THEY R RESTRICTED TO LIKE 33 MPH (TAKES AGES TO GET THER TOO) BUT ONCE THERE DERESTICTED ITS A DIFFERENT STORY THEY GET TO AROUND 50 MPH BUT THEY GET UP THERE A LOT QUICKER I THINK IF U PUT A LEO INCE EXAUST ON IT WITH BIGGER JETS IT WILL DO AROUND 60MPH 65 DOWN HILL =] THERES ONLY ONE PROBLEM ..... THE SPEEDO ONLY GOES UP TO 50 MPH SO I DONNO WHAT TO DO WITH MYNE AS MYNE IS STILL RESTRICTED I DONNO WHETHER TO GET THE LEO VINCI EHAUST OR TO JUST DE RESTRICT IT