main image GYTR YZ125 Performance Kit
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GYTR YZ125 Performance Kit

SKU #B4X-E9500-V0-00
The GYTR YZ125 Performance Kit is a comprehensive bolt-on engine kit developed to increase power and improve throttle response while maintaining strict Yamaha reliability standards.
Select a compatible vehicle


The kit includes:

  • GYTR CNC Ported Cylinder
  • GYTR Two Piece Head
  • GYTR Tuned CDI
  • GYTR High Compression Piston Assembly (two per kit)
  • GYTR Exhaust Valves
  • GYTR Jetting Kit 
  • V Force 3 Reed Valve
  • GYTR Silencer
  • GYTR Pipe
  • GYTR Carbon Fiber Ignition Cover


Note: Requires high-octane race gas or 91 octane or higher pump fuel 

  • Titanium / steel exhaust system
  • Yamaha recommended jetting specification
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
  • YZ125 (2022-2024)

Frequently bought with

GYTR YZ250F Performance Ported Cylinder Head Assembly
GYTR YZ250F Performance Ported Cylinder Head Assembly
Off-Road Radiator Guard
Off-Road Radiator Guard