YAMAHA 1M2-11311-00-00 Cylinder Head 1M2-11111-00-00

( Manufacturer Part Number: 1M2-11311-00-00 ), ( Machine Type: Dual Sport Motorcycle ), ( Items Included: Bolts, Gasket ), ( Material: Aluminum ), ( Vintage Part: Yes ), ( Engine Type: 2-stroke ), ( Type: Cylinder And Head Assy ), ( Part By Region: Japan ), ( Manufacturer Warranty: No ), ( Finish: Metal/plastic/fbglas ), ( Part Type: Antique, Vintage, Historic )

Review YAMAHA Stock Cylinder And Head #1m2-11311-00-00 fits DT400 1977-78

Yamaha DT400 Cylinder Head (1M2-11311-00-00, 1977-78)

The Yamaha DT400 Cylinder Head (Part Number: 1M2-11311-00-00) is a critical component for the two-stroke, single-cylinder engine of the 1977-78 Yamaha DT400 motorcycle. This cylinder head is designed to ensure efficient combustion and optimal engine performance.

The cylinder head features a compact design with a hemispherical combustion chamber. The hemispherical shape of the combustion chamber enhances the fuel-air mixture's compression ratio, leading to better combustion efficiency, increased power output, and improved fuel economy.

The cylinder head includes an integrated exhaust port design. The exhaust ports are strategically located to facilitate the quickest and most efficient exhaust gas flow, reducing backpressure and maximizing engine performance.

Additionally, the cylinder head comes equipped with adjustable exhaust valves. These valves allow the rider to fine-tune the engine's performance by adjusting the exhaust valve clearance. This adjustment can be beneficial for riders who use their motorcycle in various conditions, such as different altitudes or temperature extremes.

The cylinder head also includes a pair of intake ports for the fuel-air mixture. These intake ports are designed to optimize airflow into the engine, ensuring a consistent fuel-air mixture for efficient combustion.

The Yamaha DT400 Cylinder Head (1M2-11311-00-00) is a high-quality, durable component, engineered to deliver reliable performance. It is manufactured to strict specifications to ensure a perfect fit and function in the 1977-78 Yamaha DT400 motorcycle.

If you're in the market for a replacement cylinder head for your Yamaha DT400, the 1M2-11311-00-00 is a solid choice that will help keep your motorcycle running at its best.

Buying a Yamaha DT400 Cylinder Head (1m2-11311-00-00 and 1m2-11111-00-00) - Pros, Cons, and Conclusion

The Yamaha DT400 is a classic motorcycle known for its durability and performance. If you're considering purchasing the cylinder heads (1m2-11311-00-00 for the earlier models, and 1m2-11111-00-00 for the later ones) for this motorcycle, here are some potential pros and cons to consider.

1. Availability: These cylinder heads are readily available from various sources, making it easier for enthusiasts to find and purchase them.

2. Cost-effective: Replacing a cylinder head instead of the entire engine can save you a significant amount of money.

3. Performance: A rebuilt or new cylinder head can improve the overall performance of the DT400 engine.

4. Customizability: If you're looking to modify your DT400, a new cylinder head can offer the opportunity to upgrade the engine's power output.

1. Installation complexity: Installing a new cylinder head can be a complex process that requires specialized tools and knowledge.

2. Cost: While the cost of the cylinder head itself may be lower than that of a new engine, the labor and additional parts required for installation can add up.

3. Risk of engine damage: If not installed correctly, there's a risk of damaging other engine components during the cylinder head installation process.

4. Potential for compatibility issues: Ensure that the cylinder head you purchase is compatible with your specific Yamaha DT400 model and year.

When considering purchasing a Yamaha DT400 cylinder head (1m2-11311-00-00 or 1m2-11111-00-00), it's important to weigh the potential benefits against the challenges. If you have the necessary skills, tools, and budget, replacing the cylinder head can be a cost-effective and performance-enhancing solution for your DT400. However, if you're not confident in your abilities or resources, it might be wiser to seek professional help or consider alternative options.

If you decide to proceed with purchasing and installing a new cylinder head for your Yamaha DT400, ensure that you thoroughly research the process, gather the necessary tools and knowledge, and consider seeking help from a professional if needed. Additionally, double-check the compatibility of the cylinder head with your specific motorcycle model and year to avoid potential issues.

Details:

Please e-mail with questions. You don't see this everyday. Has a 85mm STD bore. Cylinder has no gouges or scratches, looks nice.

Sorry, no zero buyers. Comes with the stock std piston as pictured, no scoring on at all, brown film is old oil. # 1M2-11311-00-00 1M2-11111-00- ALSO COMES WITH PISTON AND RINGS. This came off of a 1977DT400 FROM 15 YRS AGO, FOUND BACK IN SERVICE.

Look at the head dome, was burning perfect. Bore looks in good condition, no solid grooves. You know you've found a deal where saving money comes easily. FOR ONLY 99.95.

part #: 1m2113110000 prices

• $35.00-$94.95

specifications cylindermotorcycleiz:

• for models: Dt400
• for makes: Yamaha
• for years: 1977-78
• mpn: 1m2-11311-00-00
• machine type: Dual Sport Motorcycle
• items included: Bolts, Gasket
• material: Aluminum
• vintage part: Yes
• engine type: 2-stroke
• type: Cylinder And Head Assy
• part by region: Japan
• manufacturer warranty: No
• finish: Metal/plastic/fbglas
• part type: Antique, Vintage, Historic

payments cylindermotorcycleiz:

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

seller cylindermotorcycleiz:

• # reviews: 7451
• rating: 98.4%
• city: Appleton, Wisconsin

returns cylindermotorcycleiz:

• policy: No Returns

offer cylindermotorcycleiz:

• quantity: 1
• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: February 18, 2026

shipping cylindermotorcycleiz:

• class: Economy
• cost: $23.95
• service: Economy
• transit: 3-7 Days
• type: Fixed

general cylindermotorcycleiz:

• condition: Used
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads

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