hi all iv got a kh 24 and i am about 205 pound what tyre pressure should i have in
just enough that it doesn’t hit the rim, its a personal thing, you really have to play with what you like. 
are you riding road or muni?
on the park on grass hopping on and off small walls so far iv got 20 in it at the mo
A. Enough to keep your rim off the ground.
B. From there it’s personal preference
C. If you need more info check the million other threads that cover this exact topic in more detail. Also note that a question about something like tire pressure cannot be answered if you don’t tell us what you’re using it for.
its all personal preference - there is no ‘one answer’…