Hi folks, New to site hi. My 20 year old daughter just bought a 2010 VTR 250 EFI. Rear rotor is at 3.9 mm and very ordinary. Trouble is all I can see online is the pre speed-sensor rotor being available. The speed sensor ring attaches to the rotor via another small 4 holes apart from the 4 large holes that hold the rotor to the wheel. Any ideas where to get one from online? Cheers Happy..