CITY WEST YAMAHA
The PowerCore®4 is designed to increase the horsepower and torque throughout the entire power
curve and give you a noticeable power increase that is very usable and beneficial, no matter your riding style or ability.
• Space age internal packing for maximum packing life
• High-flow modular end cap
• Internal core shape uses high-flow technology.
• Enhanced sonic evacuation for higher flow and increased power
Muffler includes removable spark arrestor. 97.5 dBA sound level. 95.5 dBA with QuietCore™
Spark Arrestor Insert, sold separately.
This accessory is restricted to closed-course competition use.
2018 – 2019 YZ450F
2018 – 2019 YZ450FX