40255M09700 Wiseco Std Piston for Yamaha YZ450F FX 2020-2023 97mm 13.5:1

Wiseco Std Piston for Yamaha YZ450F/FX

This Wiseco Standard Piston (OEM cross-reference 40255M09700) is a 97mm, 13.5:1 high compression piston for Yamaha YZ450F and YZ450FX models from 2020-2023, built to deliver strong top-end power for motocross and off-road use.

Overview

This Wiseco Std Piston for Yamaha YZ450F/FX gives riders a high compression replacement piston for 2020-2023 machines, referencing 40255M09700. With a 97mm bore and 13.5:1 compression ratio, it supports sharp throttle response and reliable performance in the YZ450F and YZ450FX engine. It suits racers and mechanics performing top-end rebuilds or performance refreshes on compatible models.

Built For Performance

• 97mm standard bore piston sized for the YZ450F/FX cylinder
• 13.5:1 high compression ratio for strong combustion efficiency
• Forged construction for durability under high RPM use
• OEM cross-reference 40255M09700 for easy verification
• Standard profile designed for direct-fit rebuilds
• Built for Yamaha YZ450F and YZ450FX 2020-2023 engines

Fits These Machines

• for Yamaha YZ450F 2020
• for Yamaha YZ450F 2021
• for Yamaha YZ450F 2022
• for Yamaha YZ450F 2023
• for Yamaha YZ450FX 2020
• for Yamaha YZ450FX 2021
• for Yamaha YZ450FX 2022
• for Yamaha YZ450FX 2023

On-The-Job Use

• Top-end rebuilds on YZ450F motocross bikes
• Off-road and trail riding on YZ450FX models
• Performance refreshes after piston wear or ring fatigue
• Race prep and engine maintenance for compatible years

Specs At A Glance

Good To Know

Q: Will this piston work in my YZ450F or YZ450FX? A: It is designed for Yamaha YZ450F and YZ450FX models from 2020-2023 with a 97mm bore. Confirm your model year and engine specifications before ordering.

Q: Does the higher compression ratio require fuel changes? A: A 13.5:1 ratio may call for higher-octane fuel depending on your setup and tuning. Check your engine builder's recommendations before installation.

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