Further to Islandboy's spot on comments.
Don't be spooked off by the power and weight difference.
Your 500 is a 27 degree steering angle bike with 113 mm of Trail.
These are REALLY "slow" numbers compared to the nimble yet rock steady 25/98 of the 919.
Both bikes are on 17 inch wheels, so that aspect will be a wash - aside from the 919 having bigger tires with more carcass compliant taller sidewalls.
The 919 is nominally 80 pounds heavier.
I'll bet you will be shocked at how easy the transition will be, wish you'd done it years ago, and actually find the 919 to turn tightly, such as intersection rights from a dead stop.
You'll notice a huge increase in torque down at low revs, but your right hand controls that totally.
Said torque will also be very smooth, due to the fuel injection as compared to the carbs of your 500.
A CAUTION though re tires.
If it is a low mileage bike they may still be original if which case I would suggest them as being aged out and up for replacement, no matter how much tread they have.
Regardless, don't run them as the Honda suggested pressures which are nothing more than liability based numbers based on theoretical maximum tire loads and max allowable GVW.
32/33 front and 35/36 rear cold settings is what I would suggest as your starting point.