fits model: X2, 400. year: 1974–1980.

( Part Type: Piston )
Introducing a pair of high-quality pistons specifically designed for the 1974-1976 Cuyuna LR399 engines, these pistons are a perfect upgrade for your motorcycle. Each piston is crafted by Wiseco, a renowned name in the world of performance parts, ensuring you're getting a reliable and durable product.
These pistons are sized at 400cc and have a compression height of 80mm, making them an excellent choice for engines seeking improved performance and efficiency. The pistons are designed to fit perfectly into your LR399, with a bore diameter of 78mm and a deck height of 1mm, ensuring a seamless installation process.
The pistons feature a JLO (JayLynn Olsen) dome design, which is known for its excellent combustion chamber shape, promoting efficient combustion and reducing engine knock. The pistons are also coated with a Nikasil coating, a nickel-silicon carbide coating that provides superior heat resistance and durability, extending the life of the piston and reducing the risk of engine failure due to overheating.
Furthermore, these pistons are made with a forged construction process, which ensures they are sturdy and able to handle the rigors of high-performance riding. This forging process also gives the pistons excellent strength and fatigue resistance, ensuring they can withstand the high pressures and loads encountered in high-performance applications.
In conclusion, these 75 LR399 Wiseco pistons are an excellent choice for those looking to upgrade their motorcycle's performance. With their high-quality construction, efficient combustion chamber design, and superior heat resistance, these pistons are sure to provide you with improved engine performance and longevity.
Pros of buying a 2x 75 lr399 Cuyuna Wiseco 400 80 1mm JLO pistons:1. High-quality materials: Wiseco pistons are known for their durability and reliability, made from top-quality aluminum alloys.
2. Improved performance: Wiseco pistons are designed to increase engine power and improve combustion efficiency, resulting in better performance.
3. Custom fit: These pistons are specifically designed for 1974-1976 750cc Honda XL750 motorcycles, ensuring a perfect fit and maximizing engine performance.
4. JLO coating: The pistons have a JLO coating, which reduces friction and heat, extending the lifespan of the piston and improving overall engine performance.
Cons of buying a 2x 75 lr399 Cuyuna Wiseco 400 80 1mm JLO pistons:1. Higher cost: Wiseco pistons are generally more expensive than OEM (original equipment manufacturer) pistons, which may be a consideration for budget-conscious buyers.
2. Requires matching components: To ensure optimal performance, the pistons may require matching rings and other components, which can add to the overall cost.
3. May require professional installation: While some riders may be able to install the pistons themselves, it is recommended to have a professional mechanic perform the installation to ensure proper fit and function.
Conclusion:If you are looking for improved performance and durability for your 1974-1976 750cc Honda XL750 motorcycle, the 2x 75 lr399 Cuyuna Wiseco 400 80 1mm JLO pistons are a great option. The high-quality materials, custom fit, and JLO coating provide numerous benefits to the engine. However, the higher cost and potential need for additional components and professional installation should be considered before making a purchase.
Recommendation:If you are comfortable with the higher cost and are looking for improved engine performance, the 2x 75 lr399 Cuyuna Wiseco 400 80 1mm JLO pistons are a recommended upgrade for your 1974-1976 750cc Honda XL750 motorcycle. However, it is recommended to consult with a professional mechanic to ensure proper fit, function, and installation to maximize the benefits of the pistons.
These hard to find vintage nos items could be a big help with your restoration or nice item to have on hand for your classic sled. Wiseco 2068p4 66mm 1mm.
04 oversize for jlo LR399 2/9 and cuyuna 400cc twin engines for various sleds that used these engines.