The recommended shift points for gears on a motorcycle can vary depending on factors such as riding conditions, personal preference, and the specific model of the motorcycle.
For upshifting, a common guideline is to shift gears at around 8,000 to 10,000 revolutions per minute (RPM) to keep the engine operating within its optimal power band. It's best to listen to the engine sound and pay attention to the bike's performance to determine the right time to shift up.
For downshifting, it's generally recommended to match the engine RPM with the appropriate gear. As you slow down and the RPM drops, you should downshift to lower gears to maintain engine braking and be prepared for any necessary acceleration.
Keep in mind that these are general guidelines, and the specific recommendations may be outlined in the owner's manual for the Suzuki RS650 2003. It's always a good idea to refer to the manufacturer's guidelines and take into account your own experience and comfort level while riding.