fits model: G7s, G6s. make: Yamaha. year: 1972.

( Manufacturer Part Number: 180-11111-02 ), ( Part Type: Cylinder Head ), ( Engine Type: 2-stroke ), ( Vintage Part: Yes )
The Yamaha 180-11111-02 cylinder head is a vintage part designed for the G7S and G6S series engines, specifically models produced in 1972. This cylinder head is a testament to Yamaha's engineering prowess in the 1970s, combining durability, performance, and reliability.
The cylinder head is constructed from high-quality aluminum alloy, ensuring lightweight yet robust performance. It features four valve ports, two intake and two exhaust, each with a diameter of 32mm. The valve guides are precision-machined to ensure a perfect seal and minimize wear and tear.
The combustion chamber is designed with a 72mm bore and 79.5mm stroke, providing ample space for the fuel-air mixture to ignite and expand, resulting in optimal engine performance. The cylinder head also includes a single spark plug hole, located centrally to facilitate even combustion.
The cylinder head is equipped with a single camshaft, which operates through a double overhead cam (DOHC) configuration. The camshaft is designed to provide a smooth and efficient intake and exhaust stroke, resulting in optimal engine performance.
The cylinder head is easy to install, with straightforward bolt-on design. It comes with new gaskets and hardware, ensuring a hassle-free installation process. This replacement part is an excellent choice for restoring or maintaining your vintage Yamaha engine, ensuring it continues to run smoothly and efficiently.
Pros of buying Yamaha 1972 G7S/G6S Cylinder Head (180-11111-02):1. OEM Part: This is an original equipment manufacturer (OEM) part, ensuring compatibility and reliability with your Yamaha engine.
2. Quality: Yamaha is renowned for its high-quality parts, which means you can expect durability and performance.
3. Availability: This part is available for purchase, which can help you resolve any issues with your engine promptly.
Cons of buying Yamaha 1972 G7S/G6S Cylinder Head (180-11111-02):1. Price: OEM parts can be more expensive than aftermarket alternatives.
2. Shipping Costs: Depending on your location, shipping costs for this part may add to the overall expense.
3. Availability Delays: There might be a delay in the availability or delivery of the part due to various reasons like supplier issues or shipping delays.
Conclusion: While the Yamaha 1972 G7S/G6S Cylinder Head (180-11111-02) is an excellent choice for ensuring compatibility and reliability, its price and potential delivery delays might be considerations. If you value the benefits of an OEM part and are willing to pay a premium, this part may be a great choice. However, if you're looking for a more cost-effective solution, you might want to explore aftermarket options.
Recommendation: If you have the budget and prefer the benefits of an OEM part, the Yamaha 1972 G7S/G6S Cylinder Head (180-11111-02) should be a suitable choice. On the other hand, if you're looking for a more cost-effective alternative, researching aftermarket options with a good reputation in compatibility and performance can be a valuable investment.
Cylinder head in very good condition. No broken fins.Spark plug hole threads not perfect, BUT spark screws in tight.