Universal Adjustable RPM Speed Limiter With Off Switch For SMT ROLLER QMB139 GY6 Engines Rotation Speed Controller

Adjustable speed limiter with off switch functionality.Red wire connects to the corresponding red wire between the generator and unit.Black wire connects to ground.Toggle switch is designed for installation within the cockpit.Compatible with various 50cc to 150cc scooter models equipped with QMB139 or GY6 engine systems.Designed for straightforward integration into existing wiring setups. Disclaimer: This is an aftermarket spare part.Trademarks are used only to specify compatible devices.

• Compatible with SMT ROLLER QMB139 and GY6 engine models for broad scooter and moped compatibility
• Adjustable RPM control allows precise tuning of engine speed for optimized performance
• Integrated off switch enables quick deactivation of speed limiting function when not needed
• Universal design fits a wide range of 50cc to 150cc 4-stroke engine applications
• Simple wiring setup supports easy installation with standard connectors and protection