The above link explains how to go about checking for whatever that is missing causing the non starting.
Has the valve and ignition timing been installed correctly?
Have you checked the compresion?
Feb 21, 2011 at 1:55 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.