After 2 years of research , I just bought my DRZ. I am useing my 2009 DRZ400SM as a commuter to work & back daily. Was wanting to get a smaller tooth (35 tooth )rear sprocket to cut RPM on speeds over 70 mph in 5th gear but canĀ“t find a supplier of anything smaller then the 39 tooth currently on the bike now. Any ideas where I can get a 35 tooth ? I was going to install a bigger front sprocket, but after pulling the cover I find there is no room for a bigger front sprocket so I must go with a smaller rear. Mike