Motorcycle carrier for Jumbo Transit

[Markgsx]

Isn't there a "nose weight" on tow bars? Something about the weight directly down on the tow bar from above. Seem to remember a car I had could only take 90kgs striaght down so I didnt bother as most non competion bikes of reasonable power weigh more than 90kgs.

its something I have often thought about as carrying my bike on the back would be easier than chucking it in the back when Ive got it in "camping" mode, by camping mode I mean staying in it, not walking round in a funny style.