I'm guessing that anything over 2 weeks rental it probably makes sense to ship your own bike over...but I haven't done the math that closely yet.
I’ve done it six times and it’s always at or around AUD 3,500 return.
I am over there for 6-8 weeks so that’s a lot less than renting, but IMO the real benefit is the memories and history that your bike ingests.
Like this..





Or this..





And a hundred shots in between each of them.
I reckon if you leave the bike behind that you did the trip on, you leave half of the memories behind with it..
Based on the costs of renting, any more than a week or two over there and it’s a no brainer..
Take your own...!