Crank sprocket won't budge

Disassembling a bike that has sat with it's primary cover off for a long time. Got my puller on the crank sprocket and it won't pop. Tried my MAP torch on it for a good long time. No go. Any ideas?

Keep it up. Puller on, heat the sprocket to 300, tap the push screw with a hammer.
Repeat. Drink a beer. Do it again.
It’ll come.

If you can beg , borrow , rent , ( buy but very expensive) an induction heater that should do it . If you are not familiar with these they have various size cables you wrap around nuts , studs ,bearings etc. The beauty of these is they concentrate the heat on the part you are trying to expand whereas a torch heats both the pinion and the shaft.

Got it. Refered to the shop manual and they said to give the outside edge of the sprocket a "sharp blow" with a hammer and drift to break the taper. Imagine that, reading the instructions worked.

When in doubt, read the book ? - It is something I never do. Instructions are for other people.