How does operating a light bike compare to handling a heavy bike?
On extreme ends how does handling a light precision race-replica compare to an imprecise heavy touring bike?
What should a rider be aware of switching from one extreme of bike sizes to the other?
How does riding loaded change the handling compared to light and solo?
An interesting change occurs riding loaded or with a passenger. A bike becomes top-heavy with a separate mass that shifts with speed and direction changes. A passenger should be considered precious cargo and you're going to ride as safely as possible to keep everyone happy. With an untrained unfocused passenger or loose cargo the operator needs to compensate for any additional shifts.
Does compensating for a top-heavy shifting mass help riding solo and light?
For sudden changes in direction or speed a heavy loaded bike is going to handle poorly. If you have a passenger you probably want them to have a good time and that means removing any scares associated with riding. To avoid big shifts you'll pay attention to braking and accelerating rates and smooth shifting. For turning importance is placed on setting an entry speed and avoid changing your line mid-turn. With additional top-heavy weight counter-steering needs to be assertive and smooth as the bike can no longer be flicked.
Does the shortcomings of a touring bike, and the planning required to set speeds and lines for a heavy bike assist in being smoother on a light bike?
How does the inertia of a heavy touring bike in corners compare to a sport bike?
Overall changing bikes or bike conditions requires re-assessment of operations to find your comfort zone. Before trying a bike out that's completely different from what you're used to there should be expected margins to keep the bike in.
What should one be aware of riding a heavier or lighter bike?