fits model: 650, Thunder. make: Yamaha.

( Manufacturer Part Number: 858-11631-00 ), ( Part Type: Jet Piston )
The Yamaha SR SnoScoot 650 is a powerful and versatile snowmobile engineered with an unyielding commitment to delivering an unmatched riding experience. With a sleek design and robust construction, this snowmobile is the epitome of style and performance. Our detailed product description will shed light on the key features and aspects that make the SR SnoScoot 650 an exceptional choice for discerning riders.
Engine: At the heart of the SR SnoScoot 650 is the sophisticated and powerful 649cc, liquid-cooled, single-cylinder, 4-stroke engine. With modern technologies like electronic fuel injection (EFI) and high-compression, this engine not only packs a powerful punch but also delivers outstanding fuel efficiency and earth-friendly emission levels. The engine comes with a convenient electric start system, making it effortless to get going on even the coldest winter mornings.
Chassis: The SR SnoScoot 650 boasts an advanced chassis design, featuring a double-wishbone front suspension and a custom-tuned reverse-(/RATRACK) Mono-Arm rear suspension to deliver a luxuriously smooth ride. The skis are built from lightweight, yet durable materials and are designed with optimal contact patches for superior traction and handling. Adjustable traction and suspension settings allow riders to tailor the performance of the snowmobile to their preferences and riding conditions.
Comfort and Ergonomics: The Yamaha SR SnoScoot 650 provides its riders with utmost comfort and ergonomics. The low-profile seat is well-contoured and provides ample support, while the handlebars are adjustable to cater to different rider sizes and preferences. The instrument panel is clear, concise, and easy to read, keeping riders informed about vital engine and system data.
Agn s: The SR SnoScoot 650 is equipped with an advanced cooling system, ensuring consistent performance in even the most demanding riding conditions. This includes a high-capacity radiator and a reverse-air intake system that expels cold air from the exhaust, keeping the engine running cool. A heated grips and seat feature adds an extra layer of comfort while ensuring maximum operating efficiency.
Accessories: The SR-650 comes with a wide range of available accessories, allowing riders to customize their snowmobile to suit their needs and preferences. These include storage solutions, heated grips and vents, different colored skis and seat covers, and various replacement parts for maintenance or upgrades.
In conclusion, the Yamaha SR SnoScoot 650 with model number 858-11631-00 is a versatile and high-performance snowmobile designed to cater to the most demanding riders. With its powerful engine, advanced suspension systems, ergonomic design, and extensive range of accessories, it promises a thrilling and enjoyable snowmobiling experience.
The Yamaha SR 643 Piston Sno Jet Thunder 650 is a snowmobile model from Yamaha, designed for snow enthusiasts who desire high-performance and durability. In this analysis, we will be discussing the key pros and cons of this snowmobile to help potential buyers make an informed decision.
Pros:1. Power and Performance: The SR 643 boasts a 649cc, three-cylinder engine that delivers impressive power and torque. This translates to robust acceleration and a thrilling riding experience.
2. Lightweight and Agile: With its lightweight design, the SR 643 is agile and maneuverable, making it an excellent choice for riders navigating through dense forests or tight trails.
3. Ride Comfort: The Sno Jet Thunder 650 edition features a plush and adjusted suspension system, ensuring a smooth and comfortable ride.
4. Durability: Yamaha's reputation for engineering high-quality snowmobiles is well-known, and the SR 643 continues this trend with its robust construction, designed to withstand the harsh winter conditions.
5. Versatile: The SR 643 is a versatile snowmobile suitable for various terrains and riding styles, catering to both novice and experienced riders.
Cons:1. Price: The Yamaha SR 643 Piston Sno Jet Thunder 650 comes with a relatively high price tag compared to some other snowmobiles in its class.
2. Fuel Consumption: The Snow Jet Thunder 650 engine is known for consuming more fuel than other snowmobile engines in its class, which can be a drawback for those who frequently use their snowmobiles.
3. Maintenance Requirements: Given its high-performance engine, the SR 643 may require more frequent maintenance than other snowmobiles in its class.
Conclusion:The Yamaha SR 643 Piston Sno Jet Thunder 650 is an excellent snowmobile option for those seeking power, performance, comfort, durability, and agility. Its lightweight design, versatility, and high-quality suspension make it an exceptional choice for snow enthusiasts. However, potential buyers should consider its high price tag, increased fuel consumption, and higher maintenance requirements before making their purchase. Ultimately, the Yamaha SR 643 offers an unmatched riding experience and is a solid investment for those looking to elevate their snowmobiling adventures.
Recommendation:If you are an avid snowmobiler seeking a powerful, agile, and durable snowmobile, the Yamaha SR 643 Piston Sno Jet Thunder 650 is an excellent choice. Despite its high price tag, fuel consumption, and maintenance requirements, the SR 643 delivers an unparalleled riding experience. For those on a tighter budget or concerned about fuel economy, you may consider alternative options in its class. Nonetheless, for unrivaled performance, the Yamaha SR 643 Piston Sno Jet Thunder 650 is an outstanding investment for snowmobile enthusiasts.
This piston has spots on it but would clean off with some 400 wet sand paper easily. One new oem Yamaha piston for a 1973 sr 643 snowmobile part.