Namura Standard Bore Size A Top End Repair Kit for Yamaha YZ450F 2010-2013 97mm

Namura Standard Bore Size A Top End Repair Kit for Yamaha YZ450F

This Namura top end repair kit includes a piston, rings, wrist pin, and gasket set for rebuilding the cylinder of Yamaha YZ450F models from 2010 to 2013 with a 97mm bore.

Overview

The Namura top end repair kit provides all necessary components for a complete cylinder rebuild on Yamaha YZ450F motorcycles between 2010 and 2013. Designed as a standard bore size A kit with a 97mm piston, it restores compression and power. This top end repair kit is ideal for riders needing a reliable replacement after wear or damage.

Built For Performance

• Includes forged piston for strength and durability
• High-quality piston rings for proper sealing
• Precision-machined wrist pin and circlips
• Complete gasket set for a leak-free assembly
• Manufactured to OEM specifications for exact fitment

Fits These Machines

• for Yamaha YZ450F (2010-2013)

On-The-Job Use

• Motocross track riding and racing
• Off-road trail and desert riding
• Engine refresh after high-hour use
• Rebuilding a seized or worn top end
• Performance rebuilds for competition

Specs At A Glance

Good To Know

Q: What does 'Standard Bore Size A' mean? A: It indicates the piston is at the standard factory bore diameter of 97mm, corresponding to the first oversize designation for normal wear.

Q: Do I need additional gaskets or seals? A: The kit includes all necessary gaskets for the top end rebuild; however, you should check your cylinder head and base gasket surfaces for reuse compatibility.

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