Kawasaki Z125 Performance Engine – Ready to Install
 
Transform your Z125 into a true mini-moto powerhouse with a fully assembled, tested, and ready-to-install performance engine.
Perfect for street riders, stunt enthusiasts, and track-day mini racers who want stronger acceleration, better mid-range pull, and long-term reliability — without the hassle of sourcing parts or building an engine from scratch.
This is a complete performance engine package with all parts and labor included.
 
Unlock the Full Potential of Your Z125!
Available Options & Performance Characteristics
155cc – A strong, responsive upgrade ideal for everyday riding and spirited commutes. Smooth power delivery and excellent reliability.
177cc – The sweet spot for riders who want noticeably stronger acceleration, better climbing power, and increased punch across the rev range. Additional machining needed
194cc – Maximum-performance setup for riders who want the most aggressive torque, fastest throttle response, and track-ready engine behavior. Additional machining needed
Each setup can be configured in a race-ready version depending on your needs.
 
Why Choose Our Z125 Performance Engine
Significant performance upgrade over the OEM engine
Professionally built, assembled, and tested under one roof
Zero hassle — one complete product, fully ready to drop into your bike
Precision machining and proper clearances ensure smooth operation and long engine life
No need to chase parts, solve compatibility issues, or redo labor multiple times
Built with reliability-focused components for both everyday riding and track use
 
Close course competition only. Not street legal. Not sold to California residents. Intended for off-road, track, or race use where permitted.