CYLINDER KIT 04-13 YFZ450 95mm AT-09470K CX-40005K
Cylinder rebuild kit for YFZ450 2004-2013. Standard bore 95.00mm. Compression 11.4:1. Features a Hyperdryve racing piston. Constructed from AB4C aluminum with Nikasil plated sleeves, designed strictly to OEM specifications. Psychic cylinders offer excellent wear capabilities and are typically a simple drop-in installation requiring no case modifications. Sleeve material is Nikasil with a hardness of HV500~600 and thickness of 0.08 +/- 0.02mm. Cylinder material is JIS AC4B-T6 Aluminum with a hardness of HR65up. Includes piston (NA-40009H HYPERDRYVE) and Top End gasket set (NA-40009-BHK). Part number 56-K133.95.KIT. Cross reference ATHENA 98mm P400485100016.
- SKU
- 56-K133.95.KIT
- Brand
- Dirt Racing
- Availability
- In Stock (8)
FULL DESCRIPTION
BRONCO Cylinder Rebuild Kit for Yamaha YFZ450 (2004-2013)
Upgrade your Yamaha YFZ450's performance with this high-quality cylinder rebuild kit from BRONCO. Designed to meet or exceed OEM specifications, this kit provides a durable and reliable solution for your ATV's engine.
Key Features:
- Standard Bore: Precisely machined to a 95.00mm standard bore for optimal fitment and performance.
- High-Performance Piston: Includes a Hyperdryve racing piston, engineered for enhanced power and durability.
- Superior Construction: The cylinder is cast from AB4C aluminum and features Nikasil plated sleeves for exceptional wear resistance.
- Advanced Sleeving Technology: Utilizes Nikasil sleeves with a hardness of HV500~600 and a thickness of 0.08 +/- 0.02mm.
- Durable Cylinder Material: The cylinder itself is made from JIS AC4B-T6 Aluminium with a hardness of HR65up.
- Easy Installation: Most BRONCO cylinders are designed for a simple drop-in installation, typically requiring no case modifications.
- Compression Ratio: Achieves a standard compression ratio of 11.4:1.
- Complete Kit: Includes all necessary components for a comprehensive cylinder rebuild.
BRONCO cylinders are renowned for their excellent wear capabilities, ensuring longevity and consistent performance for your ATV.


