Turbo Noise

[Switchrider900]

I recently noticed that I have a high pitch noise which I think is coming from the turbo... I think. It only happens at certain speeds roughly around 13 mph and then at 32 mph. Then with a let off the throtle at those points it stops.

Normal or not normal? Or is it just the turbo spooling up?

Still determining all the noises this truck makes.

Love the truck though!!!!