Pierre Ethier's General 2-Wheeler/3-Wheeler home-index:

General Index of the present 2-Wheeler site:

1. The new Torso-Arms-Handlebar steering theory:

1.1 The Torso-Arms-Handlebar mechanism

1.2 Where stability comes from at slow speeds

1.3 Three steps when going into a turn

1.4 The Torso-Arms-Handlebar theory is based on scientific principles

1.4.1 Steering servomechanism based on the Torso-Arms-Handlebar theory

1.4.2 Which Torso-Arms-Handlebar geometry work best

1.4.3 Where does the steering servomechanism damping come from

1.4.4 The global system including the rider and 2-Wheeler in the road environment

2. Evidence supporting the new steering theory:

2.1 Testing the Torso-Arms-Handlebar mechanism yourself

2.2 Minimum stable speed calculations WITH and WITHOUT hands on the handlebar

2.3 Slow motion images when going into a turn at slow speed

2.4 Prediction of the lean angles in a steady state curve

2.5 Increased steering swiftness and sensitivity with speed

2.6 Isolating factors affecting steering

2.7 Independent test carried on by the Federation Motocycliste du Quebec (FMQ) in August 2001

2.8 Crossing hands on the handlebar

3. Recommendation to increase driving precision and safety

4. New motorcycle concepts

5. Nine other known steering theories

5.1 Keeping balance with torso leaning right or left

5.2 Gyroscopic reactions of the wheels and engine

5.3 Front fork geometry: Fork angle and Trail

5.4 Countersteering

5.5 Weight on the foot pegs and tightening up the knees

5.6 Lateral shifting out of the body

5.7 Target fixation

5.8 Camber steer of the tires

5.9 Accelerate to straighten up the motorcycle

Site map of the present 2-Wheeler Site

Pierre Ethier's General 2-Wheeler/3Wheeler home-index