If your planning your metruck build your gonna need to relocate your battery. In our opinion this is the best option. You can even mount your ECU to it. Be sure you check out our plug and play Metruck GY6 harness.
GY6 Ruckus engine wiring harness (20 min install)
PERFORMANCE CDI BOX GY6/QMB139 49cc 50cc 125cc 150cc 232cc
Scooter fuel and vacuum line kit
100 piece all in one solder joint kit