ive got a 92 gixxer, and i think im having a problem with my gas mileage, im only getting like 160k's to a like 16-17 litre tank. And a buddy of mine has a 1200cc bike and he gets better than my 750. What should i look at to increase my mileage? oh and im not riding it that hard. And this is mostly highway k's and i drive at like 5000 rpm.