fits model: 500, Cheetah, Cougar. make: Arctic, Arctic-cat. year: 1986–1990.

( Brand: Spi ), ( Manufacturer Part Number: 09-691N ), ( Part Type: Piston )
The SPI 09-691N Standard Piston is a crucial component for the Arctic Cat Cheetah 500 and Cougar models produced between 1986 and 1990. This piston, specifically designed for engines with a 70mm bore, is an essential upgrade for those seeking optimal engine performance.
The SPI 09-691N piston is engineered with a forged design, ensuring superior strength and durability. Its construction is made of high-quality aluminum alloy, offering excellent heat dissipation properties. The piston crown is machined to precise specifications, ensuring proper compression and power transfer from the crankshaft.
The piston ring grooves are designed to accommodate standard piston rings, ensuring a proper seal between the piston and cylinder wall. The skirt of the piston is machined to a precise diameter and finish, ensuring a snug fit within the engine's cylinder bore.
Additionally, the SPI 09-691N piston features a balanced design, reducing engine vibration and promoting smooth engine operation. Its precise dimensions and finely tuned design make it an excellent choice for high-performance applications.
This piston is ideal for those seeking to restore their classic Arctic Cat Cheetah 500 or Cougar models to their former glory or for those seeking to enhance the performance of their snowmobiles. The SPI 09-691N Standard Piston is a must-have upgrade for any enthusiast looking to maximize the potential of their Arctic Cat snowmobile.
It's important to note that the installation of this piston requires the appropriate knowledge and tools, and it is recommended that it be installed by a professional mechanic or experienced enthusiast. Always ensure that the engine is disassembled, inspected, and reassembled according to the manufacturer's instructions to ensure proper installation and optimal performance.
a. Improved Performance: This aftermarket piston is designed to provide better compressions and increased power output compared to the OEM piston.
b. Durability: The SPI 09-691N piston is made of high-quality materials, ensuring longer service life and reliability.
c. Engine Upgrades: Installing a high-performance piston like the SPI 09-691N can be a part of a wider engine upgrade project, potentially increasing the overall value and enjoyment of your Arctic Cat Cheetah 500 Cougar.
2. Cons:a. Cost: The aftermarket piston is generally more expensive than the OEM piston, which might be a significant investment for some owners.
b. Installation Complexity: Installing a new piston involves disassembling the engine, which can be a time-consuming and labor-intensive process.
c. Risk of Damage: There is always a risk of damaging other engine components during the installation process, which could lead to additional repair costs.
3. Conclusion:Buying an SPI 09-691N standard piston for your Arctic Cat Cheetah 500 Cougar (1986-1990) can offer improved performance, durability, and the potential for engine upgrades. However, it comes with a higher cost, installation complexity, and the risk of damaging other engine components during installation.
4. Recommendation:If you are an enthusiast looking to maximize the performance of your Arctic Cat Cheetah 500 Cougar and are comfortable with the additional cost, time investment, and risks associated with installing an aftermarket piston, then the SPI 09-691N standard piston is an excellent choice. On the other hand, if you prefer a more budget-friendly and less complex solution, you might consider sticking with the OEM piston. Ultimately, the decision depends on your goals, budget, and mechanical expertise.
All pistons, rings, pins and cir clips are manufactured to OEM specifications. 1986 Cougar 500 F/C. OEM piston kits. Manufactured by SPI.
Includes: 2 Pistons, ring sets, wrist pins cir clips. Pistons are for standard bore size 70.00mm. Made in Taiwan. Compatible with Arctic Cat model's below: 1986 Cheetah 500 F/C.
Piston weight compatible with original piston.