Everyone,
I purchased a used 2012 CRB250R with 248 miles on it on June 1. The purpose for purchasing the bike was to get the excellent mileage that most people seem to be getting. When I went to look at the bike, I noticed that it had a Two Brothers Exhaust Since I am strictly interested in gas mileage, I asked the dealership to replace the aftermarket exhaust (slip on) with a factory exhaust. At the very least, I wanted to start with an "all factory" bike. The first few tanks yielded about 70 MPG with very very limited high RPM riding. Nearly all of my riding was on state highways at about 60 mph.
To improve the mileage, I deceided to go with the 15/36T gearing that is available from PMP. I changed gearing and my mpg went from 70 to 75 MPG. Others on the forum were talking about getting 90 or better.
To further improve my mileage, I made a 17T for the front. After a little bit of effort, I made it work. However, I am still only getting 80 MPG.
I measure my fuel ups very carefully using methods found on this forum and proven to work. I also purchased a Speedohealer and programmed it correctly. I have not only compensated for the gearing, but also the factory error. When I get on the interstate, I compare my odometer to the mile markers, and it is spot on. It took me several runs to fine tune, but now it is repeatable and consistent.
I have tried to reset the ECU at about 1350 miles thinking that the previous owner ran the bike hard and that the computer "learned" this style of riding. I found out that he traded in the bike for a CBR1000RR claiming that the 250 did not have enough power. The other thought I had was that he actually reprogrammed the fuel curve (or had some one else do it) to get as much power out of it as possible. Anyway, I tried to reset the ECU but am not sure I did it correctly. I followed both the shop manual and on line help I found but did not get the correct flashing lights (MIL) that I was told to expect. I rode a bunch of highway miles immediately after the ECU "wipe". To no avail... 78 MPG.
My next plan is to take it to the Honda Dealer to have them check it out and see if there is a program in there or at the very least put the ECU back to stock. Another option is to purchase a programmer and adjust the fuel curve myself, but I want to avoid doing that at this point because I should not be having these issues with the stock setup.
I have not pulled the door from the air box and I am not hypermileing, but I am tucking above 60 mph for multiple reasons.
Anyone have any thoughts on why I'm seeing this mileage and not 90 MPG or better?
Thanks for the help.
I purchased a used 2012 CRB250R with 248 miles on it on June 1. The purpose for purchasing the bike was to get the excellent mileage that most people seem to be getting. When I went to look at the bike, I noticed that it had a Two Brothers Exhaust Since I am strictly interested in gas mileage, I asked the dealership to replace the aftermarket exhaust (slip on) with a factory exhaust. At the very least, I wanted to start with an "all factory" bike. The first few tanks yielded about 70 MPG with very very limited high RPM riding. Nearly all of my riding was on state highways at about 60 mph.
To improve the mileage, I deceided to go with the 15/36T gearing that is available from PMP. I changed gearing and my mpg went from 70 to 75 MPG. Others on the forum were talking about getting 90 or better.
To further improve my mileage, I made a 17T for the front. After a little bit of effort, I made it work. However, I am still only getting 80 MPG.
I measure my fuel ups very carefully using methods found on this forum and proven to work. I also purchased a Speedohealer and programmed it correctly. I have not only compensated for the gearing, but also the factory error. When I get on the interstate, I compare my odometer to the mile markers, and it is spot on. It took me several runs to fine tune, but now it is repeatable and consistent.
I have tried to reset the ECU at about 1350 miles thinking that the previous owner ran the bike hard and that the computer "learned" this style of riding. I found out that he traded in the bike for a CBR1000RR claiming that the 250 did not have enough power. The other thought I had was that he actually reprogrammed the fuel curve (or had some one else do it) to get as much power out of it as possible. Anyway, I tried to reset the ECU but am not sure I did it correctly. I followed both the shop manual and on line help I found but did not get the correct flashing lights (MIL) that I was told to expect. I rode a bunch of highway miles immediately after the ECU "wipe". To no avail... 78 MPG.
My next plan is to take it to the Honda Dealer to have them check it out and see if there is a program in there or at the very least put the ECU back to stock. Another option is to purchase a programmer and adjust the fuel curve myself, but I want to avoid doing that at this point because I should not be having these issues with the stock setup.
I have not pulled the door from the air box and I am not hypermileing, but I am tucking above 60 mph for multiple reasons.
Anyone have any thoughts on why I'm seeing this mileage and not 90 MPG or better?
Thanks for the help.