well with the right stuff anytings possible....nah jk yeah its possible. have you seen vids of old briggs with kick starts? you would have to do some thing like that.
What engine is it?
Im sure if you have the equipment and put enough thought into it, it will work out.
I know you can turn electric start (starter motor) quads into a kick start, Yamaha has a kit for the YFZ 450.