This online resource library can answer most of the questions you might have. The library offers manuals, photos, videos and other useful information to help solve your issues and is organized by topic for quick referencing.
Simply select a category from the list on the lower right column. You can see the subcategories if you click on the arrows to the right of your category.
My handle bars are turning independently of the fork and front wheel.
Improper seating of steer tube.
This video explains the Bike Friday Pocket Bike stem and fork steerer tube interface feature which prevents the fork from rotating uncontrollably independent of the handlebars and stem. This video shows how this is accomplished and how to properly use the system.