1981 ds125 HELP!

[kapton murka]

I got this 1981 ds125 not running really at all. i put some time into it and we have it running now. the problem i am having though is it will only push start, and it revs in neutral fine but soon as you put a load it dies and bogs out.  

 

things i have done.

brand new carb

checked the reeds

mixed my own oil 32:1

blocked the oil pump

checked the compression it has 120psi

exhaust is clear 

new spark plug

 the only thing is the piston has some scoring but it still has great compression

 

im lost at the moment.... help?