@silver_hawk : Welcome to Karachi, which area will you reside and which will be your official area?
Honda 125 bikes are hot favorite item for being theft and snatched.
Leave your bike at Lahore, why to take risk of bring it at Karachi?
Buy some 70cc (Unique etc) and cover it with cloth to be in safe side. But if you want more powerful bike, I will suggest Ravi Piago / Suzuki GS.