I have this issue with my 08 gsxr 600... so when I am going 5-10 mph it does this little annoying thing (the bike starts shaking forward and backwards) like my whole body moves along with the bike and when I want to rev it to show off and I let go rpm goes down below 1,100 and goes back up to normal (1,600) this is not normal. There are sometimes that I down shift and bike feels like it's going to turn off when clutching. NOTE: I use my bike for like 10-15 minutes and everything is okay. This starts happening after that time.