Maxipad will be your best help here, and I just found this video
The above video is from a guy who rode a CT-70 replica (Chinese 125cc knockoff of the Honda) from San Francisco to New York City with his son, who was on a 150cc BMS scooter. If you remind me, I can try to find the advrider.com thread, which is an interesting read, but not much help to you in putting your Vader together