Aiyaah ... buy NSR150SP laah ... cheap, powerfull ... honda some
more ...
If don't like cos it taxi bike, then respray all black (including
the skeleton frame), change both tyres to Dunlop TT900 (or make the
rear tyre even bigger, can or not?), make the rear suspension
higher 5-10 cm(can or not?), put rolling LED (like knight rider)...
then it looks very fierce... 
If all above can be done, maybe the bike won't as fast as original
SP, but "appearance wise" will be very fierce, anyway... got bike
super fast also no use in SG .. right? 