i,m not sure of sump depths of a bike engine in the chassis as i,m using the cvh engine but my sump( shortened sump) is level with the bottome edge of the lower chassis rails, although my gearbox bellhousing is 25mm below the bottome chassis rail,
from my experience of bikes ( ex racer...) the engines are very compact so i don,t think you,ll have any sump below the chassis & still have clearance under the bonnet, i,m pretty sure your zx9 engine won,t be any taller than my cvh engine.
that nose measurement i gave was taken from the engine compartment point of the nose cone NOT the front of the nose/car.
i try my best to help when i can
cheers
andy