i just bought this 1984 husqvarna wr500. i got a used mag/flywheel off a 1984 cr? 500. same engine. but different mag/fly. my problem is it will start and fly down the road if i pull start it. but when i go try and kick start the thing it will not start. evan after it is wormed up it still wont start. does anyone know why it would do this????