HONDA 12100-KA4-000 Top Engine Motor Cylinder Jug End 66MM

( Manufacturer Part Number: 12100-KA4-000 ), ( Type: Cylinder Jug )

Review HONDA Oem Engine Motor Cylinder Bore Jug 66mm Top End fits CR250R 1981

The Honda 12100-ka4-000 is a motorcycle engine cylinder jug specifically designed for the CR250R model produced by Honda in 1981. This engine component is an essential part of the two-stroke, single-cylinder powerplant that gave the CR250R its legendary status in the motocross world.

The cylinder jug, also known as the cylinder barrel or simply the barrel, is the part of the engine that houses the piston and forms the combustion chamber. In the case of the Honda CR250R's 66mm top end, the cylinder jug is responsible for accommodating the large-bore size that contributed to the bike's impressive power output.

The Honda 12100-ka4-000 cylinder jug is made of high-quality aluminum alloy, ensuring both durability and lightweight construction. The exterior of the jug features a polished finish that not only looks great but also helps to reduce friction between moving parts for optimal engine performance.

The cylinder jug comes with a factory-installed, high-performance porting design. This means that the shape and size of the intake and exhaust ports have been optimized to maximize the flow of air and fuel into the engine, as well as the efficient expulsion of exhaust gases.

Additionally, the Honda 12100-ka4-000 cylinder jug includes a factory-installed, high-compression piston. This piston design raises the engine's compression ratio, allowing for more efficient combustion and increased power output a characteristic feature of the CR250R's high-performance engine.

The cylinder jug's top end design also includes a factory-installed, high-performance reed valve system. This design allows for efficient intake and exhaust flow, providing optimal power and responsiveness across the entire RPM range.

In summary, the Honda 12100-ka4-000 cylinder jug is a critical component of the legendary CR250R engine. Its high-quality construction, optimized porting design, high-compression piston, and factory-installed reed valve system all contribute to the engine's impressive power output and performance. If you're looking to rebuild or restore your 1981 Honda CR250R, this cylinder jug is an essential upgrade for any enthusiast or racer.

The Honda CR250R 1981 66mm top end, specifically the cylinder jug (part number 12100-ka4-000), is a popular choice among vintage motocross enthusiasts due to its high performance and iconic status in the motocross community. Here are some pros and cons of buying this engine component:

1. High Performance: The 1981 CR250R engine was renowned for its powerful and efficient performance. Installing a genuine Honda top end can help restore the bike to its original specifications and deliver a thrilling riding experience.

2. Authenticity and Collectibility: The Honda CR250R was a legendary bike in its time and continues to be a sought-after collectible among enthusiasts. A genuine Honda top end can add value to your vintage bike and potentially increase its resale value.

3. Durability: Honda engines are known for their durability and reliability. Installing a genuine Honda top end ensures that you are getting a high-quality part that will last longer than aftermarket alternatives.

1. Cost: Genuine Honda parts, especially for vintage models, can be more expensive than aftermarket alternatives. The cost of the top end may be a significant investment for some.

2. Availability: Finding a genuine Honda 1981 CR250R top end in good condition can be a challenge, as these parts are no longer in production. You may need to search extensively or pay a premium price for a used part.

3. Installation Complexity: Installing a top end on a motorcycle engine can be a complex and time-consuming process. It may require specialized tools and knowledge to ensure that the installation is done correctly.

The decision to buy a Honda 1981 CR250R 66mm top end depends on your personal priorities and goals. If you value authenticity, performance, and durability, then a genuine Honda top end may be worth the investment. However, if cost and availability are concerns, then considering an aftermarket alternative or rebuilding the existing top end may be a more practical option. Ultimately, it's important to weigh the pros and cons and make an informed decision based on your specific circumstances.

If you have the means and the passion for vintage motocross, then investing in a genuine Honda 1981 CR250R top end can be a rewarding experience. Make sure to source the part from a reputable dealer or seller to ensure authenticity and quality. If the cost is a concern, consider exploring financing options or saving up over time. Additionally, be prepared for the installation process and consider seeking the help of a professional mechanic to ensure a successful and safe installation.

Details:

Has some light surface corrosion and normal wear. 1981 HONDA CR250R OEM ENGINE MOTOR CYLINDER BORE JUG 66MM TOP END 12100-KA4-0 This cylinder jug is in very good condition and shows normal signs of wear. 66MM standard bore. All sealing surfaces and bolt holes are in good shape.

Bore looks to be in good running shape, but may need one size overbore perfect. Sleeve is in pretty good shape with no deep scoring or cracks. Removed From: 1981 Honda CR250R, Please review all pictures to assess the condition of item. Nothing too excessive.

Overall nice solid cylinder.

part #: 12100ka4000 prices

• $99.99-$479.99

specifications cylindermotorcycleiz:

• for models: Cr250r
• for makes: Honda
• for years: 1981
• mpn: 12100-ka4-000
• type: Cylinder Jug

payments cylindermotorcycleiz:

• wallet: Paypal
• credit card: Discover
• other

seller cylindermotorcycleiz:

• rating: 99.7%
• city: Boylston, Massachusetts
• # reviews: 350

general cylindermotorcycleiz:

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

offer cylindermotorcycleiz:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: February 11, 2025
• quantity: 1

returns cylindermotorcycleiz:

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

shipping cylindermotorcycleiz:

• transit: 3-8 Days
• service: UPS Ground
• cost: $0.00
• class: Standard
• carrier: UPS
• type: Fixed

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