@adrianlit: First, such high speed bikes and their needs and problems have been discussed to death, so before you continue, you need to read those previous threads for the info you want:
http://www.endless-sphere.com/w/index.php/I%27m_a_Noob_and_I_Wanna_Go_50MPH
THere's a lot of garbage in the threads, too, but also information you're going to need/want.
Next, realize that the battery you will need for that range at that speed is going to weigh more than you do, in all likelihood. It will also quite possibly cost as much as a car, or a new Zero motorcycle, depending on how you acquire it.
You should probably also read up on John in CR's threads about his bikes in Costa Rica, because some of them can go the speeds you want, though I don't know what range he has off the top of my head, or the size/weight of his batteries.
On my cargo bike, I have two packs totalling probably 40lbs, at a guess. Haven't weighed them recently. They only have enough capacity to move me *at most* 50 miles, and that is at <20MPH, and that's running them totally dead. If I needed to go that range at twice that speed, it'd probably take at least 3 times as much battery to do it (probably more; I'm just guesstimating from what I recall of other people's results--you'd have to read up on the posts about such bikes to find their actual results). But we'll be generous and call it only 100lbs of batteries, to go only 40MPH for only 50 miles. (it'll probably take more than that)
Since you want to go another 10MPH more, that will probably at least double the necessary capacity, so now you need perhaps 200lbs of battery. (keeping in mind that it's not just the extra speed that makes the capacity need increase, it's the extra battery weight/size itself that adds to this, so it'll probably be more than that).
To get the range you want, now you have to triple the capacity of the battery. Now you need 600lbs of batteries (and again, the more weight/size you add, the more battery you need just to move that weight and overcome the air resistance caused by the extra size, so again, you'd probably need more than that).
Assuming the above guesstimates are correct, you will not likely be able to that battery on your bicycle frame, unless it is custom made specifically to hold that battery, built around it. I could be wrong--but you'll need to do the math on your situation to verify. You might need even more battery than I think you will.
You'll want to use the simulators available on the web, including that at http://ebikes.ca/simulator , to crunch the numbers and see what capacity (Wh) you will actually need for your desired range and speed. While doing this, keep in mind also that because this bike will be heavy, it will also take a lot of power to get it moving each time you stop, or to go up hills, compared to a lighter bike. So it will also need more capacity (and more weight) to make up for that power to actually give you the range you are after.
Also, as you ride, your top speed will drop as the pack voltage drops, so you will need a pack voltage capable of moving you *faster* than the speed you actualy want to ride at, so that even when the pack is at it's lowest voltage near the end, it will still move you as fast as you want to go.
Also, if there is wind against you, or you have unexpected detours, you will have less range, so you want to size your pack's capacity to allow for that possibility, so you don't run out of range before you get where you are going.
Another thing to remember is that as the packs' capacity drops with age and use, you'll get less range out of it, and the top speed will drop quicker, so you need to size your pack's capacity so that it will still give you the range you need as it ages.
Typically I'd add at least 20% capacity for each of those last two things, but in your case that means quite a huge pack size/weight increase, and I'm not sure you will be able to fit that much on there, practically.
