Carb crossover 1-4/2-3 or all4? Ivan's MB with full akra

[Falcon 269]

Honest opinion?  If Ivan couldn't tune out that dip in his bike's dyno chart between 4 - 4.5k rpm, odds are it can't be done.  It will be down to the design of the Akra full system.  There's no way he would have accepted that without trying all permutations of needle height etc.

No harm in you trying, though.