If you find the suspension on your Yamaha FZ to be too stiff and uncomfortable, there are a few tricks you can try to make it softer. However, keep in mind that altering the suspension settings may affect the overall handling and stability of the bike, so it's important to make adjustments carefully and within safe limits. Here are some suggestions:
Adjust preload: Most motorcycles, including the Yamaha FZ, have a preload adjustment feature for the suspension. By adjusting the preload, you can change the amount of compression on the suspension springs. Decreasing the preload can soften the suspension. Consult your motorcycle's owner's manual to locate the preload adjustment mechanism and make adjustments accordingly.
Change fork oil: Fork oil plays a significant role in the suspension's performance. If the fork oil is too thick or worn out, it can contribute to a stiffer suspension. Consider replacing the fork oil with a lighter weight oil that is recommended for your motorcycle model. Consult a professional mechanic or refer to the owner's manual for the correct viscosity and quantity of fork oil.
Replace springs: If you find that the suspension is still too stiff after adjusting the preload and changing the fork oil, you may consider replacing the springs with softer ones. Softer springs will provide more give and absorb bumps better. However, this is a more advanced modification and should ideally be done by a professional or experienced mechanic who can ensure proper compatibility and installation.
Seek professional assistance: If you're uncertain about making suspension adjustments yourself or if you feel that the suspension is excessively stiff even after trying the above steps, it's advisable to take your motorcycle to an authorized service center or a qualified mechanic. They can assess the suspension and make adjustments or recommendations based on your specific needs.
Remember, finding the right suspension setup is often a matter of personal preference and the type of riding conditions you encounter. It's important to strike a balance between comfort and maintaining safe handling characteristics.