I'm a 6 foot 160 lbs 18 year old and I've been driving a 250 kawasaki ninja for a while but the bike looks real small on me so I'm trying to upgrade and get a bigger one with a better exhaust pipe. I'm having trouble finding the perfect type for me, I'm looking for a 600cc sport bike that's lightwieght and something I can handle. I just need to know what bike should I buy.