Why does your 2000 v-star 650 have a whining noise in fifth gear?

A whining noise in fifth gear of your 2000 V-Star 650 could be due to several factors, including low Transmission Fluid levels, worn gears or bearings, or misalignment in the transmission components. It's also possible that the noise is a result of normal operational sounds magnified at higher speeds. To diagnose the issue accurately, it's advisable to check the fluid levels, inspect for wear, and consult a mechanic if the problem persists.