fits model: Wr250f, Yz250f. make: Yamaha. year: 2001–2013.

( Brand: Pro X ), ( Manufacturer Part Number: 28.SIS2402-2 ), ( Part Type: Valve Spring Intake )
This is a high-quality intake valve spring kit specifically designed for the Yamaha WR250F and YZ250F models manufactured between 2001 and 2013. The kit, identified by the part number 28.sis2402-2, is a replacement for the original valve springs to ensure optimal engine performance.
The springs are made from premium spring steel, which is known for its durability and reliability. This material ensures that the springs can withstand the high-pressure and high-temperature environment within the engine cylinder. The use of spring steel also ensures consistent valve lift, a critical factor in maintaining engine efficiency and power output.
The kit includes two intake valve springs, each specifically designed to fit the WR250F and YZ250F models. The springs are precision-engineered to provide the correct force and lift for the engine's intake valves. This ensures that the engine can operate efficiently, delivering consistent power and performance.
The kit is easy to install and requires no special tools. It is designed to be a direct replacement for the original parts, making it a straightforward upgrade for any DIY enthusiast or professional mechanic.
In summary, this 28.sis2402-2 kit is a high-quality replacement intake valve spring set for the Yamaha WR250F and YZ250F models. Made from premium spring steel, it ensures consistent valve lift and improved engine performance. The kit is easy to install and provides a cost-effective way to maintain or upgrade the performance of your WR250F or YZ250F.
Pros of buying a (28.SIS2402-2) kit for the 2001-2013 WR250F and YZ250F:1. Improves engine performance: The kit uses high-quality valve springs made of spring steel, which can improve the engine's performance by increasing the valve lift and improving the intake and exhaust flow.
2. Enhances durability: The valve springs are made of high-quality materials that are designed to last longer than the stock springs, which can help reduce the risk of engine failure due to valve spring breakage.
3. Easy installation: The kit includes everything needed for installation, including new valve springs, retainers, and locking collars. The installation process is relatively simple and can be done at home with some basic tools.
4. Cost-effective: Compared to the cost of replacing the entire engine, the kit is a cost-effective solution for improving engine performance and durability.
Cons of buying a (28.SIS2402-2) kit for the 2001-2013 WR250F and YZ250F:1. May require additional tuning: Installing the kit may require additional tuning to ensure proper engine operation. This may include adjusting the ignition timing, air-fuel ratio, and other engine parameters.
2. Risk of damage: If not installed correctly, the kit can cause damage to the engine. It is important to follow the installation instructions carefully and seek professional assistance if necessary.
3. Potential increased noise: The kit may cause an increase in engine noise due to improved intake and exhaust flow. This may be a concern for riders who prefer a quieter ride.
Conclusion: The (28.SIS2402-2) kit is a great option for improving engine performance and durability for the 2001-2013 WR250F and YZ250F. However, it is important to consider the potential cons and seek professional assistance if necessary to ensure proper installation and operation. Overall, the kit is a cost-effective solution for riders who want to improve their bike's performance and extend its lifespan.
Recommendation: If you are considering purchasing the (28.SIS2402-2) kit, we recommend doing your research and reading reviews from other customers to ensure the kit is right for your bike and riding style. It is also important to consult with a professional mechanic to ensure proper installation and tuning. With proper installation and maintenance, the kit can provide significant performance improvements and help extend the lifespan of your engine.
Fully rebuild able utilizing your oem retainers, bases and seals without the need of any further engine modifications. Springs are made from premium chrome vanadium steel for higher performance and durability at high rpm.
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Comes as complete package of all intake valves and springs.
Special designed valve springs deal with the extra weight of the stainless steel valves.
Keep all packaging materials and the original shipping box.
21 4n stainless steel valves for increased durability and less wear under extreme conditions.
Buyer pays return shipping.
I will reply within 24 hours.
Black nitrated valves offer high micro hardness while super smooth surface finish reduces friction between stem and guide.
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