fits model: Cr250m. make: Honda. year: 1973–1976.

( Manufacturer Part Number: 13104-395-000 ), ( Part Type: Piston ), ( Country/region Of Manufacture: Japan ), ( Manufacturer Warranty: Unspecified Length ), ( Storage Location: K10 Taylor-n A75 )
The Honda 13104-395-000 piston is a genuine OEM (Original Equiptment Manufacturer) replacement part designed specifically for the CR250M Elsinore motorcycles manufactured between 1973 and 1976. This piston is precisely engineered to deliver optimal performance and reliability, ensuring a perfect fit and functional compatibility with your classic Honda machine.
This piston is designed with a diameter of 3.16 inches and a stroke of 3.12 inches, making it ideal for use in the CR250M's SOHC (Single Overhead Camshaft) air-cooled engine. It is compatible with the third generation crankshaft, and its compression height measures 2.34 inches with a compression ring gap of 0.020 inches.
The piston's combustion chamber shape provides excellent engine efficiency and power output, while the compression ratio is designed to enhance the performance and responsiveness of the motorcycle. This piston is also engineered with a ring groove for an oil control ring to minimize oil consumption and engine wear.
The top of the piston features a significant skirt that helps reduce the piston's lateral vibration and noise while in operation, enhancing the overall riding experience. The piston's ring lands are also precision-machined to ensure compatibility with the piston rings and guarantee a proper seal.
Honda's commitment to quality is evident in this piston's construction. It undergoes stringent testing and inspection processes to ensure it meets the highest standards of durability and reliability for motorcycle enthusiasts seeking authentic OEM components. By installing the Honda 13104-395-000 piston, you'll be restoring the performance and reliability of your 1973-1976 CR250M Elsinore motorcycle.
The Honda CR250M Elsinore piston part number 13104-395-000 is a 0.75mm oversized piston designed for use in Honda CR250M motorcycles manufactured between 1973 and 1976. Replacing the stock piston with an oversized one like this one can offer various advantages and disadvantages. Let's discuss them in detail.
Advantages:1. Increased engine performance: An oversized piston allows for a larger combustion chamber displacement, potentially resulting in increased engine power and torque.
2. Enhanced durability: Oversized pistons can be more robust due to their thicker piston crown and skirt, which can withstand higher compression and reduces the chances of piston failure.
3. Improved thermal efficiency: The larger combustion chamber volume facilitates better heat distribution and reduced potential for hot spots.
Disadvantages:1. Higher cost: Aftermarket oversized pistons tend to be more expensive than the stock replacement pistons.
2. Complex installation process: Oversized piston installations can be challenging due to the need for specific ring sets and cylinder honing, which may require professional assistance to ensure a proper fit and sealing.
3. Potential engine detuning: The oversized piston might necessitate re-jetting the carburetor and adjusting the ignition timing to maintain a smooth and efficient engine operation.
4. Increased crankshaft endplay: The installation of an oversized piston may result in increased crankshaft endplay, which might lead to loss of power and reduction in engine performance.
In conclusion, an oversized piston (part number 13104-395-000) can offer significant power gains, durability improvements, and thermal efficiency enhancements for your Honda CR250M Elsinore motorcycle (1973 1976). However, it comes with a higher cost, complex installation, potential engine detuning, and crankshaft endplay considerations. Ultimately, if you're willing to invest in the aftermarket upgrade and the time and resources needed for installation and tuning, an oversized piston may provide excellent benefits for your motorcycle. If you're not comfortable with the complexities and potential issues mentioned above, a stock replacement piston might be a more suitable option.
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