Bought a project bike to share with my son, Front cylinder does not fire. Has 120 PSI Compression, fed fuel direct through carb, and it has spark at the plug. Timing looks right the rear cylinder runs fine and as I understand it there is only one timing device for the CDI modal so if the rear cylinder is timed so should the front. Timing light works fine on rear cylinder and I can clearly see the marks at 8 deg. The front is strange I can only get the light to work if I put the light pickup backwards. however when I do I get decent signal.I thought I would put out a feeler for some experienced advice. One further question when looking for an issue in the electrical I noticed reference to a "throttle switch" I have the plug for it but nothing plugged in to it. Am I missing something?