I need help about which transmission chain to use on my bike CBR600FS 2002. I need new one. I´m chosing between DID 525HV and DID 525VM2, because I don´t know the right difference between them and which is better for my bike and my riding performance(I like fast and agressive ride, and racetrack is about 5km from my home so You know everything right know(no,no I´m not on the racetrack all the time, just a few houndred km in year). Do I need to change sprockets, they´re looking very good. I have 22000 km. If anyone can help me please post me the answer on my e-mail adress. Thnx