YAMAHA Cylinder Head B4X-11111-00-00

( Manufacturer Part Number: X-11111-00-00 ), ( Part Type: Cylinder Head )

Review YAMAHA Cylinder Head No Damage Low Hours fits YZ 125 2022–2026

The Yamaha YZ 125 motorcycle is a legend in the world of two-wheel racing, and its B4X-11111-00-00 cylinder head is a crucial component of this high-performance machine. This cylinder head is a key part of the bike's engine, responsible for the combustion process that powers the bike.

The B4X-11111-00-00 cylinder head is a sophisticated design, engineered to maximize power and efficiency while maintaining durability and reliability. The head features a large intake port for improved airflow and a large exhaust port for efficient gas expulsion. The combustion chamber is designed to optimize the air-fuel mixture for maximum power output.

The cylinder head also features four valves, each operated by a single overhead camshaft. This design allows for precise valve control, improving engine performance and reducing emissions. The valves are made of durable titanium material, ensuring they can withstand the rigors of high-performance racing.

The B4X-11111-00-00 cylinder head also incorporates a number of advanced features to enhance engine performance. These include a high-strength aluminum alloy construction, which reduces weight and improves heat dissipation, and a ceramic composite coating on the cylinder wall, which reduces friction and improves engine durability.

Additionally, the cylinder head is designed to be easily serviced and maintained. It features accessible spark plugs and a removable oil filter, making routine maintenance quick and efficient. The cylinder head also includes a number of sealing surfaces to ensure a tight seal and prevent leaks.

In summary, the Yamaha YZ 125 motorcycle's B4X-11111-00-00 cylinder head is a high-performance component designed to maximize power and efficiency while maintaining durability and reliability. Its advanced design features include a large intake and exhaust port, four valves operated by a single overhead camshaft, a high-strength aluminum alloy construction, and a ceramic composite coating on the cylinder wall. The cylinder head is also easily serviced and maintained, making it an essential component for any serious Yamaha YZ 125 racer.

The Yamaha YZ 125 is a popular motorcycle model known for its power, agility, and versatility. The cylinder head part number B4X-11111-00-00 is an essential component of the engine that can significantly impact the motorcycle's performance. Here are some pros and cons of buying this specific cylinder head:

1. High-performance design: This cylinder head is designed to deliver maximum power and torque to the engine. It features a high-compression combustion chamber, large intake and exhaust ports, and a high-strength material for improved durability.

2. OEM part: This cylinder head is an original equipment manufacturer (OEM) part, meaning it is manufactured by Yamaha and is specifically designed to fit the YZ 125 motorcycle. This ensures a perfect fit and optimal engine performance.

3. Long-lasting: The high-strength material used in the construction of this cylinder head makes it durable and long-lasting, reducing the need for frequent replacements.

1. Expensive: This OEM cylinder head is more expensive compared to aftermarket alternatives. However, the high-performance design and long-lasting quality may justify the cost for some riders.

2. Availability: Due to its high demand, this specific cylinder head may be difficult to find in some markets or regions, making it a challenge for riders to purchase and install it in a timely manner.

In conclusion, the Yamaha B4X-11111-00-00 cylinder head is a high-performance and long-lasting component that can significantly improve the power and torque of the YZ 125 motorcycle engine. However, its high cost and availability may be a concern for some riders.

If you are a serious racer or a performance enthusiast, the benefits of this OEM cylinder head may outweigh the costs. It can provide you with the power and performance edge you need to compete at a high level. On the other hand, if you are a casual rider or on a tight budget, you may consider exploring aftermarket alternatives to save some money. Ultimately, the decision depends on your individual needs and priorities.

Details:

Please view all pictures and verify fitment for your model. All parts stored in doors and are cleaned. View All Pics What you see is exactly what you'll receive. This Cylinder head will fit ALL 2022 2026 YZ 125 model's and possibly others please verify before purchasing.

419motoparts from RSUMOTO.

part #: x111110000 prices

• $187.99-$219.95

specifications cylindermotorcycleiz:

• for models: Yz, 125
• for makes: Yamaha
• for years: 2022-2026
• mpn: X-11111-00-00
• part type: Cylinder Head

offer cylindermotorcycleiz:

• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: November 14, 2025

payments cylindermotorcycleiz:

• wallet: Apple-pay
• credit card: Mastercard
• other

shipping cylindermotorcycleiz:

• cost: $0.00
• carrier: USPS
• type: Fixed
• class: Expedited
• transit: 4-8 Days
• service: USPS Priority Mail

returns cylindermotorcycleiz:

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

general cylindermotorcycleiz:

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

seller cylindermotorcycleiz:

• # reviews: 111
• city: Rochester, New York
• rating: 98.8%

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