Quote:
Originally Posted by TexasElectric
How is it that your Honda CBR250R gets 110.31 mpg, but your other 250-300cc bikes get only half?
Honda CBR250R - 110.31 mpg
Ninja 250R SE Green - 65.9 mpg
2015 Yamaha R3 - 79.52 mpg
Are you getting 110.31mpg average at highway speeds (60-70mph)?
|
My fuel logs show reports tht are heavily weighted toward my commute since that is where the majority of my mileage is. Which is city streets at 35 mph with stop signs for the first leg from my house, 80% superhighway at 68mph with following and PnG, and 45mph wide boulevard with a few stop lights and traffic for the last 10%.
.
The Honda world bikes are more fuel efficient because that is where the design emphasis was. As opposed to most other bikes being designed for max performance with high revving cams and short intakes. The CBR250R has a long intake runner and is cammed to give the torque peak at 5,700. And singles are more efficient than twins. Less heat loss in the combustion chamber.
.
And I did change the gearing. 60 mph is 5,700 rpm.
.
The '09 Ninja250 is carbureted and has a 13,000 redline.
.
The R3 was a pleasant surprise. I was in the 80's mpgUS with that bike until I changed the tires and lost 10%. It would benefit from much longer gearing and a bigger windscreen.