I just saw your comment on my blog post of Sam's bike. The bike itself is just a basic Mongoose from Wal-Mart. I bought the electric motor kit from here: http://www.werelectrified.com/ProductDetails.asp?ProductCode=BD24+Kit It's currently $300, but I only paid $150. That have sales at various times, so you just have to keep watching. It wasn't easy putting it all together, but so worth it now that Sam can actually use his bike.