Your bike doesn't have a fuel gauge. A fuel guage would be added weight and to be honest with you, on a sport bike, you really don't need the extra gauge or the added weight. Save that weight for big-fat-over-weight-slow-cruisers.
As mentioned by other members use your odo or trip to help determine how far you can get on a full tank after a fill-up, running the bike until you have to switch to reserve. Once you know what your range is, remember it by either mentally remebering the odo, or by resetting the trip. You'll find your mileage will be pretty consistent even in mixed driving conditions. I know mine is.
If you are unsure how much gas you have or are getting ready for a lenghty ride, do what I do.
1. CAREFULLY and GENTLY rock the bike back and forth between your legs (both feet planted firmly on the ground) with the engine not running and listen for how the gas level sounds as it sloshes inside the tank. After a while you can get pretty good at determining how much gas you have just by how it sounds sloshing in the tank. BE careful not to drop the bike. I actually do this with the side stand in the down position.
2. Open the tank and look inside. Yes, it works.
Hope that helps...
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