The red wire w/fuse to the battery side of the solenoid is correct. Is there a reason you haven't bought a new battery? Cheapest trouble-shooting method would be putting a new battery in it before testing for other issues. The flywheel magnets may be weak causing the pulse generator not to produce the needed voltage for the CDI to fire the coil, that's why it runs w/jumper box- the box is providing the 12vdc. Does the buggy have working lights? If so- after installing a battery you can see if it will run right with the lights on.That's just a simple test to see if the stator is working at all.
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