fits model: Yz490, Yz. make: Yamaha. year: 1984.

( Manufacturer Part Number: 10321 ), ( Type: Rim ), ( Placement On Vehicle: Front Wheel ), ( Wheel Width: 1.8 )
The **Yamaha YZ490 from 1984**, specifically the model equipped with the **10321 84 front wheel featuring a 21-inch rim**, represents a rare and highly sought-after piece of off-road motorcycle history. This classic dirt bike embodies the spirit of the early 1980s, a time when Yamaha revolutionized motocross with its innovative engineering and unmatched performance. The YZ490 was a dominant force in its era, known for its lightweight yet robust aluminum frame, which balanced agility with durability qualities that made it a favorite among professional racers and weekend enthusiasts alike. The front wheel assembly, part number **10321 84**, is a critical component of this legendary machine, featuring a **21-inch rim** designed to handle the rigors of high-speed jumps, tight turns, and rough terrain. Crafted with precision, this wheel was built to withstand the demands of motocross while maintaining optimal handling and braking performance. The YZ490 s air-cooled, single-cylinder, four-stroke engine paired with a smooth-shifting five-speed transmission delivered a perfect blend of power and control, making it a versatile ride for both track and trail. The bike s iconic design, including its sleek fairings, exposed valve covers, and distinctive Yamaha badging, adds to its timeless appeal. Whether you're a collector preserving a piece of motocross heritage or a rider seeking a reliable, high-performance machine, this 1984 YZ490 with its original front wheel is a testament to Yamaha s legacy of innovation and craftsmanship. Its rarity and historical significance make it a prized addition to any motorcycle enthusiast s collection.
### Pros and Cons of Buying a 1984 Yamaha YZ490 with a 21-Inch Front Wheel (Yamaha 10321 84 YZ490)
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#### **Pros**
1. **Classic and Reliable Design**
The YZ490 from 1984 is a well-regarded model in the motocross community, known for its durable frame, strong engine, and proven reliability. Yamaha s engineering from that era was robust, and many parts are still available through aftermarket suppliers or original Yamaha sources.
2. **Strong Engine Performance**
The 490cc two-stroke engine was a powerhouse in its time, capable of producing around 45-50 horsepower, which is competitive for its era. With proper maintenance, it can still deliver solid performance, especially for riders who prefer the raw, aggressive feel of two-strokes.
3. **Proven Suspension and Handling**
The YZ490 features a solid fork and rear shock setup that, while basic by modern standards, was highly effective for its time. The bike s geometry and handling were designed for aggressive riding, making it a favorite among enthusiasts who appreciate the classic motocross feel.
4. **Affordability**
Compared to modern motocross bikes, a 1984 YZ490 is significantly cheaper to purchase. This makes it an attractive option for riders on a budget, especially those who are looking for a project bike or a backup machine.
5. **Community and Customization**
The YZ490 has a dedicated following, with a wealth of aftermarket parts, upgrades, and tuning options available. From engine swaps (e.g., YZ250F or YZ300F engines) to modern suspension upgrades, there are plenty of ways to modernize or customize the bike to suit your preferences.
6. **Simplicity and Durability**
Two-stroke engines like the YZ490 s are known for their simplicity and durability. With proper care, they can last for decades, and many parts are easy to source or replace. This makes the bike a good choice for riders who enjoy working on their own machines.
7. **Nostalgia and Collectibility**
For riders who appreciate vintage machinery or have a fondness for the motocross culture of the 1980s, owning a YZ490 can be a nostalgic and rewarding experience. It s also a bike that can appreciate in value over time, especially if it s well-maintained or restored.
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#### **Cons**
1. **Age and Wear**
The bike is over 40 years old, which means it will likely require significant maintenance and repairs. Rust, worn-out components, and outdated materials (e.g., original tires, brakes, and suspension) are common issues that will need to be addressed.
2. **Outdated Safety Features**
Modern motocross bikes come with advanced safety features like disc brakes, modern suspension systems, and improved ergonomics. The YZ490 lacks these, making it less safe by today s standards. The drum brakes, in particular, are less effective than modern disc brakes.
3. **Emissions and Environmental Concerns**
Two-stroke engines like the YZ490 s are highly polluting compared to modern four-stroke or electric alternatives. If you plan to ride this bike in areas with strict emissions regulations, you may face legal or practical limitations.
4. **Limited Availability of Original Parts**
While aftermarket parts exist, some original Yamaha components may be difficult or expensive to find. This can make repairs or restorations more costly over time.
5. **Performance Limitations**
The YZ490 s power delivery is aggressive and raw, which can be fun but is also less refined than modern bikes. The lack of modern suspension tuning and ergonomics may make it less comfortable for riders who prefer a smoother ride or more precise handling.
6. **Maintenance Intensity**
Two-stroke engines require frequent maintenance, including regular oil changes, carburetor adjustments, and valve service. This can be time-consuming and costly if you re not experienced with two-stroke tuning.
7. **Resale Value**
While some classic bikes appreciate in value, the YZ490 is not a highly sought-after collector s item like some other Yamaha models (e.g., YZ250F or YZ300F). Its resale value is likely to be low unless it s in pristine condition or has unique modifications.
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#### **Conclusion**
Buying a 1984 Yamaha YZ490 with a 21-inch front wheel is a decision that appeals to riders who value nostalgia, simplicity, and the challenge of working on a classic machine. The bike offers a raw, powerful riding experience that is hard to replicate with modern bikes, and its affordability makes it an attractive option for enthusiasts or those on a budget. However, the age of the bike means it will require significant time, effort, and investment to keep it running reliably and safely.
If you re looking for a bike to ride regularly, especially in competitive or modern motocross environments, the YZ490 may not be the best choice due to its outdated technology and maintenance demands. On the other hand, if you re a rider who enjoys tinkering, appreciates vintage machinery, or wants a backup or project bike, the YZ490 can be a rewarding and fun purchase.
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#### **Recommendation**
- **Buy it if:** You re an experienced rider who enjoys working on bikes, appreciate the classic motocross feel, and are willing to invest time and money into restoring and maintaining it. It s also a good choice if you re looking for a budget-friendly alternative to modern bikes or a bike to race in vintage or historical events.
- **Avoid it if:** You prioritize safety, modern performance, and low maintenance. If you re not comfortable with the challenges of maintaining a 40-year-old two-stroke bike, or if you plan to ride it frequently in competitive settings, consider a modern motocross bike instead.
For those who do decide to purchase the YZ490, prioritize a thorough inspection of the frame, engine, suspension, and brakes. Consider consulting with experienced mechanics or joining motocross forums for advice on restoration and upgrades. If you re unsure about your ability to maintain the bike, factor in the cost of professional help when budgeting for the purchase.
This is the front wheel off a 1984 Yamaha YZ490. This is in used working condition.