Open up the top needle an additional 1/2 turn (main jet) and see what it does, it sounds lean.
You could have a point gap problem too.
And how are the plugs?
good fuel?-- old? has it been setting?
if it is your lucky day and all the stars are aligned you might get the carb off and cleaned up with damaging a gasket (s)
A couple of gaskets and needle seat is maybe $12.00 or so.
Down load the free service manual on here in tech section,-- lots of what you gonna need now and later.
Edit: you guys type faster than me.
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