Here is one more idea for modifying you Yamaha Mio. It comes from Ali Wardana, the owner of Oracle Modification Concepts in Jakarta.
Psst,… don't let anyone knows. It's engine has already bore up to 155cc. Ali says that it can run untill 140 km/hr. Ck ck ck … Thanks, Ali .. for this idea. You can submit your later concept to me to be listed here.