CYLINDER FULL KIT 58mm YAMAHA YZ 125 22-26, ATHENA P400485100101 BIG BORE, (Piston included)
Athena Big Bore Cylinder Kit for Yamaha YZ 125 models. This kit increases displacement to 144cc with a 58mm bore diameter and a 15.4:1 compression ratio. Features an aluminum cylinder with optimized geometries, intake, and exhaust ports for efficient combustion and optimal gas flow. Includes a modular head with an aluminum outer shell and bronze inner dome for customizable squish and compression ratios, improved heat dissipation, and increased reliability. The exhaust power valves are made from Ergal 7075 with hard anodizing for high temperature resistance and durability. The kit includes a high-quality gasket set for complete installation.
- SKU
- 56-K1993.58.CKA.BB
- Brand
- Athena
- Availability
- In Stock (1)
FULL DESCRIPTION
Athena Big Bore Cylinder Kit 58mm for Yamaha YZ 125
Elevate your Yamaha YZ 125 with the Athena Big Bore Cylinder Kit, engineered to maximize power and track performance. This kit transforms your standard bore cylinder into a high-performance 144cc powerhouse, delivering a surge of power from the first twist of the throttle.
Experience advanced technology designed for superior performance. The aluminum cylinder features optimized geometries for combustion efficiency, with intake and exhaust ports designed for optimal gas flow. Large water jackets are tailored to prevent overheating during demanding sessions, ensuring smooth and balanced power delivery across the entire RPM range.
The modular cylinder head boasts an aluminum outer shell and a bronze inner dome, allowing for customization of squish and compression ratios. This innovative design enhances heat dissipation, increases reliability, and extends engine life, especially under extreme off-road conditions. The self-centering dome ensures a perfect seal and optimal combustion for smooth and consistent power.
Durable and reliable exhaust power valves, constructed from Ergal 7075 with hard anodizing, offer resistance to high temperatures while remaining lightweight. Precisely engineered, these valves ensure an airtight seal, preventing compression losses and maintaining combustion efficiency for consistent power delivery.
This complete kit includes a high-quality gasket set, designed for a perfect installation and engineered to withstand extreme track conditions, ensuring a perfect seal and long engine life.
Key Features:
- Increases displacement to 144cc
- Aluminum cylinder with optimized geometries for combustion efficiency
- Optimized intake and exhaust ports for maximum gas flow
- Large water jackets to prevent overheating
- Modular cylinder head with customizable squish and compression ratios
- Bronze inner dome for improved heat dissipation and reliability
- Ergal 7075 exhaust power valves with hard anodizing
- Complete kit including high-quality gasket set
Specifications:
- Bore Diameter: 58 mm
- Displacement: 144 cc
- Compression Ratio: 15.4:1