I'm looking for a bike that doesn't exist..need help!!

[Jo_carter]

Hi
I'm new to adventure motorcycling but I'm really looking forward to it, this is where I need some help/advice from the experienced..
I am 5ft 4 & weight around stone 9.5. I've been riding bikes for 15years Honda CBR400 & my beloved Honda C90ZZ around the UK & Isle of man on standard roads,

I'm looking for a bike that is light, will cope with road,some off road and be OK for parts & have a some power.This will be my first trip on my own to South America with a motorbike. I'd like a bike I can be confident with & be able to ride it to it's full extent rather that it take me for a ride.
These are some of the bikes looked at and sat on & my feelings about them.
I'd love and suggestions.

Bikes I've tested:-
BMW650G / GS & Honda Trans alp
Too tall & too much weight for me..I wasn't happy.
KTM350
Weight OK, too tall I could just get one foot down leaning the bike at an angle.
Yamaha TW125
Great leg height, light, not great build so the write up's say, fiddly to fix, could do with it being a 250.

These are bikes I've seen but not tested:-
Royal En field 350 bullet - but believe the Honda CG125 has the same power. Could do with some more power
Beta Alp 350 - like the general look, not sure how reliable these are?
Honda XR250 - there not been one in any showroom to sit on yet!

I've got around £2000 to spend & I'm looking at a used bike that I will store in South America to go back to for the following years.

I'd really appreciate all the help an suggestions welcome.

Jo