electric motorbike/scooter conversions

So have been chasing the elusive electric motorbike/scooter scene for a bit now and I remember hearing on one of HB's live vids that he is going to try to make a electric pitbike .

But as a start here is a easy buy and install for all the mechanical bits.http://www.cnqsmotor.com/en/article_list/Mid%20Drive%20Motor/107.html

only thing is the unsprung weight will be high but will leave tonnes of room for batteries.

The I have also some (90+) Samsung 30Q which I am testing by Charging, de-charging (measure capacity they give) and charging them again. After a month I will check them how much they will fall. Love to start using them for an electrical motor bike. For which I need a ten fold (10 kWh or more). Here also the same issue: do I start with single 1kWh (7S14P) packs with each their own BMS, or do I build one big pack with one large BMS?

Definitely still want to do this project - AFTER I get the shipping container idea out of my head.