I have a 2014 ninja 300 that I've have for over 2 years. On a ride today, I noticed a whining sound that would only show up under acceleration. Sounds very similar to a supercharger whine. I've never heard this sound before. It is only audible in 5th and 6th gear. I just had the chain and sprockets replaced and an oil change done by a licensed shop less than 100 miles ago. I'm nervous to continue riding, as I am worried about causing further damage if something is wrong. Any ideas on what it is?