Raising the front end of a two-wheeler, also known as increasing the rake angle or raising the fork tubes, can have several effects on the steering ability and stability of the motorcycle under normal conditions. Here are the general effects:
Steering Ability: Raising the front end typically increases the trail, which is the distance between the point where the steering axis intersects the ground and the contact patch of the front tire. Increasing the trail makes the steering slower and less responsive, requiring more effort to turn the handlebars. This can result in a more stable and relaxed steering feel, which can be desirable for cruising or long-distance riding.
Stability: Raising the front end generally enhances the straight-line stability of the motorcycle. The increased trail helps the bike resist changes in direction, making it less prone to wobbling or instability, especially at lower speeds. This can be advantageous for riding in a straight line or on highways.
Maneuverability: On the other hand, raising the front end can reduce the maneuverability and agility of the motorcycle, especially at lower speeds or when making tight turns. The increased trail can make the bike feel less nimble and require more effort to change direction quickly. This effect may be more noticeable in situations that demand quick, sharp turns or in low-speed maneuvers.
It's worth noting that these effects can vary depending on the specific design and geometry of the motorcycle, including factors like frame geometry, suspension setup, and weight distribution. Additionally, other modifications or adjustments, such as changes to the rear suspension or tire size, can also influence the overall handling characteristics. Therefore, it's important to consider these factors holistically when making any modifications to the front end of a motorcycle.