I would suggest you to not go in for superficial changes in the bike. There's no point getting an additional exhaust (fake) or handle bar changed. This would not only compromise safety but may also reduce the overall life and driveability of the bike.
If you indeed want to modify your bike, go in for actual modifications that would not make your bike look "cool" but would give you performance advantages. Although I'm not sure if its available for your particular bike, but search a bit for air filters, HIDs etc. Also, you could get your tyres changed to Zappers or similar ones that would give you a better grip on the road.
Back in the day, when I had a bike (CBZ), I made a lot of superficial changes that ended up making me invest a lot more in maintaining them. I had got my stock handle bar removed and replaced it with a straight Bullet handlebar. I had removed the "saree guard" to make the bike look cooler but that made it difficult for women pillion riders to board and sit on the bike. Overall I feel it was not worth the effort to make the bike look cooler with these changes, instead it would be much better to invest in a better lighting system, tyres and other equipment like helmets, riding jackets and knee guards etc.