Bending the central shock absorbers of a Yamaha YZF-R15 (or any motorcycle) to lower the seat height can have several consequences and is generally not recommended. Here are some potential issues that may arise:
Suspension Performance: The suspension system is designed to provide optimal performance and stability, taking into account factors like weight distribution, travel distance, and damping characteristics. Bending the shock absorbers can affect the suspension's ability to absorb bumps, leading to compromised ride quality, reduced handling, and potential safety risks.
Structural Integrity: Bending the shock absorbers puts stress on the components and may compromise their structural integrity. The shock absorbers are designed to function within their intended range of motion and altering their shape can lead to weakened parts or even failure.
Handling and Stability: Modifying the suspension geometry by altering the shock absorber position can impact the bike's handling and stability. It may introduce handling issues, such as changes in steering response, cornering behavior, and overall stability, which can affect the safety and control of the motorcycle.
Warranty and Safety: Any modifications made to the motorcycle that are not approved by the manufacturer can potentially void your warranty. Additionally, modifying critical components like the suspension may introduce safety risks, as the motorcycle may not perform as intended or expected by the manufacturer.
If you are concerned about the seat height of your Yamaha YZF-R15, it is recommended to explore other options that are designed specifically for this purpose. For example, you could consider adjusting the seat or exploring aftermarket options for lowering kits that are specifically designed to maintain the suspension's integrity while reducing the seat height. It is advisable to consult with a professional Yamaha dealer or an experienced motorcycle mechanic who can provide guidance on safe and approved methods to achieve your desired seat height without compromising the bike's performance and safety.