Hi Kirby,
What motor wind are you running, and what speedo?

Generally it's best to let the speedo do all the timing, and only advance the motor if you need more than the speedo can provide.

Best rule for timing and different motor winds:
The higher the wind (21.5, 17.5) the higher the timing they can handle
The lower the wind (3.5, 4.5) the lower the timing they can handle.

On the V3 motors, the sensor unit is pressed in place by a silicone gasket. If you loosen the three main motor screws, it releases the pressure and you can rotate the plastic sensor socket within the rear endbell housing. Then tighten the main screws back, and done.