It can be done. Try it and let us know what you find!
I have tried a bit larger and smaller volume in the stock airbox (up to 50% of one cylinder, larger and smaller), and the stock airbox is good for the stock cam timing and cylinder volume.
The airbox acts like a tuned plenum - because it is. The only bikes that benefit from airbox removal are those that (like the R3 and Bonnie) that do not have a correctly sized plenum.
Google "Helmholtz tuning" and "power".
I have tried a bit larger and smaller volume in the stock airbox (up to 50% of one cylinder, larger and smaller), and the stock airbox is good for the stock cam timing and cylinder volume.
The airbox acts like a tuned plenum - because it is. The only bikes that benefit from airbox removal are those that (like the R3 and Bonnie) that do not have a correctly sized plenum.
Google "Helmholtz tuning" and "power".