Is the www.bicycle-engines.com still active?

John,
A word of caution. Don't order from a supplier unless you can speak to them by phone. If they won't answer an email imagine what you'll encounter if you get a kit from them and there is a problem or warranty issue. We always suggest that after sale support is more important than initial price or claims of horsepower and speed. A seller that will not answer an email is a red flag. Stick to sellers who are accessible and who have a good reputation for customer support.
Tom