There's been issues with BRT. They can fail and kill engine while on track. Then you've 20 guys bearing down on you at 150mph+. They can also lose their memory and prevent bike from starting up.
Offset woodruff key on flywheel will let you adjust ignition-advance by +/-1 degree increments.
Easy way to change ignition-curves on new-gen is to retrofit various pre-gen ignition boxes. Look up the ignition-curves for each one and get unit that has curve you want. I spliced plugs from pre-gen onto my harness in Y-configuration so I can use either pre-gen or new-gen unit and switch between them easily. Prefer splicing in the '94+ ignitor plugs as colours match new-gen harness.
DIY - Replace the '08+ CDI (Ignitor) with the '88-94 CDI