If you are looking for a really nice non lockable gas cap for your Honda Ruckus, this is the ticket. Great quality!!!
GY6 Ruckus wiring harness (20 min install)
PERFORMANCE CDI BOX GY6/QMB139 49cc 50cc 125cc 150cc 232cc
Scooter fuel and vacuum line kit
How to build a GY6 Honda Ruckus FULL VIDEO