I have a 2004 kymco zx-50 would like to buy a kevlar belt for it does any one the part# or where I could buy one. My scooter is unretricted and would go about 47mph on flat I have lost power recently and can only get 40 out of it. compression is 140lbs belt is good cdi box is derestricted, carb is clean has anyone else had this problem? If so what did you do to fix it?