Join Date: Feb 2010
Location: Summit NJ
Thanked 167 Times in 135 Posts
Feedback Score: 2 reviews
How similar are you and your buddy weight wise? Weight plays a huge part in fuel mileage. Also tires, what are each of you using, again goes back to weight, I know Michelins are a lot lighter than Dunlops, that is also rotating mass, 1 pound of rotating mass is the same as 1.5 pounds of rigid mass.
Tuning can also have a huge effect on fuel mileage. Changing a pipe will change your fuel mixtures, a rich fuel mixture will use more fuel than a lean mixture, so if his is dangerously lean and yours is dangerously rich you will both see two very different readings.
As everyone said before also, your gearing can hurt you severely. Easiest way to compare your gearing to his is to ride side by side at 60 MPH. If you are both at 60 MPH on your speedo and one of you is traveling faster than the other, or if you are both a different RPM levels obviously one of your gearings are off.
Simply put, engines are air pumps. The more air in and the more out, the more power it will make. Making power and fuel efficiency, believe it or not, go hand in hand. An engine that makes more power (more efficient) will use less fuel and air to accelerate the same mass.
If I can make 100 hp with 3 oz of fuel but you need 4 oz of fuel to make 100 hp, who is going to get better mileage?
Street: 2009 CBR600RR Metallic black Track: 2007 GSXR 600 black/white/blue