It's all very interesting but is it commercial.
From my hard earned 6 years experience of selling e-bikes I have the following comments.
UK customers expect to get a complete bike,that is with mudguards,lights,kickstand....it rains and gets dark in the UK !
UK customers like to go to a local dealer to try the product,a dealer chain is necessary unless you are very cheap,when they will take a gamble.
UK customers don't usually want to spend more than £1000 on an e-bike,they will in smaller numbers go up to £2000, but that product has to be an established brand like KTM or Kalkhoff,£3000 plus e-bikes are a very rare sale.
UK customers want a product and want it now,the idea of pledging a deal is a turn off for many,younger people are more attracted to Kickstarter projects but younger people in the UK are cash strapped and not normally the buyers of e-bikes.
We have seen some nice sport style e-bikes presented to us on this forum,like the Coboc and the Freigeist,but at £3000 plus are they value for money? Have they sold any?
Germany may be a more receptive country to your Kickstarter project,it has a more established electric bike market which has matured into the desire for more expensive bikes. I noticed that the Coboc has a fully developed dealer chain,you will be expected to offer a margin of minimum 30% to the dealers. Holland is a big e-bike market but too traditional for this product.
Just my tuppence worth,I don't agree with Trex that you need £500k to get such a project away,it can be done with £100k but you do need a unique product and the help of a dealer chain,that depends upon your salesmanship skills.....why not present your prototype to the Coboc German chain,their dealer list is on the web....you need to do the legwork but you say you are passionate about your product,you need to assure that others share your passion before robbing the kids piggy bank.
Good luck.
Dave