i got a same bike as you and have had the same problem when i was taking the gf on the back .but it does sometime ground out so bad it causes the exhaust downpipe to be pushed out of position and start blowing which is a pain .and once it caused the rear wheel to lift causing a small tank slapper .girlfriend shat herself and hasnt been on the back since
Paulfastbikes, what did you do to resolve the problem? Have you adjusted the suspension as suggested in this thread by others? If so did it work and stop the centre stand from scrapping the road?