Whining noise

Hey I’m kinda new at this forum but I’ve got a 2010 850 xp touring and was riding yesterday and after 10-15 minutes of riding it started making a pretty loud whining noise coming from under the handlebars, it gets louder when you rev the engine, does it in gear and park and neutral, was trying to see where it was coming from and then it quit, just started doing this, can’t tell it’s affecting the running of it but it’s pretty loud, anybody had any problems or know what to look for, thought it might be water pump but not sure