i am asking here as this board has a broad knowledge base ,please be gentle.
well i got a basket case 89 fzr1000 that hasn't run since 2000.
i stripped the carbs replaced the jets,diaphragms and o-rings,fuel pump/filter cleaned the choke plungers and circuits.
and fresh gas and it will only start after a shot of carb starter .
once it has run once it will happily start on the button with the filters in place

.
i was advised to check the valve clearances(exhaust were all good but inlets appear tight) a bugger to get to
would that cause hard starting ?
i will do a compression test now i have had it running a time or two
thanks mark