You start on the timming side do that piston first. Plugs out, fourth gear, rear wheel is your lever. Finger in the plug hole bump over the motor till you feel gas excaping around your finger.Let this happen twice in case you happen to be too far along when you start. Continue turning the wheel till you see the slot thru the hole, nice and slow if you go past back up and try again you need this lined up just right while turning the rear wheel in the normal direction. Ok now your 28 degrees BTDC for that piston. Because you have no gage on the primary side there's not a way to work out the math to get it to the 31 you need. So fit a degree wheel set it at 28 degrees to your piece of wire pointer. Your going to have to strobe to the degree wheel so get it snuged well. Still have to work the math to get to corrected 31 degrees. With the wheel in the way it's not posible to put on your marks to be used later. If I were you, buy one of the 720 degree wheels off Ebay fits on the cam now you can mark your stator and rotor for use later. Fabing a dead stop tool is in an earlyer post still a better way to get were your going I think. In any case you need the motor set at 31 so that you can get the range of the adjustment slots on the Boyer. Light timming to an inacurate mark is a waste of time. Can you temp mount your primary cover? It would help. You have to have a good mark at 31 to time it has to be right.