F4i - Main Forum Main F4i discussion board

TERRIBLE gas mileage - this one's different. promise.

  #1  
Old 01-14-2015, 05:17 PM
Junior Member
Thread Starter
Join Date: Jan 2015
Posts: 20
Default TERRIBLE gas mileage - this one's different. promise.

My cbr has always got about 90-100 miles till the reserve. that's about 33mpg. I am pretty hard on it with accelerating. It just makes me happy. haha anyway, Thats pretty bad, but leagues better than my truck. Well, yesterday I filled up. Set the trip meter, and the light came on at 51 MILES?!?! that's absolute garbage... I would have thought FPR, but the bike shows no other symptoms.. Any ideas?
 
  #2  
Old 01-14-2015, 05:29 PM
74demon's Avatar
Administrator and MVN, March 2012/Oct 2013 ROTM
Join Date: Sep 2011
Location: socal 949/951
Posts: 7,845
Default

The light came on, but is it really that low?

Run another tank through it. Make sure to get it full, run it, and fill it again. See what you got then.
 
  #3  
Old 01-15-2015, 01:08 PM
Senior Member
Join Date: Jul 2008
Location: Mesa AZ
Posts: 2,000
Default

How much gas did 51 miles take to refill? If you only used a gallon then you know its not a gas mileage problem.
 
  #4  
Old 01-15-2015, 09:25 PM
Junior Member
Thread Starter
Join Date: Jan 2015
Posts: 20
Default

3.5 gallons, but to be fair, I only put 5 dollars in when the light came on the first time. Which was about 2 gallons
 
  #5  
Old 01-18-2015, 09:59 AM
Brotha J's Avatar
Member
Join Date: Aug 2010
Location: DFW, Texas
Posts: 77
Default

Always fill up to the tippy top before trying to monitor mileage.

Forgive if this doesn't apply, that Ethanol garbage in the gas really does a number on gas mileage. Make sure you put in the 87 octane. Not all stations have the 87 in the same position at the pump unit.
 
  #6  
Old 01-18-2015, 10:24 AM
Conrice's Avatar
Retired Super Moderator and Fighterer
Join Date: Nov 2006
Posts: 6,148
Default

But even putting premium in is not going to affect it that much.

Now that the tank is full, you need to monitor this.

If you let your bike warm up properly before you go, how far you ride makes a difference too. For example, my commute in college was 3 miles each way. So, if I didn't have a real ride during that time, I was only getting about 90 miles to the tank. But when I'd take long spirited rides, I'd be back to 120 or so before the light came on. That's a substantial difference, and it was due to how much time the bike was running and heating up without the odometer ticking.

Now that you know the tank is full, lets see what happens. And you're sure the bike is running normally and that there isn't a fuel leak?
 
  #7  
Old 01-19-2015, 04:26 PM
Junior Member
Thread Starter
Join Date: Jan 2015
Posts: 20
Default

Filled up as much as possible.. light came on at 110 miles, however, that was a lot of 80mph interstate riding and some spirited acceleration.. I'm assuming the low mileage was due to the short commute around town.
 
  #8  
Old 01-19-2015, 07:45 PM
Conrice's Avatar
Retired Super Moderator and Fighterer
Join Date: Nov 2006
Posts: 6,148
Default

110 is definitely back into the normal range. Glad you have some peace of mind now.
 
  #9  
Old 01-20-2015, 11:17 AM
Senior Member
Join Date: Jul 2008
Location: Mesa AZ
Posts: 2,000
Default

I feel so bad for you guys. The only time I've ever had my light come on at 110miles is when I ride to a canyon and use it as a track running lap after lap. I wonder why the massive difference in gas mileage. Anyone ever do compression or leak down tests on their motors?
 
  #10  
Old 01-21-2015, 08:46 AM
Junior Member
Thread Starter
Join Date: Jan 2015
Posts: 20
Default

Originally Posted by boredandstroked View Post
I feel so bad for you guys. The only time I've ever had my light come on at 110miles is when I ride to a canyon and use it as a track running lap after lap. I wonder why the massive difference in gas mileage. Anyone ever do compression or leak down tests on their motors?

My compression should be fine... Unless sitting up hurt it. It only has 2500 miles..
 

Thread Tools
Search this Thread
Quick Reply: TERRIBLE gas mileage - this one's different. promise.


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.