Simple indication that there in the ball park is at tdc (and check your crank sprocket is fitted dot to dot on pre 05 bikes)
the fine line on the camshaft at the sprocket end , on the exhaust should be pretty much parrallel with the gasket surface of the head facing forward
and the inlet should be angled up slightly from the gasket surface facing back
remember there are 2 tdc when your working with cams , if its at the wrong one rotate another 360 crank degrees
I used to know the lift at tdc , which is another simple way of quick referencing, but can only remember my 750s , if i find the busa i will post