Namura Standard Bore Piston Kit Size B 96.96mm for Yamaha YZ450FX 2016-2020 97mm

Namura Standard Bore Piston Kit Size B 96.96mm for Yamaha

This Namura standard bore piston kit size B with a 96.96mm piston diameter is an aftermarket replacement designed to restore compression and power in Yamaha YZ450FX engines from 2016 to 2020, compatible with the 97mm bore specification.

Overview

The Namura Standard Bore Piston Kit Size B 96.96mm delivers a direct-fit replacement piston for Yamaha YZ450FX models 2016-2020. This piston kit includes the piston, rings, wrist pin, and circlips, providing everything needed for a top-end rebuild. It is engineered for riders seeking reliable performance and durability in their YZ450FX.

Built For Performance

• Precision-machined from high-strength aluminum alloy for reduced weight and increased durability
• Size B (96.96mm) offers a slightly larger diameter than standard to compensate for cylinder wear
• Includes matched piston rings for optimal sealing and compression
• Compatible with the 97mm nominal bore size of the YZ450FX
• Designed for 2016-2020 Yamaha YZ450FX models

Fits These Machines

• for Yamaha YZ450FX (2016)
• for Yamaha YZ450FX (2017)
• for Yamaha YZ450FX (2018)
• for Yamaha YZ450FX (2019)
• for Yamaha YZ450FX (2020)

On-The-Job Use

• Motocross racing and off-road competition
• Trail riding and enduro events
• Top-end engine rebuilds and maintenance
• Replacement of worn or damaged pistons

Specs At A Glance

Good To Know

Q: What is the difference between Size B and standard? A: Size B pistons have a slightly larger diameter than stock, allowing use in cylinders that have been honed to the next oversize to restore proper clearance.

Q: Does this kit include wrist pin and circlips? A: Yes, the kit includes the piston, rings, wrist pin, and circlips for a complete installation.

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