1. Motorcycle & Scooter Oil Filters Deals
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  3. ROYAL ENFIELD BS3-223

ROYAL ENFIELD BS3-223 Bullet Unit Engine 350CC

fits year: 1966.

Bs3-223 Royal Enfield 1966 350cc Inch New Bullet Unit Engine -v Rare- V Near Complete- Good

( Brand: Royal Enfield ), ( Manufacturer Part Number: BS3-223 ), ( Type: 350cc Engine ), ( Machine Type: Street Motorcycle ), ( Country/region Of Manufacture: United Kingdom ), ( Vintage Part: Yes )

Review ROYAL ENFIELD 350cc Inch New Bullet Unit Engine Rare Near Complete Good fits 1966

The Royal Enfield BS3-223 1966 350cc Bullet Unit Engine is a classic and iconic piece of motorcycling history. This engine, produced in the year 1966, is a part of the Bullet series, which has been in production since 1955 and is renowned for its durability, reliability, and distinctive character.

The BS3-223 engine is a single-cylinder, air-cooled unit, with a displacement of 346cc. It features a 5-speed gearbox and a wet multi-plate clutch. The engine boasts a bore and stroke of 70mm x 90mm, with a compression ratio of 8:1. The engine delivers a maximum power output of 19.8 bhp at 5400 rpm and a maximum torque of 24.8 Nm at 4000 rpm.

The engine comes with a number of features that enhance its performance and durability. It has a twin-spark ignition system, which ensures efficient combustion and improved fuel economy. The engine also comes with a float-feed carburetor, which ensures smooth and consistent fuel delivery to the engine.

The BS3-223 engine meets the BS3 emission norms and comes equipped with a number of emission control features, including a catalytic converter and an exhaust gas recirculation system. These features help reduce harmful exhaust emissions and make the engine more eco-friendly.

The engine also features a robust and sturdy construction, with a cast iron cylinder and a cast aluminum head. The engine's crankshaft, piston, and connecting rod are all made of high-quality materials, ensuring that the engine can withstand the rigors of regular use.

The BS3-223 engine is a popular choice among classic motorcycle enthusiasts and collectors, who appreciate its unique character, reliability, and rich history. It is a true workhorse, capable of delivering consistent performance, even in harsh operating conditions. Whether you are restoring an old Royal Enfield Bullet or building a custom motorcycle, the BS3-223 engine is an excellent choice for those who value classic design, durability, and performance.

The Royal Enfield BS3-223 1966 350cc Bullet unit engine is a classic motorcycle engine with a rich history. Here are some pros and cons to help you make an informed decision about purchasing this engine:

Pros:

1. Classic Appeal: The Bullet engine is known for its classic look and unique sound. It is a favorite among motorcycle enthusiasts and collectors.

2. Reliability: This engine has been in production since 1955, and many owners report that with proper maintenance, it can last for decades.

3. Affordability: Compared to newer engines, the Bullet engine is relatively affordable, making it a popular choice for those on a budget.

4. Easy to Work On: The simple design of the Bullet engine makes it easy to work on, making it a good choice for those who enjoy tinkering with their machines.

Cons:

1. Fuel Efficiency: The Bullet engine is not very fuel-efficient, which can be a drawback for those who ride frequently or long distances.

2. Power: This engine produces relatively low power compared to newer engines, which can be a disadvantage for those who want a more powerful riding experience.

3. Emissions: The BS3-223 engine is designed to meet the latest emissions standards, but it may still produce more emissions than newer engines, which could be a concern for those who are environmentally conscious.

4. Availability of Spare Parts: While the Bullet engine is common, some spare parts may be difficult to find, which could make repairs more challenging and expensive.

Conclusion:

The Royal Enfield BS3-223 1966 350cc Bullet unit engine is a classic motorcycle engine with a rich history and a devoted following. It offers a unique riding experience, reliability, and affordability. However, it also comes with some drawbacks, such as low fuel efficiency, low power, and potential availability issues with spare parts.

If you are a motorcycle enthusiast or collector, the Bullet engine may be an excellent addition to your collection. However, if you prioritize fuel efficiency, power, or ease of maintenance, you may want to consider other options. Ultimately, the decision to purchase this engine depends on your personal preferences, budget, and riding style.

Recommendation:

If you are considering purchasing the Royal Enfield BS3-223 1966 350cc Bullet unit engine, I would recommend doing thorough research on its specifications, maintenance requirements, and availability of spare parts. You may also want to consider test-riding the motorcycle with this engine to ensure that it meets your expectations and fits well with your riding style.

Additionally, I would recommend purchasing the engine from a reputable dealer or seller to ensure that it is in good condition and comes with any necessary paperwork or guarantees. Proper maintenance and regular servicing are also essential to keep the engine running smoothly and efficiently.

Details:

Clever design - many interesting features. Careful packing always. Also have a 250 Crusader and Continental engines - ask. May have some.

Original rare Royal Enfield 350cc New Bullet - 1966 #BS3 223. Good condition: very close to complete and crank turns - see photos. One of maybe 290 produced and am told less than a dozen imported into USA. Any and all questions answered promptly.

Long stroke version of the Crusader/GT Continental but with strengthened cases - 4 speed. Some fasteners and small parts missing. Appreciate your interest.

part #: bs3223 prices

  • $26.96-$1329.05

specifications filtertake:

  • for years: 1966
  • brand: Royal Enfield
  • mpn: Bs3-223
  • type: 350cc Engine
  • machine type: Street Motorcycle
  • country/region of manufacture: United Kingdom
  • vintage part: Yes

general filtertake:

  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Oil Filters
  • condition: Used

shipping filtertake:

  • carrier: UPS
  • cost: $287.88
  • transit: 4-8 Days
  • class: Standard
  • type: Calculated
  • service: UPS Ground

returns filtertake:

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

payments filtertake:

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

seller filtertake:

  • city: Santa Paula, California
  • rating: 100.0%
  • # reviews: 4823

offer filtertake:

  • quantity: 1
  • options: Ship-to-home
  • availability: In Stock
  • started: July 18, 2025
  • sold: 0
for years: 1966, type: 350cc engine, machine type: street motorcycle, country/region of manufacture: united kingdom, vintage part: yes,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > oil filters, sku: 5352221592320752,

Royal Enfield BS3-223 Is Similar To:

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5 offers $26.96–$1329.05 USD
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