I've asked this before, but I'm still unsure. I was going to get a bike before, but I used the money to invest in a new car instead. 
However, I'm ready to get a new bike. I used to ride a 110cc for motocross back in my youth. I've never sat on anything bigger than a 125 though. It's mostly all I've ever been around. I'm 17, 5'5" and weigh about 130. I'm looking for a bike that's fast, powerful, and not too easy to ride...I'd like to have a bike that's a bit of a challenge to handle so I can progress and learn to get better. I've always liked Yamaha, however I'm pretty open minded now, as long as it's not a 2 stroke. Any suggestions or advice, I'll totally take seriously.
However, I'm ready to get a new bike. I used to ride a 110cc for motocross back in my youth. I've never sat on anything bigger than a 125 though. It's mostly all I've ever been around. I'm 17, 5'5" and weigh about 130. I'm looking for a bike that's fast, powerful, and not too easy to ride...I'd like to have a bike that's a bit of a challenge to handle so I can progress and learn to get better. I've always liked Yamaha, however I'm pretty open minded now, as long as it's not a 2 stroke. Any suggestions or advice, I'll totally take seriously.