While Dave’s “Optimum Handling” line may or may not be helpful, his explanation of forces in a turn could be down right dangerous, if someone where to depend on it:
Because the bike and rider are leaning, the rider’s weight is being pushed outwards and downwards by centrifugal force, thereby actually pushing the tires down onto the road, which increases traction.
Yikes! If only that were true.
The sad fact, however, is that the centrifugal force is perfectly parallel to the pavement, and so can contribute nothing to the force of the bike onto the road, and the lean angle of the bike and rider has nothing to do with it.
Instead, the centrifugal force must be resisted by the available friction between the tires and the pavement, which remains the same whether the bike is leaning or not.
I’ve posted a comment for Dave on his blog, and perhaps he can correct this mistake.