Does a smaller exhaust make the motorbike high pitch?

Yes, a smaller exhaust can produce a higher pitch sound in a motorbike. This is because smaller diameter exhaust systems tend to increase exhaust gas velocity, which can lead to a sharper, more aggressive tone. Additionally, the design and material of the exhaust can also influence the sound characteristics, contributing to a higher pitch. However, the overall sound will also depend on other factors like the engine configuration and tuning.