125cc Sports Bike, 17 Years?

I Am 17 Next Month. I Have A Gilera Smt 50cc. I Am Looking At The Yamaha Yzf R 125cc. I Am Looking For A Sports Type Bike Simular To The Yzf, Cbr, Nsr. Which One Do U Think S Best.

Also Is The Rs125 That Unreliable! I Hear Loads Of Maintaince Is Needed, Is This True? I Know There Faster Cause There A 2 - Stroke. I Would Prefer A 4-stroke As The Ones Above. Oh An It Has To Be Road Legal, As Im Using A Road Bike.

Thanks.