuki TS250
The Suzuki TS250 is a legendary dual-sport motorcycle that offers a perfect balance between on-road comfort and off-road capability. With a strong engine and sturdy frame, the TS250 is a great choice for riders seeking adventure both on and off the pavement.
Honda XL250
The Honda XL250 is a classic enduro motorcycle that has stood the test of time. Renowned for its smooth power delivery and excellent handling, the XL250 is a reliable companion for riders looking to explore various terrains with confidence.
Kawasaki F11 250
The Kawasaki F11 250 is a vintage motocross bike that delivers a thrilling riding experience. With its nimble handling and potent engine, the F11 250 is a favorite among riders who appreciate the raw power and agility of a classic dirt bike.
Bultaco Sherpa T 250
The Bultaco Sherpa T 250 is a legendary trials motorcycle known for its exceptional performance and agility. With its lightweight construction and responsive handling, the Sherpa T 250 is a top choice for riders who enjoy tackling technical off-road obstacles with ease

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License Class (EU)

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The AJS Stormer Y4 250 Mk 2 produces 25 HP, fitting A2 license limits (max 35 kW / 47 HP). For riders 18+.

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Fuel Economy & Running Costs

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Estimated average for 247cc class: 55-80 mpg (3.0-4.5 L/100km)

⛽ Tank: 7.57 litres (2.00 gallons)

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Insurance Class

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Insurance grouping for AJS Stormer Y4 250 Mk 2 (247cc):

📋 Group 8-15 — mid-range

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Insurance Calculator (UK est.)

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Personalised premium estimate for the AJS Stormer Y4 250 Mk 2 (UK rates):

💡 Estimate based on UK market averages. For real quotes, compare on Compare the Market, MoneySuperMarket, GoCompare.

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Price

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$1149 USD

MSRP / listing

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Buy New & Used

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Find new and used AJS Stormer Y4 250 Mk 2 1974 listings:

🛒 eBay Motors 🏍️ Cycle Trader 🇬🇧 Auto Trader UK 🔍 Google Listings

💡 Third-party listings. MotoBike Info is informational only.

👤 Final premium varies by rider age, history, location.

AJS Stormer Y4 250 Mk 2

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