fits model: Yz85. make: Yamaha. year: 2002–2018.

( Brand: Athena ), ( Manufacturer Part Number: S4F05300002A ), ( Part Type: Piston ), ( Warranty Details: See Manufacturer )
The Athena S4F 05300002A 105cc big piston kit is an excellent upgrade for the Yamaha YZ85 motorcycle model years 2002-2018. This performance enhancement is designed to boost the power output of your bike, providing an exciting riding experience.
The Athena S4F 05300002A 105cc kit is a big piston kit, which means that it includes a larger displacement piston. A larger piston allows the engine to burn more fuel and air, increasing the engine's power output. The piston is made of high-quality forged material for added strength and durability.
The kit also includes a matched set of grateful rings. The rings are designed to work in conjunction with the larger piston, ensuring optimal engine performance. The rings have been carefully engineered to provide a tight seal in the cylinder, reducing the possibility of oil consumption and engine wear.
Moreover, the Athena S4F 05300002A 105cc kit includes a matched set of gaskets. These gaskets ensure a perfect seal between the engine's components, preventing any oil or coolant leaks. The gaskets are made of high-quality material and are precision-machined to ensure a perfect fit.
The kit also includes a cylinder head gasket. This gasket plays a crucial role in ensuring a proper seal between the cylinder head and the engine block. The cylinder head gasket is made of a high-quality material and is precision-machined to ensure a perfect fit.
The Athena S4F 05300002A 105cc big piston kit comes with detailed, easy-to-follow instructions, making the installation process simple and straightforward. Moreover, the kit is backed by Athena's excellent customer service, ensuring that any issues are addressed promptly and effectively.
In summary, the Athena S4F 05300002A 105cc big piston kit is an excellent performance enhancement for the Yamaha YZ85 motorcycle model years 2002-2018. With its high-quality components, easy installation process, and excellent customer support, this kit is the perfect choice for riders looking to boost their bike's power output and riding experience.
1. **Power and Performance**
* Pros:- Larger displacement engine (105cc) delivers more power and torque compared to the standard 70cc engine of the YZ85.
- Suitable for competitive racing, particularly for riders looking for a slight edge in power on the track.
* Cons:- Increased power may not be ideal for novice or inexperienced riders, requiring advanced skills to handle effectively.
- Higher fuel consumption due to increased power output.
2. **Durability**
* Pros:- The Athena big piston kit is known for its durability and reliability, which may translate to fewer repairs and maintenance costs over time.
* Cons:- The upgrade may void the original factory warranty, meaning potential buyers would be taking on the responsibility for any engine damage or mechanical issues without the protection of a manufacturer's warranty.
3. **Price**
* Pros:- The Athena big piston kit for the Yamaha YZ85 can be a cost-effective alternative to purchasing an entirely new motorcycle with a larger engine.
* Cons:- Potential buyers should consider the extra cost of the upgrade kit, as well as any additional expenses related to installation, tuning, and modifications to optimize the engine's performance for the upgrade.
4. **Compatibility and Installation**
* Pros:- The Athena S4F05300002A big piston kit is specifically designed for the Yamaha YZ85 (2002-2018), ensuring a reliable and precise fit.
* Cons:- Installation of the kit is not a straightforward process and often requires specialized tools and expertise. Some riders may opt to have the work done by a professional mechanic.
In conclusion, the Athena S4F05300002A 105cc big piston kit for the Yamaha YZ85 (2002-2018) offers increased power and performance, durability, and potential cost savings compared to purchasing a new motorcycle. However, the upgrade may not be suitable for novice riders, and it comes with installation complexity, potential warranty concerns, and additional costs.
Based on this analysis, potential buyers should consider their skill level, budget, and riding goals when deciding whether to invest in the Athena big piston kit for their Yamaha YZ85 (2002-2018). For advanced riders seeking more power and a competitive edge, this upgrade may be an excellent choice; however, for riders learning the ropes, it may be best to stick with the stock engine until they are ready to handle the additional power.
Includes 3% copper in materials for better heat resistance. All pistons are forged using a precision heat-treatment process that allows for production tolerances of just 0.01mm. Made in Italy. Athena 105cc Replacement Big Bore Piston for Yamaha YZ85 2002 -2018: pistons are made from a high-silicon aluminum alloy, the same material used to produce Formula 1.
Note: Image is for reference only, actual product may vary slightly depending on your specific application. Piston tooling allows for the lightest available product. Athena pistons are sold individually. NOTE: Only works with Athena Cylinder Kit #P 8 or #P 9 sold separately.
Kits include anti-wear coated piston, ring, pin and cir clips.