Hi guys, I am a newbie with scooters and bought a new R9 150 from a dealer in Beijing. For the first 5 minutes it was OK, then some funny grinding noise start coming from the back when accelerating. Not sure if this affects the performance because I haven't had an R9 before. For me it seems to be something to do with the transmission, clutch or chain. I went back to the dealer and he says the scooter is fine and the problem will go away in time but I don't believe it. Do you have any ideas?
Thanks,
Cat.
