Kick start conundrum

Hi I have a problem with kickstart on series 2 LI150
The kickstart seems to have seized e.g. won’t kick down. I took the chain case off and all seems to be OK. All the gear cogs turn and when removed you can depress the kick start fully.
Put back on without fastening properly and you can depress the kick start and it turns the engine over.
Now I fasten the chain case back on correctly and the kick start is siezed again, any ideas?
Neil
The kickstart seems to have seized e.g. won’t kick down. I took the chain case off and all seems to be OK. All the gear cogs turn and when removed you can depress the kick start fully.
Put back on without fastening properly and you can depress the kick start and it turns the engine over.
Now I fasten the chain case back on correctly and the kick start is siezed again, any ideas?
Neil