YAMAHA 45646-7857 Engine Motor Block

( Manufacturer Part Number: 45646-7857 ), ( Type: Cylinder Head )

Review YAMAHA Engine Cases Motor Block Nice Used Condition fits R1 YZF 2015–2023

The Yamaha YZF R1 engine motor block, model number 45646-7857, is a crucial component of the high-performance YZF R1 motorcycle engine, first introduced in 2015 and continuing through 2023. This motor block is manufactured with advanced engineering and materials to ensure superior durability, power, and efficiency.

The motor block is a cast aluminum unit, featuring an intricate design that includes various cooling passages and oil galleries. These features facilitate efficient cooling and lubrication of the engine, allowing it to operate at peak performance even during the most demanding riding conditions. The casting process ensures a strong, uniform structure that can withstand the immense pressures generated by the engine.

The motor block is also designed with a wet sump oil system. This system utilizes an oil pan integrated into the motor block to hold the engine oil. The oil is pressurized by the engine's rotation, ensuring that it is continually supplied to the various moving parts within the engine. The wet sump system also allows for oil to be scavenged from the crankcase, minimizing oil consumption and ensuring consistent lubrication.

Additionally, the motor block houses the crankshaft, which is a vital component of the engine's power delivery system. The crankshaft is designed with a forged steel construction, ensuring the utmost strength and durability. It also features counterweights, which help to balance the reciprocating motion of the crankshaft, reducing vibration and ensuring smooth power delivery.

The cylinder bores within the motor block are designed to accept the pistons, which transfer the force generated by the combustion process to the crankshaft. The cylinder bores are precisely machined to ensure a perfect fit with the pistons, ensuring efficient transfer of power and minimizing friction.

The motor block also features a number of other essential components, including the main bearings and the camshaft bearings. These bearings are designed to minimize friction and wear, ensuring that the engine runs smoothly and efficiently.

In summary, the Yamaha YZF R1 engine motor block, model number 45646-7857, is a critical component of the high-performance YZF R1 motorcycle engine. Its advanced design, utilizing cast aluminum construction, cooling passages, oil galleries, and a wet sump oil system, ensures superior durability, power, and efficiency. The motor block's housing of the crankshaft, cylinder bores, and essential bearings further solidifies its role as the foundation of the engine.

Buying a Yamaha YZF R1 engine motor block, specifically the 2015-2023 model (model number: Yamaha 45646-7857), can be a significant investment for motorcycle enthusiasts or mechanics. Here are some potential pros and cons to consider before making a purchase.

1. High Performance: The Yamaha YZF R1 engine is known for its high-performance capabilities. A new motor block can ensure that the engine continues to perform optimally.

2. Durability: A new motor block can increase the lifespan of the engine, as it is the foundation of the engine and can be prone to wear and tear.

3. Improved Power: A new motor block can help improve the power output of the engine, making the motorcycle faster and more aggressive.

4. Better Fuel Efficiency: A well-maintained engine can lead to better fuel efficiency, which can save money in the long run.

5. Increased Resale Value: A well-maintained engine can increase the resale value of the motorcycle.

1. Cost: A new motor block can be expensive, especially for high-performance engines like the Yamaha YZF R1.

2. Time-Consuming: Installing a new motor block can be a time-consuming process, requiring specialized tools and expertise.

3. Risk of Damage: During the installation process, there is a risk of damaging other engine components, which can add to the cost.

4. Availability: Finding a new Yamaha YZF R1 motor block may not be easy, as they may not be readily available from dealers or suppliers.

Buying a new Yamaha YZF R1 engine motor block can be a worthwhile investment for motorcycle enthusiasts or mechanics who value high performance, durability, improved power, better fuel efficiency, and increased resale value. However, the high cost, time-consuming installation process, risk of damage, and availability may be deterrents for some. Ultimately, the decision to buy a new motor block depends on individual priorities, budget, and access to specialized tools and expertise.

If you are considering buying a new Yamaha YZF R1 engine motor block, it is recommended to do thorough research on the availability, cost, and installation process. It may also be helpful to consult with a trusted mechanic or dealership to assess the current condition of your engine and determine if a new motor block is necessary. Additionally, explore alternative options, such as rebuilding the existing motor block or replacing only the damaged components, to potentially save on cost.

Details:

Item condition and notes: Overall good used condition, no issues. Removed from a 2015 Yamaha R1 with 8824 miles. Ready to be installed. All threads, holes, bolts, journals, etc are in good used condition.

Please reach out with any questions and I will do my best to help.

part #: 456467857 prices

• $600.00-$959.20

specifications cylindermotorcycleiz:

• for models: R1, Yzf
• for makes: Yamaha
• for years: 2015-2023
• mpn: 45646-7857
• type: Cylinder Head

shipping cylindermotorcycleiz:

• class: Standard
• cost: $0.00
• transit: 5-12 Days
• type: Calculated
• service: USPS Ground Advantage
• carrier: USPS

returns cylindermotorcycleiz:

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

general cylindermotorcycleiz:

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

offer cylindermotorcycleiz:

• best offers: True
• started: January 10, 2026
• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock

payments cylindermotorcycleiz:

• credit card: Visa
• other
• wallet: Google-pay

seller cylindermotorcycleiz:

• rating: 99.1%
• # reviews: 272
• city: Denton, Nebraska

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