fits make: Harley.

( Brand: Je ), ( Manufacturer Part Number: 102M ), ( Engine Type: 4-stroke ), ( Type: Piston ), ( Items Included: Pair Pistons, Rings, Pins, Clips ), ( Piston Diameter: 4.125. 4 3/16 ), ( Cylinder Bore Diameter: 4.125 120 ), ( Material: Aluminum Alloy ), ( Country/region Of Manufacture: United States ), ( Performance Part: Yes )
The JE 122m Piston for Harley-Davidson 125cc, 120cc, and 160cc engines is a high-performance upgrade designed to enhance the power and efficiency of your motorcycle. This piston is specifically engineered for big cam engines, ensuring a perfect fit and optimal performance.
The JE 122m Piston is crafted from a forged 2618-T6 aluminum alloy, which provides exceptional strength and durability. This alloy is heat-treated to increase its tensile and yield strength, ensuring that the piston can withstand the high temperatures and pressures generated during operation. The piston's skirt is honed to a mirror finish, which reduces friction and improves the piston's performance in the cylinder.
The JE 122m Piston features a high-domed design, which increases the combustion chamber volume and improves the engine's power output. The piston's crown is also optimized for big cam profiles, ensuring proper valve clearance and reducing the risk of valve contact. The piston's wrist pin groove is chamfered and relief-grooved, which reduces stress on the wrist pin and improves its durability.
The JE 122m Piston is also equipped with a low-tension piston pin, which reduces the load on the connecting rod and piston pin bearings. This reduces the risk of bearing failure and improves the engine's reliability and longevity. The piston pin is also coated with a wear-resistant material, which reduces friction and improves the piston's performance.
In summary, the JE 122m Piston is a high-quality upgrade for Harley-Davidson 125cc, 120cc, and 160cc engines. Its forged 2618-T6 aluminum alloy construction, high-domed design, and optimized crown make it a powerful and reliable performance upgrade. The piston's low-tension piston pin and wear-resistant pin coating further improve its durability and performance. Whether you're looking to increase your engine's power output or improve its reliability, the JE 122m Piston is a top-of-the-line upgrade that delivers exceptional results.
Pros of buying a 1948 Harley-Davidson JE 102M Piston:1. Historically Significant: This model is considered a classic and is highly sought after by collectors and enthusiasts. It represents a significant era in motorcycle history.
2. Unique Appeal: The 125cc engine size and vintage look make it stand out in a sea of modern motorcycles. It's a great conversation starter and a unique addition to any garage.
3. Manual Controls: The lack of modern amenities like electronic fuel injection, ABS, and power steering can be appealing to those who enjoy the simplicity and connection with the mechanical aspects of the bike.
4. Potential for Customization: Due to its age and simplicity, there's a lot of potential for customization. This can make the bike truly your own.
Cons of buying a 1948 Harley-Davidson JE 102M Piston:1. Reliability Issues: Older motorcycles like this one may have reliability issues due to wear and tear and the lack of modern technology. Regular maintenance and repairs can be costly.
2. Limited Performance: The 125cc engine provides limited power and speed compared to modern motorcycles. This may not be suitable for those who enjoy high-speed thrills.
3. Lack of Modern Safety Features: The bike lacks safety features such as ABS, airbags, and other safety technologies that are common in modern motorcycles.
4. Limited Comfort: The vintage design offers limited comfort compared to modern motorcycles. The seat, handlebars, and overall ergonomics may not be as comfortable for long rides.
Ending Conclusion:The 1948 Harley-Davidson JE 102M Piston is a unique and historically significant motorcycle that can be a great addition to any collection. However, it's important to be aware of its limitations, including reliability issues, limited performance, lack of modern safety features, and limited comfort. If you're willing to invest time, money, and effort into maintaining and customizing the bike, and if you enjoy the simplicity and vintage charm, then this bike could be a great fit for you. However, if you're looking for a reliable, high-performance, and comfortable daily ride, you might want to consider a more modern motorcycle.
Big 2 cam motors. With pins, rings,clips. Piston # 102M. 120 Je pistons 4.125 4 3/16.