Motorcycle Repair Questions? Ask a Mechanic ASAP
Welcome, Please work with me to get the answers you need.
Have you tried turning the motor by hand, the kickstart sounds like it is working. It should only grab when the brake lever is pulled in and slip when the lever is out. That is it's normal operation.
If the kickstart lever is not going down with the lever pulled then the engine is not turning over. It may be seized.