05 450r. Factory everything except for slip on pipe. Quad ran perfect except for gas running out the overflow nonstop. Had carb rebuilt by a shop. They gave me balls out racing rebuild kit. I installed the carb back on the quad. It fires up easy revs up quick an easy. When I go down the road from gears 3-5 it cuts out before I max out almost like I'm hitting a rev limiter. 5th gear will only go half throttle before it cuts out. My mechanic said adjust the needle. I have an it made minimal changes. I have fuel mixture screw at about 2 1/2 turns out. Still does it. I'm lost can anyone guide me in the right direction? Thanks.