






ATHENA
REPLACEMENT FOR CYLINDER KIT BIG BORE; YAMAHA YZ 85 02-25; 52.
Out of stock · stock as of Sep 3, 2026
Shipping calculated at checkout
30-day returns on unused parts
Details
Experience maximum strength, reduced friction, and race-proven reliability with an Athena Forged Piston Kit. Manufactured using advanced reverse extrusion and precision CNC machining, this forged high-silicon aluminum piston is built to withstand the demands of high-performance off-road riding. Engineered and tested in Italy, the kit delivers OE-level fitment with enhanced durability, smoother power delivery, and long-lasting performance for competitive and recreational riders alike. Forged high-silicon aluminum piston provides superior strength and durability Precision CNC-machined to tolerances under 0.01mm for exceptional fit and performance Molybdenum disulfide skirt coating reduces friction and minimizes engine wear Japanese-made piston ring features wear-resistant coating for improved sealing and longevity Designed, engineered, and dyno tested in Italy for race-proven reliability Compatible with Athena and OEM cylinders Includes: Forged Piston Piston Ring (1) Wrist Pin Circlips Displacement: 85cc Compression: Standard Piston Size: 52.95mm Piston Type: Forged Piston Head: Flat Piston Pin: Standard Wrist Pin Dimensions: 14 x 10 x 41mm Compression Height: 26.00mm Forged Side Relief Skirt Intended for competitive or high-performance off-road applications where permitted by local regulations
Specs
- Vehicle
- Offroad
- Weight Lb
- 0.0
- Shipping Class
- standard


