First off, thank you for purchasing one of our flywheels but the 6619 is not designed to fit a Predator 212cc engine. It is for the Honda/Clone 196/200cc engine. Depending on which Predator you have you will need a 6625 (non hemi) or 6626 (hemi). Now on a red plate with a after market air filter, adapter, blue printed carb and header we usually run 37/38 degrees timing with a .070 coil gap. If using stock air box, carb and muffler run it with a stock key (32degrees) with a .070 coil gap.