All that and I forgot to answer the question... I ramble sometimes.
You want less teeth in the front sprocket and more teeth in the rear for torque. It works the same on bicycles, minibikes, gokarts and any other geared contraption you can think of.
For an automatic CVT setup you would change the sprocket that goes from the CVT unit to the rear sprocket. Changing both sprockets makes a big difference with them. It did on my minibike. My minibikes torque converter (Tav2 Clone) did have a spring in the rear pulley that could be set for more torque or more speed along with a middle setting.
That adjusted the tension on the spring to change the rate the pulley opened and closed (shifted) Not sure if the CVT has that option on yours. Might be possible to get a heavier rated spring though possibly.
You will lose top speed if you go this route. If you don't go full open throttle and keep it there its not much concern. You will still have plenty of top end speed to get around.