I actually have something that would be perfect for you and I am looking to sell. it is a 2005 Yamaha XT225 dual-purpose and I have loved it. it was my first bike, never laid down, always babied. it is a 225cc engine and is a blast. gets around 70-80mpg and could carry my dad(5’11”, 230) or friend(6’2″, 190) with absolute ease. great for around town at lower speed limits like you specified but no good on the highway. I just want something with more power. suspension makes the roughest bumps feel like a gentle push and handles quicker than my friends ninja 250. just my 2 cents.