hi. Need help. We have a zip 2009 two stroke was riding and cut out out low on fuel.... fill with fuel but not start.. check plug and confirm ok spark cranked and confirm plug wet.. suspect flooding and after seeing issues with auto choke replaced carb for bigfer one to match exhaust. Still not running. Removed and and check rings again all ok but fitted a 70kit.anyway. still not start fuel air still present.... fit new red coil better spark but still not running... replaced pick up and stator and plug to emlinate all ignition sytem still nothing... Help needed please