fits model: Yz490, It490. make: Yamaha.

( Brand: Wiseco Piston ), ( Manufacturer Part Number: 478M08800 ), ( Warranty Details: See Manufacturer )
The WISCO Piston 478M08800 is a high-performance aftermarket piston specifically designed for the Yamaha YZ490 and IT490 motorcycles. This piston comes with a compression height of 88.00mm and a piston diameter of 1.00mm, making it an excellent fit for these particular models.
C crafted from a forged H111 aluminum alloy, this piston boasts superior strength and durability, allowing it to withstand the demands of aggressive riding and racing applications. The piston's skirts are engineered with a brand new design, featuring angled chamfers and a slim piston shape, providing improved ring seizure and enhanced engine performance. The top ring groove is situated at 40mm from the piston pin, allowing easy ring installation and facilitating superior ring seal.
The WISCO 478M08800 piston features a dish length of 47.8mm, which optimizes engine compression and power output. Additionally, its square-top design allows for improved combustion efficiency and an overall boost in horsepower. This piston's innovative design also ensures minimal piston-to-wall friction, reducing the possibility of detonation and engine damage during high rpm operation. The piston features a pad length of 38.0mm and an oil control ring groove offset of 0.6mm.
The piston's crown profile accommodates a Factory Race addition of an optional honing process for an even smoother finish. The piston's wet barrel design helps in reducing oil consumption and minimizing wear on the piston rings. This WISCO piston ships with a piston pin, piston rings, and a pin bush. The piston ring set comes with a compression ring, oil control ring, and a top ring, all compatible with standard and aftermarket head gaskets.
This WISCO piston's sleek design, improved functionality, and high-quality materials make it an excellent replacement option for stock pistons. With its focus on superior performance and durability, the 478M08800 piston is perfect for those seeking to take their Yamaha YZ490 or IT490 to the next level.
Purchasing a Wiseco 478m08800 1.00mm 88.00mm piston for a Yamaha YZ490/IT490 involves weighing the potential benefits against the possible drawbacks. Here's a detailed analysis:
Pros:1. Enhanced Performance: High-performance pistons like the Wiseco 478m08800 are designed to increase power output and overall engine performance. With its forged construction and optimized ring pack, this piston can potentially provide better compression, increased horsepower, and improved engine response.
2. Durability: Forged pistons, like the one offered by Wiseco, are typically more durable than their cast counterparts. They can better withstand the rigors of high-performance use and may last longer, leading to fewer engine rebuilds and saving you money in the long run.
3. Customizability: Wiseco offers a variety of prescription pistons tailored to specific applications. These custom pistons can help you achieve a more significant power boost and optimize engine performance for your specific riding style or racing class.
Cons:1. Cost: Higher-performance pistons like the Wiseco 478m08800 are typically more expensive than stock pistons. This increased cost may be a significant consideration for some riders, especially those on a tight budget.
2. Installation Complexity: Installing a performance piston such as this one can be more complicated than a stock replacement. It may require specialized tools and a higher level of mechanical skill. Depending on your experience level, this could potentially involve additional labor costs or the need to hire a professional mechanic.
3. Engine Tuning: Installing a high-performance piston like the Wiseco 478m08800 may require additional engine tuning to optimize power output and ensure proper operation. This could potentially involve adjusting the carburetor or fuel injection system, exhaust system, or timing.
Conclusion:Considering the pros and cons, the Wiseco 478m08800 1.00mm 88.00mm piston for a Yamaha YZ490/IT490 offers the potential for improved engine performance and increased durability. However, these benefits come with a higher cost compared to stock pistons and a greater installation complexity. Ultimately, the decision to purchase this piston depends on your budget, mechanical skills, and desire for additional power and enhanced engine performance. If these factors align with your goals and you are willing to invest in the installation and potential tuning costs, the Wiseco piston could be an excellent choice for your Yamaha YZ490/IT490.
Recommendation:If you are an experienced rider with mechanical skills, comfortable with the installation complexity and associated costs, and looking for enhanced engine performance and durability, then the Wiseco 478m08800 1.00mm 88.00mm piston is a suitable choice for your Yamaha YZ490/IT490. However, if you are new to motorcycle maintenance or have limited resources, it may be advisable to first consider optimizing your stock piston through regular maintenance and proper care before opting for a higher-performance replacement.
Chosen by top race teams, in all forms of racing. Extended life and sustained power. CNC machined. Race proven designs.
Note: All kits cover a single cylinder only. High-performance ring set. All Wiseco Piston kits include 1 Piston, ring set, wrist pin and 2 cir clips. Precision machined, highest quality materials for strength and reduced friction.
Optimal cam shape and profile for peak HP service life. Highest quality, alloy pin. Superior strength/weight ratio utilizing Aerospace alloy. Consistently true and durable.