Keep in mind it will increase the draw bar weight by around 120Kgs, which will go on to the springs of the tug.
[pedant mode]
Actually, it will increase the weight on the towball by the weight of the bike, multiplied by the ratio of the bike's position between the tow ball and the trailer axle.
So if the bike is exactly half way between the tow ball and the axles, then half of the bike's weight will be added to the towball.
[/pedant mode]
I suppose you do own a DR400-ish thing, so 120kgs is probably a bit light on...
Seriously, it depends a lot on the tow vehicle and the trailer. Too little weight on the draw bar will cause swaying at speed (doesn't sound so bad until you experince it!), while too much will make the tow car handle and wallow like a pig (understeer, vagueness in the steering, very poor braking).
A mate used to use an EB wagon as his tow car - he took a set of bathroom scales when he loaded the rally car on the trailer, and always aimed for 80kgs on the towball. Even with a car/trailer that weighed more than the Falc, it always handled as you'd expect/hope.