Namura Standard Bore Cylinder & Top End Kit for Yamaha YFZ450R & YFZ450X 95mm

Namura Standard Bore Cylinder & Top End Kit for Yamaha YFZ450R & YFZ450X 95mm

The Namura Standard Bore Cylinder & Top End Kit is a direct replacement top end assembly for Yamaha YFZ450R and YFZ450X ATVs, featuring a 95mm bore for restored compression and power.

Overview

The Standard Bore Cylinder & Top End Kit from Namura provides a complete top end rebuild solution for the Yamaha YFZ450R and YFZ450X. This 95mm bore kit includes a new cylinder, piston, rings, and gaskets to refresh your engine's performance. Designed for standard bore applications, this Top End Kit ensures reliable operation and easy installation.

Built For Performance

• High-quality aluminum cylinder with Nikasil plating for durability
• Precision-machined piston and ring set for optimal sealing
• Complete gasket kit included for a hassle-free rebuild
• Direct OEM fitment ensures proper alignment and timing
• Tested for consistent compression and power output
• Ideal for routine top end replacement or repair

Fits These Machines

• for Yamaha YFZ450R
• for Yamaha YFZ450X

On-The-Job Use

• Motocross and desert racing
• Trail riding and recreational off-road
• Sand dune and hill climbing events
• Competitive ATV endurance racing
• Engine rebuilds and performance restoration

Specs At A Glance

Good To Know

Q: Is this kit a complete top end? A: Yes, it includes the cylinder, piston, rings, wrist pin, and all necessary gaskets for a complete top end rebuild.

Q: Do I need to hone the cylinder? A: The cylinder is prefinished and ready to install; no honing required, but always measure clearance per manufacturer specifications.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.