fits model: Wr250f, Yz250f. make: Yamaha.

( Brand: Cylinder Works ), ( Manufacturer Part Number: 21002-K01 ), ( Item: Big Bore Cylinder Kit )
The 21002-K01 Cylinder Big Kit is an exceptional upgrade for your Yamaha WR250F or YZ250F. This kit, designed specifically for these models, is a comprehensive solution to enhance your engine's performance and longevity.
The kit includes a high-performance oversized cylinder, which increases the displacement from the standard 249cc to a powerful 269cc. This larger cylinder is crafted from high-quality aluminum alloy, ensuring durability and lightweight performance. The oversized bore and stroke not only provide more power but also improve the engine's breathing, resulting in smoother and more efficient combustion.
The kit also includes a matching oversized piston, cylinder head, and cylinder head gasket. The piston is made from forged aluminum, ensuring superior strength and reliability. The cylinder head is CNC-machined for precise fit and finish, and both components are designed to work together for optimal engine performance.
The 21002-K01 Cylinder Big Kit also includes a high-performance camshaft, which increases the engine's rev limit and improves its power output. The camshaft is machined from high-quality steel and is designed to work perfectly with the oversized cylinder and piston.
The kit also includes a high-performance oil pump, which ensures that the engine receives an adequate supply of oil at high revs. This is particularly important for the increased power and rev limit provided by the kit.
Installing the 21002-K01 Cylinder Big Kit is a straightforward process, and detailed installation instructions are included with the kit. The kit also includes all necessary hardware, making the installation process as hassle-free as possible.
In summary, the 21002-K01 Cylinder Big Kit is a comprehensive solution for enhancing the performance and longevity of your Yamaha WR250F or YZ250F. With its oversized cylinder, piston, and cylinder head, high-performance camshaft, and high-performance oil pump, this kit provides more power, smoother operation, and improved reliability. Whether you're a weekend warrior or a professional racer, the 21002-K01 Cylinder Big Kit is an excellent investment for your Yamaha WR250F or YZ250F.
Pros of buying a 21002-K01 Cylinder Big Kit for Yamaha WR250F/YZ250F:1. Performance Boost: The kit is designed to increase the engine's power and torque, providing a more thrilling riding experience.
2. Durability: The kit is made from high-quality materials, ensuring long-lasting performance and reliability.
3. Improved Engine Longevity: By upgrading the cylinder, you can help to extend the lifespan of your engine.
4. Cost-Effective: Compared to buying a new bike, upgrading your existing one with this kit can be a more cost-effective option.
Cons of buying a 21002-K01 Cylinder Big Kit for Yamaha WR250F/YZ250F:1. Installation Complexity: Installing the kit may require professional assistance or extensive mechanical knowledge, which could incur additional costs.
2. Potential Impact on Warranty: Some manufacturers may void the warranty if aftermarket parts are installed, so it's essential to check your warranty information beforehand.
3. Potential Engine Noise Increase: The performance boost may lead to an increase in engine noise, which could be a concern for some riders.
Conclusion:The 21002-K01 Cylinder Big Kit offers a significant performance boost for your Yamaha WR250F/YZ250F, making it a worthwhile investment for enthusiasts seeking more power and a thrilling riding experience. However, it's crucial to consider the potential installation complexity and potential impact on warranty before making a decision. If you're confident in your mechanical abilities or willing to pay for professional installation, this kit could be a great addition to your bike.
Replacement piston kits and gaskets available.
Kit comes complete with Cylinder, piston kit, and gaskets.
Cylinders are nickel silicon carbide plated for long life and honed to exact size easy piston installation.
Designed for easy bolt on installation, with no machine work to your engine or cases.