Well you got too big of carbs for pro circuit pipes, so you either need to switch pipes if you want a mid-top motor, or switch carbs if you want a low-mid motor. Pro circuits sign off at 8600 rpm, and with a 34mm carb they will never use the amount of air they can move. With 28mm tm mikunis you can use the smaller bore for velocity and better throttle response, and the ovrall diameter will be ok to 8600rpm where the pipes stop working. So you can run the 34's, but they wont run as good as the 28's will. For the riding you do, I would switch carbs and build a bottom-mid motor. A dune port is still considered more of a midrange port job we run pro circuits with 35mm 2 into 1 carb, and/or dual 28's on those port jobs.