HI. I HAVE A 1990 ZZR600 WHICH I AM HAVING RUNNING PROBLEMS CAN ANYBODY HELP!! THE BIKE STARTS OK REVES BUT WHEN I RIDE THE BIKE THE PROBLEM STARTS, COME TO A ROAD JUNCTION OR ROUNDABOUT THE ENGINE HAS A FLAT SPOT WHICH MAKES THE BIKE UNSAFE. I HAVE HAD THE CARBS CHECKED AND BALANCED ANY IDEAS??