fits model: Yfz450. make: Yamaha. year: 2007–2008.

( Brand: Wiseco ), ( Manufacturer Part Number: 7244-W281066-ATV ), ( Part Type: Bearing Crankshaft )
The **Wiseco 7244-W281066 ATV Crankshaft Bearing Kit** is a premium, high-performance replacement solution specifically engineered for the **2007 2008 Yamaha YFZ450 SE ATV**, ensuring optimal engine longevity and peak mechanical efficiency. Designed with precision and built to exacting standards, this kit features a **complete set of high-quality, aftermarket bearings** that replace the factory components in the crankshaft assembly, including the main and rod bearings, which are critical for reducing friction, dissipating heat, and maintaining smooth operation under demanding off-road conditions. Crafted from **high-grade, heat-treated steel** and treated with a **durable, corrosion-resistant coating**, these bearings are engineered to withstand the rigorous stresses of heavy-duty use, extended hours of operation, and the harsh environments typical of ATV riding whether on rough terrain, in dusty conditions, or under extreme temperatures. The Wiseco kit eliminates the need for mixing and matching parts, as it provides a **complete, ready-to-install solution**, including all necessary bearings in the correct sizes and configurations for seamless compatibility with the Yamaha YFZ450 SE s crankshaft housing. Whether you're a seasoned off-roader looking to restore factory performance or a DIY enthusiast performing routine maintenance, this kit offers a **reliable, cost-effective upgrade** that surpasses OEM specifications, reducing wear on the crankshaft, minimizing oil consumption, and extending the life of your engine. With Wiseco s reputation for durability and performance, this bearing kit is an essential component for anyone seeking to maximize the reliability and power output of their Yamaha YFZ450 SE.
The **Wiseco 7244-W281066 ATV Crankshaft Bearing Kit** is a popular aftermarket option for the 2007 2008 Yamaha YFZ450 SE ATV. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.
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### **Pros**
1. **High-Quality Materials** Wiseco bearings are known for using premium materials, including hardened steel and precision-engineered surfaces, which enhance durability and reduce wear compared to OEM parts.
2. **Improved Performance** Many users report smoother operation, reduced vibration, and better power transfer after installing Wiseco bearings. The tighter tolerances can also help maintain engine efficiency.
3. **Compatibility** This specific kit is designed for the Yamaha YFZ450 SE, ensuring a proper fit without modification. It includes all necessary bearings for the crankshaft assembly, including main and rod bearings.
4. **Durability** Wiseco bearings are often more resistant to heat and stress than stock components, which can extend the lifespan of the crankshaft and related parts.
5. **Widely Available** Wiseco is a well-established brand with broad availability through online retailers, ATV shops, and performance parts stores.
6. **Cost-Effective Upgrade** While slightly more expensive than OEM bearings, Wiseco offers a significant improvement in quality for a reasonable price compared to high-end aftermarket brands.
7. **Easy Installation** The kit comes with clear instructions, and the bearings are designed to fit standard tools, making the replacement process manageable for experienced DIYers.
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### **Cons**
1. **Higher Upfront Cost** Wiseco bearings are more expensive than OEM replacements, though the price difference is often justified by their performance benefits.
2. **Potential Overkill for Stock Engines** If the engine is in excellent condition and hasn t shown signs of excessive wear, upgrading to Wiseco bearings may not be immediately necessary. For stock engines, OEM bearings could suffice for the short term.
3. **Installation Requires Disassembly** Replacing crankshaft bearings demands removing the engine from the ATV, which is labor-intensive and time-consuming. This may not be ideal for casual riders or those without mechanical experience.
4. **Risk of Improper Installation** If not installed correctly, bearings can fail prematurely or cause damage to the crankshaft. Precision is critical, and inexperienced installers may need professional assistance.
5. **Limited Longevity Benefits Without Other Modifications** While Wiseco bearings improve performance, their full benefits may not be realized unless paired with other upgrades (e.g., upgraded oil, timing components, or a performance air filter).
6. **Warranty Considerations** Some Yamaha dealers or extended warranties may void coverage if aftermarket bearings are installed, though this varies by provider.
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### **Conclusion**
The **Wiseco 7244-W281066 crankshaft bearing kit** is a strong choice for the 2007 2008 Yamaha YFZ450 SE, especially if the engine has high mileage, shows signs of wear, or you re planning further modifications. The improved durability, smoother operation, and enhanced performance justify the cost for riders who prioritize longevity and reliability. However, if the engine is relatively new or in good condition, OEM bearings may be sufficient for now, and the upgrade can be deferred.
For most riders who plan to keep their ATV for years or push it harder (e.g., off-road racing, frequent heavy use), Wiseco bearings are a worthwhile investment. If you re unsure about installation, consider consulting a professional mechanic to ensure proper fitment and alignment.
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### **Recommendation**
**Buy the Wiseco kit if:**- Your YFZ450 SE has high mileage (10,000 miles) or shows signs of crankshaft wear (vibration, unusual noise, oil consumption).
- You re planning other engine modifications (e.g., upgraded pistons, camshafts, or exhaust) and want to future-proof the crankshaft.
- You re comfortable with engine disassembly or have access to a mechanic for installation.
**Avoid the Wiseco kit if:**- The engine is new or in excellent condition with no signs of wear.
- You re not planning to modify the ATV and want to minimize costs.
- You lack mechanical experience and are unwilling to invest time in a complex installation.
For a balance of cost and performance, Wiseco is one of the best aftermarket options available, and it s particularly valuable for riders who demand reliability from their ATV.
Parts without fitment are to be assumed universal and may require vehicle modification.: Brand: Wiseco, model Number: 7244-W281066-ATV. Compatibility: Years: Make: model: Application: Notes: 2011 - 2011 YamahaYFZ450X, 2003 2018 YamahaYZ450F, 1998 1999 YamahaWR400F, 2018 YamahaWR450F, 2001 2002 YamahaWR426F, 2005 2007 Suzuki RM-Z450, 2004 2013 YamahaYFZ450, 2007 2008 YamahaYFZ450 SE, 1999 YamahaYZ400F, 2016 2018 YamahaYZ450FX, 2009 2016 YamahaYFZ450R, 2000 2002 YamahaYZ426F, 2006 2007 YamahaYFZ450 Bill Balance Edition, 2010 2016 YamahaYFZ450R SE. Wiseco Crankshaft Bearing Kit for 2007 - 2008 Yamaha YFZ450 SE ATV.
This is helpful if you are buying multiple items. I need to exchange an item.