The tick is not "normal", smh. Yes, it is a common problem with Kawi's, but it isn't normal. The tick is a malfunctioning cam chain tensioner. When a cam chain loosens over time, the tensioner automatically adjusts to provide the correct amount of tension on the chain. Do you know what happens when you have a loose cam chain and continue to ride your bike? That's right, it can come off, turning your "normal" tick into a terrible catastrophe. Download your service manual from the service manual section of this site and follow the steps on removing and resetting your current tensioner. If you find that it is damaged you can buy a new auto tensioner or switch to a manual tensioner as a lot if guys do. It's a fairly simple process and should be done if your hearing a pronounced tick. At times you can hear a slight tick when the tensioner is in between clicks, but this goes away once it reaches the next setting. Please get this taken care of and try not to ride that much with this issue. Take care of your bike and it will take care of you. And follow the service manual first and foremost, not the majority if advice you get on here (your bike will last longer).