ok, so this is my first 2 stroke it is a 04 200exc and the previous owner did a top end rebuild right before i bought it (have the invoices to prove) and everything was great when i bought it. started first kick on 5 or 6 occasions throughout the day then after riding for 45 minutes or so it shut off and will not run. i replaced the spark plug, it has a new vforce 3 reed cage with good reeds, jetting was good while it was running, took off the carb and cleaned it just in case, kill switch is functioning properly. had plenty of power while running but after troubleshooting for a few hours i went to get a compression test kit. now the compression is reading 65 psi and the bike wont run. is there anything the PO could have messed up in the rebuild that would cause this issue? any help is greatly appreciated, im stuck here.