Here's my video on positioning on the bike, how it fits into the system of bike control and what is required if you want to pass an advanced bike test.

Other relevant videos:

Positioning for Corners (1):    • How to Pass an Advanced Bike Test - C...  
Positioning for Corners (2):    • Cornering Part 1 - Positioning  
Positioning for Safety:    • Positioning for Safety on the Bike  

For more information on advanced & performance riding & driving, visit my website www.reglocal.com & give me a follow on Twitter @RegLocal