Stater unable to turn when switch been set. - 2002 kawasaki VN 800 Vulcan Classic

Stator that produces power - doesn't turn, the rotor turns with the cranckshaft around the stator.

Starter that turns the motor over - has a solenoid .
First check that the battery is fully charged and the cables are tight then check the fuse in the top of the solenoid, if there isn't one then check the inline fuse that goes to the solenoid. replace if bad. start it.
Second if the fuse is good , jump the solenoid with a screwdriver or two and see if the starter turns over. if it does then your solenoid is bad. replace the solenoid. start it
if it doesn't turn over, remove the starter and have it bench tested, if it is bad, replace starter.

If the starter is good then.......

Put the bike in 5th gear and try to push it and see if the motor turns over.
If it does, try to start it again with the starter. i had an old Goldwing that was sitting and the starter couldn't turn the motor over until i broke the motor free.

if you cant break the motor free, its seized.

I beleive that its either the fuse or solenoid.