| Author | Message | ||
     Buellrobot |
I'm on an 02 x1 w VH exhaust, forcewinder, and race maps. I've got fresh oil and new intake / manifold seals. I haven't seen any changes in mileage, but had not payed close attention until now. I get about 37 miles per gallon when going 80mph on the highway. Any ideas on what might cause this and how I could improve the economy? Thx in advance. | ||
| Kilroy |
go 70 | ||
| Natexlh1000 |
Mine has almost the same setup and uniformly gets low-50's at the same speeds. I only got into the thirties when a H-D "tech" set my timing wrong. Here is a list of dumb stuff that can erode the efficiency of your bike and sap its power: Tires inflated to under 20 pounds. (That one got me earlier this year) Temp sensor telling the ECU that the engine is cold (like a stuck choke) O2 sensor telling the CPU that it needs more gas to balance the mixture. (An air leak upstream of the rear header???? I think you would hear it before it was able to mess with your O2 sensor) | ||
| Reepicheep |
My M2 would average around 42 to 45 MPG. For an X1 with race maps and exhaust, 37mpg doesn't sound unreasonable to me. Power requirements increase with the square of velocity... its not linear. So dropping cruise speed from 80 mph to 60 mph (a 25% decrease in speed) will give you a much bigger economy gain then just that 25% (which would already bump you up to 46 MPG). A stock ECM and exhaust would probably help even more. | ||
| Greg_cifu |
^ ^ ^ ^ ^ ^ ^ ^ What he said. 80 MPH is pushing a LOT of air out of the way. If you're CRUISING at that speed from fill-up to fill-up, 37 sounds totally reasonable. | ||
| Buellistic |
Take the 26 tooth counter shaft sprocket off and put on a 29 tooth counter shaft sprocket and your gas mileage will get a lot better !!! Other things that affect gas mileage Ex leaks intake leaks timmimg incorrect tire pressure wind resistance drive belt "TOO TIGHT" Primary chain "TOO TIGHT" wheel bearings need re-greasing un-controlable throttle hand carburetor not jetted correctly wheel axles not torqued correctly air cleaner not big enough or dirty too much oil in transmission O2 sensor dirty or going bad no body ever thinks about the IAT Pull the code and see what is set ??? | ||
| Natexlh1000 |
Like I said before, I get 50-55 miles per gallon on a long highway trip. I have a forcewinder, race ECU, LOUD pipe. On a long trip I usually hover between 75-80. Something is just a little bit wrong with his bike. | ||
| Froggy |
I agree, my gas guzzling 1125s do better even on the track. Fire up ECMspy and check your AFV. (Message edited by froggy on September 16, 2011) | ||
| Buellrobot |
Ok, so I slowed down to 70 and was able to get 45 mpg, which is better, but still not fantastic. I'm currently at tail end of a cross country trip on the X1 (from NYC > SF... currently pit stopped in LA). For the most part, the bike has performed really well. I'm wondering if something's up w/ my 02 sensor though... Somewhere in West Texas, the engine light came on while I was riding and stayed on for like 15-20 seconds. I jumpered the pins to get engine error codes and got a 13, which I see is O2 sensor. I haven't seen the engine light come on since that time. Incidentally, I also checked my engine oil then and realized I was pretty low, so I grabbed a quart from a nearby auto-zone and filled it back to the low-fill line. Seems unrelated, but worth mentioning. Other stuff I did before I left: changed both oils, new filter, tensioned belt and primary, new tires, new brake pads, new intake/manifold seals, tire pressure on higher side (conti road attack @ 36/40), new front iso. So I'll look into some of the other suggestions... but curious what folks think about that O2 error. And as always, really appreciate everyone's advice! | ||
| Natexlh1000 |
As Buelistic will chime in, make sure your belt is sloppy loose. The manual is wrong. I can easily touch my belt to the top of my swingarm with a fingertip. Other than the O2 sensor itself, I have had other causes for an O2 error popping up: O2 sensor wire chafed to pipe, grounding it. Exhaust header wasn't on tight, making the grounding of the O2 sensor "noisy" and confusing the ECU. A marginal O2 sensor would make sense with the marginal fuel economy. | ||
| Buellistic |
Natexlh1000: "THANKS" for thinking out of the BOX as GROUNDING body of the 02 sensor to the frame/engine is a good idea IMHO !!! | ||
| Natexlh1000 |
Oh! I never actually ran a separate wire to the ground. I just tightened up the header to the big conductive engine  | ||
| Oldfartnbuell |
"02"x1, always 55 mpg or better. No matter the speed! | ||
| Desertfox |
Long Freeway rides of 80mph usually net me about 50mpg. Lately less. I noticed today that I have a fuel injector o-ring leak. Still getting 35 or so mpg, but obviously I still have to fix the leak. Definitely look for a fuel leak somewhere. It could be that simple. | ||
| 01x1buell |
my 01 gets 45mpg when cruising and 30 to 35 when really getting on it all day long. |
