352-202647

ENGINE, Yamaha

fits: 1974 YAMAHA 250200 offers available: $46.88–$879.06
352-202647 YAMAHA Rd Engine 250352-202647 YAMAHA Rd Engine 250 #2352-202647 YAMAHA Rd Engine 250 #3

The Yamaha RD 250 engine, model number 352-202647, is a classic two-stroke powerhouse from the 1970s. This engine was originally installed in the Yamaha RD 250 motorcycle, a popular choice for enthusiasts and racers alike during its time.

The Yamaha 250cc engine is known for its power and reliability. It features a two-stroke, air-cooled, reed-valve engine design with a displacement of 249cc. The engine has a compression ratio of 10.0:1, which provides a good balance between power and fuel efficiency.

The engine is equipped with a five-speed transmission, allowing for smooth and precise shifting. The carburetor is a Mikuni VM20, which delivers a consistent fuel-air mix for optimal performance. The engine also has a dry sump oil system, which helps to reduce weight and improve handling.

The engine casing is made of lightweight aluminum, which helps to reduce the overall weight of the motorcycle. The cylinder head is a single-overhead-cam design, which allows for smooth and efficient operation. The engine also has a kickstart system, which provides a backup starting method in case of electrical failure.

The Yamaha 250cc engine is a true classic, known for its raw power and distinctive sound. It is a popular choice for restoration projects and custom builds, as well as for use in vintage racing events. Whether you're a seasoned rider or a newcomer to the world of classic motorcycles, the Yamaha RD 250 engine is a reliable and exciting choice.

Pros of buying Yamaha RD 250 (1974 model, engine number 352-250):

1. Historical Significance: The Yamaha RD 250 is a classic motorcycle with a rich history. It was popular in its time for its performance and reliability, and it continues to be sought after by collectors and enthusiasts.

2. Affordability: Compared to newer models or other classic bikes, the Yamaha RD 250 is relatively affordable. This makes it an attractive option for those looking to get into the classic motorcycle market without breaking the bank.

3. Parts Availability: Due to its popularity and long production run, parts for the Yamaha RD 250 are widely available. This makes repairs and maintenance easier and less expensive.

4. Simple Design: The RD 250 has a simple, air-cooled two-stroke engine. This can make it easier to work on and maintain compared to more complex, water-cooled engines.

5. Fun to Ride: The RD 250 is known for its handling and performance. It's a fun bike to ride, especially for those who enjoy the sound and feel of a two-stroke engine.

Cons of buying Yamaha RD 250 (1974 model, engine number 352-250):

1. Age and Wear: Like any used bike, the Yamaha RD 250 may have wear and tear from its age. This could include issues with the engine, tires, brakes, and other components.

2. Environmental Concerns: Two-stroke engines, like the one in the RD 250, are less environmentally friendly than four-stroke engines. They produce more emissions and require more frequent oil changes.

3. Less Powerful: Compared to modern bikes, the RD 250 is less powerful. This may be a disadvantage for those looking for a bike with more speed and acceleration.

4. No Modern Features: The RD 250 does not come with modern features like ABS, electronic ignition, or fuel injection. This may be a disadvantage for those who value safety and convenience.

Conclusion: The Yamaha RD 250 (1974 model, engine number 352-250) is a classic motorcycle with a lot to offer. It's affordable, easy to maintain, and fun to ride. However, it also has its drawbacks, such as its age and lack of modern features. If you're looking for a classic bike with a rich history and a simple design, the RD 250 could be a great choice. But if you're looking for a more powerful, modern bike, you may want to consider other options.

Recommendation: If you're interested in the Yamaha RD 250, I would recommend doing your research and finding a well-maintained example. Look for signs of wear and tear, and consider having the bike inspected by a mechanic before making a purchase. You may also want to consider joining a classic motorcycle forum or club, where you can connect with other owners and get advice and tips. Overall, the RD 250 can be a great addition to any classic motorcycle collection.

Details:

Don't know the history of engine, it is not seized and a stock bore. 1974 Yamaha rd250 engine bought with other spare parts, getting rid of some my extra inventory.

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