HI,I AM HAVING A PROBLEM WITH MY TRANSMISSION OF MY KYMCO DIK 150.IT IS 2 YEARS OLD- 5000 KM AND ALWAYS WHEN I REDUCE THE SPEED BECAUSE OF THE TRAFFIC AND PUSH AGAIN TO ACCELERATE I FEEL SOME STRIKING FOR A SECOND OR TWO.IS THIS A COMMON PROBLEM FOR BIG SCOOTERS OR WHAT.THANKS FOR THE HELP.