curious about rpm limit

[spye@hvgb.net]

Quick question folks, I'm running a 16t countershaft sprocket, stock rear sprocket, stock carb/intake and Cobra exhaust. I can't seem to push ol'betsy above 6000-6100 rpm at WFO. Anyone out there with a similar set up? What rpm you making flat out? I'm saving pennies to buy a carb jet kit but wondering if this is all the klr's can pull under normal circumstances. Steve Pye A7