hello. I have a stage 4 mini bike. i had it sit for a week, and when i tried to start it, nothing. pulled the plug and there is zero spark. I suspect the coil. the plug looks great. my coil is an aftermarket coil with an msd wire. the coilgap looks good and the magnet is pretty strong (im running an arc billet flywheel with 32 degrees advance). is there anything that could be the culprit other than the coil?