[Masteryota]

Work on getting the engine running in top form, then look at the CVT. The CVT relies on the engine to make the correct speed and torque for it to properly engage and disengage. I would check the valve clearances next, and check the intake boot for cracks, both are known issues with that style engine. While you are there, make sure to clean the carb THOROUGHLY, paying attention to the pilot jet and circuit.

You may need to improvise if the air cleaner is that bad off, disconnect it and see if it improves any. If it is decent shape, and it is the model I am thinking, then it isn't a bad price, but about par for a non running utility vehicle.