It will be worn smithy, i take it the oil feed pipe is still connected to carb, as this would pull air thru, and give you a lack of oil too.
If it neeeds choke to idle, i would strip carb, and inspect,,this way all joints can be checked too.
As he says, get an eye test,, i"v followed drivers that brake as soon as an other car approaches , its dangerous .
i need glasses at night, what a difference they make too.
Its deffinatly that carb kim" the choke should kill it when warm,[ excess fuel] and having to spray to start cold, points to the choke system not working,
in the carb bowl, there may be a deep well, the choke pipe feeds off this well
I would go new on the battery, example last week a mates Z1300 ,turning over [ quite fast]- weak spark. not an offer, hooked up a big battery, bingo instant start,,
Ok , the more turns out = more fuel.. your having to screw the idle up to keep her running, all points to A.= pilot jet blocked,
or B. needs new battery,