Thanks diarmaid_h
I have been up some really steep hills and it goes ok. It does feel a bit weird to pedal but it wasn't a concern. On a fresh charge she is great fun to ride, It quite stable and you can go around corners pretty laid down. It definitely more of a cruiser.
I designed this as an electric motorbike really but school was worried i'd sue them if I hurt myself so I told them I was going to make a "pushbike" instead. My teacher was cool with it but as far as administration knows the big black thing in the front wheel is a "hub brake" ahahah. 
Having pedals has the advantage of appearing like a push bike if an officer of the law goes past me too ;) We have a 250w limit on electric bikes in Australia, which I think is f***ing ridiculous
I'd always planned on a bigger motor and better batteries but towards the end it was turning into a money pit. It will happen when time and money permits.

Yeah the price certainly does exploded. I have already designed its big brother, intended to be a proper motorcycle so I wanted fast with long range. I spec'd it on the extreme end but the whole package was going to leave a 30,000(AU) dollar hole in my pocket. 20,000 for the motor and controller (it was a 150Kw motor) and about 10,000 for the batteries necessary to power it ha. It was just a pipe dream, I don't even know if the batts would fit in the frame. I'd still like to build it but maybe around 100hp motor would be more realistic.

Thanks for the interest. I was being pretty broad with the term "motor and controller" I suppose.
What you describe would be great for a electric push bike but if you want decent automotive type controllers they do cost that much. What you missing is all the other necessary systems that these controllers have for automotive applications.
You'd get a battery managment system to control/monitor/recharge your cells properly, various input output controls to run and monitor water or oil pumps for the motor etc, programmable acceleration curve computer, data logging, output for your digital dash board, usb interface so you can access it and change it all. There is an AC invertor in that price too.
Plus you get the extra efficiency of a controller that has been designed, tested and improved over many years of RnD conducted by professionals.
Not to mention I don't have the technical skills to build any of these extra system you get. Even if I did it would take you ages, cost more than 10k to develop you're own. 10k is on the high end, you can get much cheaper controllers 3-5k.

It'll do about 15 - 20kms on a charge, I'd always intended on L-ion's but I didn't have the cash.

Hi Conel. It would probably be easier if you PM me about what exactly you want to do rather than have the discussion here. Cheers

Hey ironsmiter.
The bike never would have turned out as good without the newkeys!
I used the C3620PF Controller from http://www.ebikes.ca . I got their cycle analyst computer with it too.

 Thanks Vidar.
I completely agree! And when the lathe starts to scare you, you know its time to pack up for the night :0 Ha!

-Edit The controller I actually got was the C7220PF

Thanks PKM
The kit I got originally was about $400 Australian. That was motor, controller, crappy battery meter and throttle. The batteries were $80 each X 3
The controller blew up on the second test ride so I spent more money getting a new better quality controller and I also got the cycle computer that plugs into the controller too. They were about $130 each from http://www.ebikes.ca

The cycle computer is optional but it is way better than the three led battery meter you get with this kit. It gives you speed, AmpHours used, Watts used, Battery Voltage, Kms travelled, % of Regeneration to the batterys, the list goes on.