fits model: Yz490, Mx, Yz. make: Yamaha. year: 1984-90–1986.

( Manufacturer Part Number: YZ490 ), ( Part Type: Cylinder Head )
The 1986 Yamaha YZ490 cylinder head, specifically designed for use in AHRMA MX bikes from 1984 to 1990, is a testament to Yamaha's engineering excellence and their commitment to high-performance motorcycles. This cylinder head is a crucial component of the YZ490 engine, responsible for the efficient intake and exhaust of gases, thereby significantly affecting the engine's power output and overall performance.
This particular cylinder head is a well-preserved piece from the 1986 model year. It features a robust construction with a high-compression combustion chamber, designed to support the high-revving nature of the YZ490 engine. The cylinder head is equipped with twin spark plugs, a feature that enhances ignition efficiency and improves combustion, resulting in a more potent power delivery.
The intake and exhaust ports of this cylinder head are meticulously designed to ensure optimal gas flow. The intake port is designed to draw in a sufficient amount of air-fuel mixture, while the exhaust port is engineered to expel exhaust gases efficiently, reducing backpressure and improving engine performance.
The cylinder head also includes a high-quality, adjustable camshaft that plays a crucial role in the engine's power delivery. The camshaft's timing and lift can be fine-tuned to match the specific engine modifications, ensuring optimal performance.
This 1986 Yamaha YZ490 cylinder head is a must-have for any enthusiast or racer looking to restore or upgrade their vintage AHRMA MX bike. It's a chance to own a piece of motorcycling history while also enjoying the performance benefits that come with it.
Pros of buying a 1986 Yamaha YZ490 AHRMA MX cylinder head:1. Historical Value: The 1980s were a golden era for motocross, and owning a piece of that history can be a source of pride.
2. Affordability: Compared to modern motocross bikes, vintage models like the YZ490 are often more affordable, making them a good option for enthusiasts on a budget.
3. Unique Character: Older bikes often have a unique character and charm that can't be replicated by modern machines.
4. Simplicity: Vintage bikes are often simpler in design, which can make them easier to maintain and repair.
Cons of buying a 1986 Yamaha YZ490 AHRMA MX cylinder head:1. Performance: Compared to modern bikes, the YZ490 will likely have less power and performance.
2. Reliability: Older bikes may require more frequent maintenance and repairs.
3. Availability of Parts: Finding replacement parts for vintage bikes can be difficult and expensive.
4. Safety: Modern motocross bikes often have more advanced safety features than vintage models.
Conclusion:If you are a vintage motocross enthusiast with a passion for the sport's history and are looking for a budget-friendly option, a 1986 Yamaha YZ490 AHRMA MX cylinder head could be a great choice. However, be prepared for the potential challenges of owning a vintage bike, such as lower performance, increased maintenance, and difficulty finding replacement parts.
Recommendation:If you are new to motocross or looking for a bike that offers better performance and reliability, I would recommend considering a newer model instead. However, if you are an experienced rider with a passion for vintage motocross and are willing to put in the time and effort to maintain and repair the bike, a 1986 Yamaha YZ490 AHRMA MX cylinder head could be a rewarding addition to your collection.
Parts of a 1986 Yamaha YZ490.