Your trailer will come with a recommended tongue weight rating when full loaded. Simple mathematics will allow you to calculate what the busa weight is in comparison to the trailer load capacity. Once you have a percentage of the bike to trailer load capacity, you can load the busa in the trailer and with a scale under the tongue you can move the bike back and fourth until you find the position in the trailer that gives you the calculated tongue weight.
If you don't want to go through all that work, you can load your bike in the trailer and if you are still able to lift the tongue but not to the point of having the trailer fall back on its tail, you are close enough to consider it balanced for hauling.
I have set up and run trailers both ways for over 20 years and have never had a trailer load fail me. The main point...do not exceed the tongue load that the trailer is rated at. Doing so can potentially put you in excess of the material strength of the trailer.
Good luck and let us know what you end up doing.