Can you make a 400ex kick start?

Yes, you can convert a Honda 400EX to a kick start, but it requires significant modifications. You'll need to source a kick starter kit, which typically includes a kick starter lever, gear assembly, and potentially a new case or cover. Keep in mind that this conversion can be complex, requiring mechanical skills and knowledge of the 400EX's engine system. It's often more practical to consider an electric start or simply maintain the existing system if you're not experienced with such modifications.