So I'm new to the bike world. I know my way around cars but not so much on bikes. I recently picked up an 03 R6. I got it with 50k.
Ive gone through 2 gas tanks and I am only get getting 145km before the gas light goes on. Is this normal? I've heard that this bike should get 180km ?
Any suggestions what I should look at first? Is there any maintenance I should do to the bike since it has high km? The bike came with a safety but Im sure the guy did it himself.
Any help would be great.

Thanks