I ride a yamaha majesty 400. I regularly ride over the blue mountains between Sydney and Orange - 260km approx with lots of hills.
1,the majesty has a very large storage space - fits 2 full face helmets - and top cases for the back are easy to get if you need more storage.
2,I weigh 110kg and it has easily enough power to stay above the speed limit throughout that trip. The max speed is around 169km/h. However is is no rocket from the traffic lights - from 0 to about 20 it is certainly ok but not like a geared motorbike.
3,I have averaged between 3.9 and 4.0 litres per 100km or regular unleaded.
4,Although many or most people on this forum seem to have Italian machines - or chinese / korean / indonesian ones, not many seem to have ones from the japanese motorcycle brands - I think they are a little more expensive however they have been making bikes by the million for a long time. The dealers and therfore service places are everywhere for yamaha & other japanese brands - I don't think there are many service places for the italian / chinese ... brands outside the major cities. I am in Orange and there are none here.
5, My scoot has an oil filter, sounds odd to say but some others only have a metal mesh strainer. I think that must effect the engine lifespan. Look at majestyusa.com - many of their scoots have over 80,000miles on them!
6, the big windscreen on the majesty means that if you are going over about 40km/h you do not get wet in the rain - except for the bit of you that is above the screen - I am 6'6 and for me, that is just my neck and helmet. The screen also makes the wind at highway speeds far less. One big bonus here which I didn't realise untill I tried a smaller screen is that the wind noise at 110 is much less with the big screen - that is fairly important to me.
7, look at www.burgmanusa.com too, the USA versions of the Yamaha Majesty and Suzuki Burgman are 99% the same as ours, except we get (at least for the majesty) the Japanese spec which means twin disc brakes where the yanks get a single disc and we get LED brake lights - there may be some other tiny differences too.
I love riding my majesty and it is big / long enough for my long legs which many others were not. Please ask any other questions you might have about the Majesty and I will try to answer