KTM 390 & Triumph Street Triple Motorbike, Non Starters, Why?

We investigate why this KTM 390 & Triumph Street Triple motorcycle won't start. They both seem to be suffering from the same problem, which is very unusual!
Below are links to some of the tools you will see us using in our videos:
Chain Alignment Tool
www.amazon.co....
Milwaukee ½” Impact
www.amazon.co....
Wurth Spray Pump Bottle
www.amazon.co....
Universal Fork Seal Driver
www.amazon.co....
Oil Drain Pan
www.amazon.co....
Magnetic Bowls
www.amazon.co....
Magnetic Pick up Tool
www.amazon.co....
Seal Pick set
www.amazon.co....
Kneeling Mat
www.amazon.co....
Rear Paddock Stand with Forks
www.amazon.co....
Rear Paddock Stand Cradle Adaptors
www.amazon.co....
Front Paddock Stand
www.amazon.co....