Is there a 'sweet spot' that I should be aiming. I'll be honest this is my first bike in a few years that has a tach and it's my first non cruiser since the ninja 650 I started on in 2012. Where is your 'sweet spot' while riding? I'm finding I keep mine between 3500 and 4k but wasn't sure if that was too low for the bike. I feel like a major noob with this type of question.