i started from 50cc scooter, mod to 70cc, changed to another scooter and was just going to do a 100cc swap yet i went to a CBR125 instead and ended up with 650R, I can say i wouldn't regret all these "upgrade" and at the moment i am even thinking to downgrade or sell my bike as I really can't afford the leisure ride more than once a month (and not like i can commute it daily as I do need a car or even a Van).