The 250F is the fastest stock 125 you can buy or get. Im only 15 and Ive owned the bike for about 11 months now, 02´ model, and of all the 125 Ive raced on the track, Ive beaten. My friend owns a RM125 and it has almost everything done to it and I still kick hes ass...and he spent all that money while mines still stock.