IMO you have enough compression for it to run @ 105psi.I got plenty with a lot less running & smoking!! If my engine just up and quit I'd be looking for a disconnected/broken wire or blown fuse.Do you check for spark?If no spark- I would check all my grounding wires first- put a jumper ground straight to the coil ground terminal,I'd make sure the electrical system is grounded to the chassis & motor via another temporary jumper. If you have spark then is going to be fuel related-carb/petcock/tank.
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